38 results on '"Dawood F"'
Search Results
2. An Empirical Study on the Affecting Factors of Cloud-based ERP System Adoption in Iraqi SMEs
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Mohammed G. J, MA Burhanuddin, Dawood F. A. A, Alyousif S, Alkhayyat A, Ali M. H, R. Q. Malik, and Jaber M. M
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General Computer Science - Published
- 2023
3. Studying the Effectiveness of Anise Extract and Alignite Nanoparticles on the Balance of the Microbial Gut Flora and Some Immunological Parameters in the Laboratory Guinea Pigs
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Dawood, F S, primary and Thalij, K M, additional
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- 2021
- Full Text
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4. Recombinant human granulocyte– colony stimulating factor in women with unexplained recurrent pregnancy losses: a randomized clinical trial
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Eapen, A, Joing, M, Kwon, P, Tong, J, Maneta, E, De Santo, C, Mussai, F, Lissauer, D, Carter, D, Ahmed, A, Bass, C, Benderatik, R, Bhattacharya, R, Cheong, Y, Dawood, F, Granne, I, Gupta, P, Horne, A, Manda, P, Mohiyiddeen, L, Moore, J, Quenby, S, Rai, R, Shillito, J, Stewart, J, Truchanowicz, E, Dwyer, L, Small, R, Sharpe, L, Smith, A, Coomarasamy, A, and Grp, RESPONSE Study
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safety ,medicine.medical_specialty ,abortion, spontaneous ,unexplained recurrent miscarriages ,Population ,adverse event ,immune mediated miscarriages ,live birth ,law.invention ,Miscarriage ,recombinant human granulocyte colony stimulating factor ,03 medical and health sciences ,semi-allogenic fetus ,0302 clinical medicine ,Randomized controlled trial ,law ,congenital abnormality ,antidrug antibody ,Recurrent miscarriage ,cytokine ,Medicine ,neutropenia ,education ,education.field_of_study ,Pregnancy ,pregnancy outcome ,030219 obstetrics & reproductive medicine ,recurrent pregnancy loss ,abortion, habitual ,business.industry ,Obstetrics ,Rehabilitation ,Obstetrics and Gynecology ,medicine.disease ,Early Pregnancy ,recombinant granulocyte colony stimulating factor ,Clinical trial ,Reproductive Medicine ,Gestation ,Original Article ,pregnancy ,granulocyte colony-stimulating factor ,business ,Live birth - Abstract
Study question Does administration of recombinant human granulocyte colony stimulating factor (rhG-CSF) in the first trimester improve pregnancy outcomes, among women with a history of unexplained recurrent pregnancy loss? Summary answer rhG-CSF administered in the first trimester of pregnancy did not improve outcomes among women with a history of unexplained recurrent pregnancy loss. What is known already The only previous randomized controlled study of granulocyte colony stimulating factor in recurrent miscarriage in 68 women with unexplained primary recurrent miscarriage found a statistically significant reduction in miscarriage and improvement in live birth rates. A further four observational studies where G-CSF was used in a recurrent miscarriage population were identified in the literature, two of which confirmed statistically significant increase in clinical pregnancy and live birth rates. Study design, size, duration A randomized, double-blind, placebo controlled clinical trial involving 150 women with a history of unexplained recurrent pregnancy loss was conducted at 21 sites with established recurrent miscarriage clinics in the United Kingdom between 23 June 2014 and 05 June 2016. The study was coordinated by University of Birmingham, UK. Participants/materials, setting, methods One hundred and fifty women with a history of unexplained recurrent pregnancy loss: 76 were randomized to rhG-CSF and 74 to placebo. Daily subcutaneous injections of recombinant human granulocyte – colony stimulating factor 130 μg or identical appearing placebo from as early as three to five weeks of gestation for a maximum of 9 weeks. The trial used central randomization with allocation concealment. The primary outcome was clinical pregnancy at 20 weeks of gestation, as demonstrated by an ultrasound scan. Secondary outcomes included miscarriages, livebirth, adverse events, stillbirth, neonatal birth weight, changes in clinical laboratory variables following study drug exposure, major congenital anomalies, preterm births and incidence of anti-drug antibody formation. Analysis was by intention to treat. Main results and the role of chance A total of 340 participants were screened for eligibility of which 150 women were randomized. 76 women (median age, 32[IQR, 29–34] years; mean BMI, 26.3[SD, 4.2]) and 74 women (median age, 31[IQR, 26–33] years; mean BMI, 25.8[SD, 4.2]) were randomized to placebo. All women were followed-up to primary outcome, and beyond to live birth. The clinical pregnancy rate at 20 weeks, as well as the live birth rate, was 59.2% (45/76) in the rhG-CSF group, and 64.9% (48/74) in the placebo group, giving a relative risk of 0.9 (95% CI: 0.7–1.2;P= 0.48). There was no evidence of a significant difference between the groups for any of the secondary outcomes. Adverse events (AEs) occurred in 52 (68.4%) participants in rhG-CSF group and 43 (58.1%) participants in the placebo group. Neonatal congenital anomalies were observed in 1/46 (2.1%) of babies in the rhG-CSF group versus 1/49 (2.0%) in the placebo group (RR of 0.9; 95% CI: 0.1–13.4;P= 0.93). Limitations, reasons for caution This trial was conducted in women diagnosed with unexplained recurrent pregnancy loss and therefore no screening tests (commercially available) were performed for immune dysfunction related pregnancy failure/s. Wider implications of the findings To our knowledge, this is the first multicentre study and largest randomized clinical trial to investigate the efficacy and safety of granulocyte human colony stimulating factor in women with recurrent miscarriages. Unlike the only available single center RCT, our trial showed no significant increase in clinical pregnancy or live births with the use of rhG-CSF in the first trimester of pregnancy. Study funding/competing interest(s) This study was sponsored and supported by Nora Therapeutics, Inc., 530 Lytton Avenue, 2nd Floor, Palo Alto, CA 94301, USA. Darryl Carter was the co-founder and VP of research, Nora Therapeutics, Inc. and held shares in the company. He holds a patent for the use of recombinant human granulocyte colony stimulating factor to reduce unexplained recurrent pregnancy loss. Mark Joing, Paul Kwon and Jeff Tong were or are employees of Nora Therapeutics, Inc. No other potential conflict of interest relevant to this article was reported. Trial registration number EUDRACT No: 2014-000084-40; ClinicalTrials.gov Identifier: NCT02156063 Trial registration date 31 Mar 2014 Date of first patient’s enrolment 23 Jun 2014
- Published
- 2019
5. A hover view over Australia's hydrogen industry in recent history: The necessity for a hydrogen industry knowledge-sharing platform
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Dawood, F., Shafiullah, GM., Anda, M., Dawood, F., Shafiullah, GM., and Anda, M.
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The hydrogen industry in Australia has gained tremendous momentum in 2018 and after the publishing of the National Hydrogen Roadmap. In this study, a comprehensive review of the recent history of hydrogen-related activities and publications, as well as hydrogen funding programs and the funded projects, was conducted. Most of these activities were tabulated and discussed from the perspective of sorting, documentation, and contrast. The broad picture indicates the need and necessity of a unified national database for the hydrogen industry landscape. An innovative modular online (web-based) crowdsourced database platform is introduced in this paper as the “Australia Hydrogen Industry Knowledge-Sharing Platform” to include all hydrogen-related activities in Australia. This web-based platform will be presented in the form of a business to generate revenue to offset operation and maintenance costs and ensure the system updating. This study will not only guide the Australian governments and/or stakeholders to develop a hydrogen economy for the future but also other countries to promote their hydrogen industry.
- Published
- 2020
6. Stand-alone microgrid with 100% renewable energy: A case study with hybrid solar PV-battery-hydrogen
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Dawood, F., Shafiullah, GM, Anda, M., Dawood, F., Shafiullah, GM, and Anda, M.
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A 100% renewable energy-based stand-alone microgrid system can be developed by robust energy storage systems to stabilize the variable and intermittent renewable energy resources. Hydrogen as an energy carrier and energy storage medium has gained enormous interest globally in recent years. Its use in stand-alone or off-grid microgrids for both the urban and rural communities has commenced recently in some locations. Therefore, this research evaluates the techno-economic feasibility of renewable energy-based systems using hydrogen as energy storage for a stand-alone/off-grid microgrid. Three case scenarios in a microgrid environment were identified and investigated in order to select an optimum solution for a remote community by considering the energy balance and techno-economic optimization. The "HOMER Pro" energy modelling and simulating software was used to compare the energy balance, economics and environmental impact amongst the proposed scenarios. The simulation results showed that the hydrogen-battery hybrid energy storage system is the most cost-effective scenario, though all developed scenarios are technically possible and economically comparable in the long run, while each has different merits and challenges. It has been shown that the proposed hybrid energy systems have significant potentialities in electrifying remote communities with low energy generation costs, as well as a contribution to the reduction of their carbon footprint and to ameliorating the energy crisis to achieve a sustainable future.
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- 2020
7. Hydrogen production for energy: An overview
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Dawood, F., Anda, M., Shafiullah, GM., Dawood, F., Anda, M., and Shafiullah, GM.
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Power to hydrogen is a promising solution for storing variable Renewable Energy (RE) to achieve a 100% renewable and sustainable hydrogen economy. The hydrogen-based energy system (energy to hydrogen to energy) comprises four main stages; production, storage, safety and utilisation. The hydrogen-based energy system is presented as four corners (stages) of a square shaped integrated whole to demonstrate the interconnection and interdependency of these main stages. The hydrogen production pathway and specific technology selection are dependent on the type of energy and feedstock available as well as the end-use purity required. Hence, purification technologies are included in the production pathways for system integration, energy storage, utilisation or RE export. Hydrogen production pathways and associated technologies are reviewed in this paper for their interconnection and interdependence on the other corners of the hydrogen square. Despite hydrogen being zero-carbon-emission energy at the end-use point, it depends on the cleanness of the production pathway and the energy used to produce it. Thus, the guarantee of hydrogen origin is essential to consider hydrogen as clean energy. An innovative model is introduced as a hydrogen cleanness index coding for further investigation and development.
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- 2020
8. Enabling residential hybrid water systems through a water credit-debit system
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Fornarelli, R., Anda, M., Dallas, S., Schmack, M., Dawood, F., Byrne, J., Morrison, G.M., Fox-Reynolds, K., Fornarelli, R., Anda, M., Dallas, S., Schmack, M., Dawood, F., Byrne, J., Morrison, G.M., and Fox-Reynolds, K.
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Smart metering and data analytics enable the implementation of a range of onsite infrastructures for energy, water and waste management to demonstrate the interconnected infrastructure of future smart cities. A smart city funded project in Western Australia is integrating smart metering technology, household participation and data analytics. Better understanding of hybrid water systems at residential scale, as socially accepted solutions to promote water efficiency and economic savings, within the traditional centralised urban water network is achieved. An integrated water model and a system of water credits and debits is developed and tested on a case study for which 10-minute logged water consumption data of its hybrid water system are available for one year. The model is shown to provide a full characterization of the relationship between the household and the water resources, thus assisting with an improved urban water management which promotes the rollout of decentralized hybrid water systems whilst accounting for the impacts on the aquifer as an ecosystem service provider.
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- 2019
9. Enabling residential hybrid water systems through a water credit–debit system
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Fornarelli, R., primary, Anda, M., primary, Dallas, S., primary, Schmack, M., primary, Dawood, F., primary, Byrne, J., primary, Morrison, G. M., primary, and Fox-Reynolds, K., primary
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- 2019
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10. Power to gas energy storage system for energy self-sufficient smart cities development
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Dawood, F., Shafiullah, GM., Anda, M., Dawood, F., Shafiullah, GM., and Anda, M.
- Abstract
The main energy challenge in the smart cities development is the optimization of the energy system to reduce energy cost and greenhouse gas (GHG) emissions. The low feed-in tariff offered by the electricity retailer is another incentive to trade the energy within the project boundaries or neighbouring precincts using the Blockchain peer to peer energy trading. This study develops an energy system model for the RENeW Nexus project as part of smart city development at stage one in the City of Fremantle for a small community (Lot 1819) comprising 36 townhouses and 50 apartments. The system was developed to simulate the optimal Power to Gas (P2G) system for excess renewable energy storage in combination with shared strata battery towards an energy self-sufficiency system. The rooftop area of the townhouses in the developed precinct has been used to generate excess renewable energy from solar photovoltaic (PV) to compensate for less area available on the rooftops of the multi-story apartment's buildings in the presence of a large-scale centralised strata battery. The peer to peer energy trading takes place using Blockchain technology to achieve the energy self-sufficiency goal. The study also identifies the techno-economic viability of P2G system over the large-scale energy storage systems. The model simulation demonstrated that the initial cost of the P2G system is comparably less than the current conventional battery systems.
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- 2018
11. Caesarean scar pregnancy in the UK: a national cohort study
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Harb, HM, primary, Knight, M, additional, Bottomley, C, additional, Overton, C, additional, Tobias, A, additional, Gallos, ID, additional, Shehmar, M, additional, Farquharson, R, additional, Horne, A, additional, Latthe, P, additional, Edi-Osagie, E, additional, MacLean, M, additional, Marston, E, additional, Zamora, J, additional, Dawood, F, additional, Small, R, additional, Ross, J, additional, Bourne, T, additional, Coomarasamy, A, additional, and Jurkovic, D, additional
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- 2018
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12. The renewable energy household lighting for Chibayish inhabitant's in Iraq
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Goodfield, D., Dawood, F., Urmee, T., Shafiullah, GM, Goodfield, D., Dawood, F., Urmee, T., and Shafiullah, GM
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Affordable and clean energy is one of the major goals for global sustainable development. Lighting is a major aspect of human energy consumption and access to quality lighting is one of the most important indicators of human development. Like other countries around the world, the Iraqi government has realized the importance of climate change and the necessity for clean energy which has led them to officially ratifying the Kyoto Protocol in January 2008. However, it is challenging to implement a clean and renewable energy lighting system for a small community like Chibayish in the Iraqi marshes. The Chibayish unique house building technique of man-made islands (floating baskets), results that these floating houses are not connected to the Iraqi national grid. The villagers in Chibayish require artificial light for their indoor living areas after dark and also for night fishing, which is a common practice. In this research study, various renewable energy resources have been examined in order to identify the most locally practical renewable energy technology for household lighting needs. The solar irradiance profile in the area showed the viability of solar energy in comparison to other renewable energy sources considered within these specific environmental conditions. An analysis carried out using HOMER Pro simulator shows that the solar photovoltaic is an affordable and reliable option for this community.
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- 2017
13. Design of a study to examine contact mixing and acute respiratory infection in Ballabgarh, Haryana
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Kumar, S., Amarchand, R., Gosain, M., Sharma, H., Dawood, F., Jain, S., Lafond, K., Widdowson, M.-A., Read, Jonathan Michael, Krishnan, A., Kumar, S., Amarchand, R., Gosain, M., Sharma, H., Dawood, F., Jain, S., Lafond, K., Widdowson, M.-A., Read, Jonathan Michael, and Krishnan, A.
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- 2016
14. INNATE IMMUNE NOD1/RIP2 SIGNALING IS ESSENTIAL FOR CARDIAC HYPERTROPHIC RESPONSE - WITH A SURPRISING CRITICAL INTERACTION WITH MITOCHONDRIAL DANGER ACTIVATOR
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Lin, H., primary, Naito, K., additional, Valaperti, A., additional, Dawood, F., additional, Zhang, L., additional, Li, G., additional, Smyth, D., additional, Moon, M., additional, Liu, Y., additional, and Liu, P.P., additional
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- 2016
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15. Design of a study to examine contact mixing and acute respiratory infection in Ballabgarh, Haryana
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Kumar, S., primary, Amarchand, R., additional, Gosain, M., additional, Sharma, H., additional, Dawood, F., additional, Jain, S., additional, Lafond, K., additional, Widdowson, M.-A., additional, Read, J., additional, and Krishnan, A., additional
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- 2016
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16. Estradiol and luteinizing hormone concentrations in the follicular aspirate during ovum pickup as predictors of in vitro fertilization (IVF) outcome
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Diaa Sarhan, Akmal El Mazny, Tamer Taha, Amira Aziz, Osama Azmy, Dawood Fakhry, and Haitham Torky
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Hormones ,Follicular fluid ,Oocyte quality ,Medicine (General) ,R5-920 ,Reproduction ,QH471-489 - Abstract
Background: A relationship between ‘oocyte quality’ and follicular fluid hormones is expected, since its formation coincides with the ‘oocyte maturation’ phase. The aim of this study was to find a possible relation between oocyte quality with follicular luteinizing hormone (LH) and estradiol (E2) as hormonal parameters of oocyte quality during ovum pickup for intra-cytoplasmic sperm injection (ICSI). Methods: Concentrations of LH and E2 in individual follicular fluid samples obtained during assisted reproduction treatment were related to oocyte nuclear maturation, fertilization and embryo grading. E2 and LH differences between individual groups of oocytes and embryos were calculated using the paired Student’s t test and ANOVA test. Results: Follicular E2 levels showed a significant positive correlation with oocyte nuclear maturation, fertilization and embryo grading being higher in follicles whose oocytes had matured nucleus (475 ± 142.9 ng/ml vs. 332 ± 76.4 ng/ml, P value
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- 2017
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17. The renewable energy household lighting for Chibayish inhabitant’s in Iraq★
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Dawood Furat, Urmee Tania, and Shafiullah G.M.
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Energy conservation ,TJ163.26-163.5 ,Renewable energy sources ,TJ807-830 - Abstract
Affordable and clean energy is one of the major goals for global sustainable development. Lighting is a major aspect of human energy consumption and access to quality lighting is one of the most important indicators of human development. Like other countries around the world, the Iraqi government has realized the importance of climate change and the necessity for clean energy which has led them to officially ratifying the Kyoto Protocol in January 2008. However, it is challenging to implement a clean and renewable energy lighting system for a small community like Chibayish in the Iraqi marshes. The Chibayish unique house building technique of man-made islands (floating baskets), results that these floating houses are not connected to the Iraqi national grid. The villagers in Chibayish require artificial light for their indoor living areas after dark and also for night fishing, which is a common practice. In this research study, various renewable energy resources have been examined in order to identify the most locally practical renewable energy technology for household lighting needs. The solar irradiance profile in the area showed the viability of solar energy in comparison to other renewable energy sources considered within these specific environmental conditions. An analysis carried out using HOMER Pro simulator shows that the solar photovoltaic is an affordable and reliable option for this community.
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- 2017
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18. A Randomized Trial of Progesterone in Women with Recurrent Miscarriages.
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Coomarasamy, A., Williams, H., Truchanowicz, E., Seed, P. T., Small, R., Quenby, S., Gupta, P., Dawood, F., Root, Y. E. M., Atik, R. Bender, Bloemenkamp, K. W. M., Brady, R., Briley, A. L., Cavallaro, R., Cheong, Y. C., Chu, J. J., Eapen, A., Ewies, A., Hoek, A., and Kaaijk, E. M.
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- *
PROGESTERONE , *RECURRENT miscarriage , *COMPARATIVE studies , *GESTATIONAL age , *RESEARCH methodology , *EVALUATION of medical care , *MEDICAL cooperation , *PREGNANCY , *FIRST trimester of pregnancy , *RESEARCH , *VAGINAL medication , *EVALUATION research , *BODY mass index , *RANDOMIZED controlled trials , *TREATMENT effectiveness , *BLIND experiment , *PREVENTION , *THERAPEUTICS - Abstract
Background: Progesterone is essential for the maintenance of pregnancy. However, whether progesterone supplementation in the first trimester of pregnancy would increase the rate of live births among women with a history of unexplained recurrent miscarriages is uncertain.Methods: We conducted a multicenter, double-blind, placebo-controlled, randomized trial to investigate whether treatment with progesterone would increase the rates of live births and newborn survival among women with unexplained recurrent miscarriage. We randomly assigned women with recurrent miscarriages to receive twice-daily vaginal suppositories containing either 400 mg of micronized progesterone or matched placebo from a time soon after a positive urinary pregnancy test (and no later than 6 weeks of gestation) through 12 weeks of gestation. The primary outcome was live birth after 24 weeks of gestation.Results: A total of 1568 women were assessed for eligibility, and 836 of these women who conceived naturally within 1 year and remained willing to participate in the trial were randomly assigned to receive either progesterone (404 women) or placebo (432 women). The follow-up rate for the primary outcome was 98.8% (826 of 836 women). In an intention-to-treat analysis, the rate of live births was 65.8% (262 of 398 women) in the progesterone group and 63.3% (271 of 428 women) in the placebo group (relative rate, 1.04; 95% confidence interval [CI], 0.94 to 1.15; rate difference, 2.5 percentage points; 95% CI, -4.0 to 9.0). There were no significant between-group differences in the rate of adverse events.Conclusions: Progesterone therapy in the first trimester of pregnancy did not result in a significantly higher rate of live births among women with a history of unexplained recurrent miscarriages. (Funded by the United Kingdom National Institute of Health Research; PROMISE Current Controlled Trials number, ISRCTN92644181.). [ABSTRACT FROM AUTHOR]- Published
- 2015
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19. Influenza-associated respiratory illness among five cohorts of pregnant women and their young infants (0-6 months), Bangladesh, 2013-2017.
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Akhtar Z, Ghosh P, Bhuiyan M, Sturm-Ramirez K, Rahman M, Howlader M, Dawood F, Chowdhury F, and Iuliano D
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- Infant, Pregnancy, Humans, Female, Pregnant Women, Bangladesh epidemiology, Cough, Real-Time Polymerase Chain Reaction, Influenza, Human complications, Influenza, Human epidemiology, Influenza, Human prevention & control, Pregnancy Complications, Infectious epidemiology, Pregnancy Complications, Infectious prevention & control, Virus Diseases, Influenza Vaccines
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Background: Pregnant women with their infants are considered at higher risk for influenza-associated complications, and the World Health Organization (WHO) recommends influenza vaccination during pregnancy to protect them, including their infants (0-6 months). There are limited data on the influenza burden among pregnant women and their infants (0-6 months), and there are no routine influenza vaccinations in Bangladesh., Methods: Five annual cohorts (2013-2017) of pregnant women were enrolled from the eight sub-districts of Bangladesh before the influenza season (May-September); they were contacted weekly to identify new onset of influenza-like illness (ILI) (subjective or measured fever and cough) and acute respiratory illness (ARI) (at least two of these symptoms: cough, rhinorrhea, or difficulty in breathing) among their infants from birth to 6 months of age. We collected nasopharyngeal swabs from ILI and ARI cases, tested by real-time reverse transcription polymerase chain reaction (rRT-PCR) for influenza virus (including types and subtypes) and estimated influenza incidence (95% CI)/10000 pregnant women-months or infant-months, respectively., Results: We enrolled 9020 pregnant women, followed for 26,709 pregnancy-months, and detected 1241 ILI episodes. We also followed 8963 infants for 51,518 infant-months and identified 5116 ARI episodes. Influenza positivity was 23% for ILI and 3% for ARI cases. The overall incidence (2013-2017) of influenza among pregnant women was 158.5/10000 pregnant women-months (95% CI: 141.4-177.6) and that among infants was 21.9/10000 infant-months (95% CI: 18.2-26.5)., Conclusions: Although the data was collected more than 5 years ago, as the only baseline data, our findings illustrate evidence of influenza burden among pregnant women and infants (0-6 months), which may support preventive policy decisions in Bangladesh., Competing Interests: The authors have no competing interest to declare., (© 2023 The Authors. Influenza and Other Respiratory Viruses published by John Wiley & Sons Ltd. This article has been contributed to by U.S. Government employees and their work is in the public domain in the USA.)
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- 2023
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20. Assessment of Neurodevelopment in Infants With and Without Exposure to Asymptomatic or Mild Maternal SARS-CoV-2 Infection During Pregnancy.
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Firestein MR, Shuffrey LC, Hu Y, Kyle M, Hussain M, Bianco C, Hott V, Hyman SP, Kyler M, Rodriguez C, Tejeda Romero M, Tzul Lopez H, Alcántara C, Amso D, Austin J, Bain JM, Barbosa J, Battarbee AN, Bruno A, Ettinger S, Factor-Litvak P, Gilboa S, Goldman S, Gyamfi-Bannerman C, Maniatis P, Marsh R, Morrill T, Mourad M, Muhle R, Newes-Adeyi G, Noble KG, O'Reilly KC, Penn AA, Reichle L, Sania A, Semenova V, Silver WG, Smotrich G, Tita AT, Tottenham N, Varner M, Welch MG, Zork N, Garey D, Fifer WP, Stockwell MS, Monk C, Dawood F, and Dumitriu D
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- Infant, Newborn, Child, Female, Pregnancy, Humans, Infant, Male, Child, Preschool, Adult, Cohort Studies, Prospective Studies, Cross-Sectional Studies, SARS-CoV-2, COVID-19 epidemiology, Prenatal Exposure Delayed Effects epidemiology, Pregnancy Complications, Infectious epidemiology
- Abstract
Importance: Associations between prenatal SARS-CoV-2 exposure and neurodevelopmental outcomes have substantial public health relevance. A previous study found no association between prenatal SARS-CoV-2 infection and parent-reported infant neurodevelopmental outcomes, but standardized observational assessments are needed to confirm this finding., Objective: To assess whether mild or asymptomatic maternal SARS-CoV-2 infection vs no infection during pregnancy is associated with infant neurodevelopmental differences at ages 5 to 11 months., Design, Setting, and Participants: This cohort study included infants of mothers from a single-site prospective cross-sectional study (COVID-19 Mother Baby Outcomes [COMBO] Initiative) of mother-infant dyads and a multisite prospective cohort study (Epidemiology of Severe Acute Respiratory Syndrome Coronavirus 2 in Pregnancy and Infancy [ESPI]) of pregnant individuals. A subset of ESPI participants was subsequently enrolled in the ESPI COMBO substudy. Participants in the ongoing COMBO study were enrolled beginning on May 26, 2020; participants in the ESPI study were enrolled from May 7 to November 3, 2021; and participants in the ESPI COMBO substudy were enrolled from August 2020 to March 2021. For the current analysis, infant neurodevelopment was assessed between March 2021 and June 2022. A total of 407 infants born to 403 mothers were enrolled (204 from Columbia University Irving Medical Center in New York, New York; 167 from the University of Utah in Salt Lake City; and 36 from the University of Alabama in Birmingham). Mothers of unexposed infants were approached for participation based on similar infant gestational age at birth, date of birth, sex, and mode of delivery to exposed infants., Exposures: Maternal symptomatic or asymptomatic SARS-CoV-2 infection., Main Outcomes and Measures: Infant neurodevelopment was assessed using the Developmental Assessment of Young Children, second edition (DAYC-2), adapted for telehealth assessment. The primary outcome was age-adjusted standard scores on 5 DAYC-2 subdomains: cognitive, gross motor, fine motor, expressive language, and receptive language., Results: Among 403 mothers, the mean (SD) maternal age at delivery was 32.1 (5.4) years; most mothers were of White race (240 [59.6%]) and non-Hispanic ethnicity (253 [62.8%]). Among 407 infants, 367 (90.2%) were born full term and 212 (52.1%) were male. Overall, 258 infants (63.4%) had no documented prenatal exposure to SARS-CoV-2 infection, 112 (27.5%) had confirmed prenatal exposure, and 37 (9.1%) had exposure before pregnancy or at an indeterminate time. In adjusted models, maternal SARS-CoV-2 infection during pregnancy was not associated with differences in cognitive (β = 0.31; 95% CI, -2.97 to 3.58), gross motor (β = 0.82; 95% CI, -1.34 to 2.99), fine motor (β = 0.36; 95% CI, -0.74 to 1.47), expressive language (β = -1.00; 95% CI, -4.02 to 2.02), or receptive language (β = 0.45; 95% CI, -2.15 to 3.04) DAYC-2 subdomain scores. Trimester of exposure and maternal symptom status were not associated with DAYC-2 subdomain scores., Conclusions and Relevance: In this study, results of a novel telehealth-adapted observational neurodevelopmental assessment extended a previous finding of no association between prenatal exposure to maternal SARS-CoV-2 infection and infant neurodevelopment. Given the widespread and continued high prevalence of COVID-19, these data offer information that may be helpful for pregnant individuals who experience asymptomatic or mild SARS-CoV-2 infections.
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- 2023
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21. A Robust Deep Model for Classification of Peptic Ulcer and Other Digestive Tract Disorders Using Endoscopic Images.
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Mahmood S, Fareed MMS, Ahmed G, Dawood F, Zikria S, Mostafa A, Jilani SF, Asad M, and Aslam M
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Accurate patient disease classification and detection through deep-learning (DL) models are increasingly contributing to the area of biomedical imaging. The most frequent gastrointestinal (GI) tract ailments are peptic ulcers and stomach cancer. Conventional endoscopy is a painful and hectic procedure for the patient while Wireless Capsule Endoscopy (WCE) is a useful technology for diagnosing GI problems and doing painless gut imaging. However, there is still a challenge to investigate thousands of images captured during the WCE procedure accurately and efficiently because existing deep models are not scored with significant accuracy on WCE image analysis. So, to prevent emergency conditions among patients, we need an efficient and accurate DL model for real-time analysis. In this study, we propose a reliable and efficient approach for classifying GI tract abnormalities using WCE images by applying a deep Convolutional Neural Network (CNN). For this purpose, we propose a custom CNN architecture named GI Disease-Detection Network (GIDD-Net) that is designed from scratch with relatively few parameters to detect GI tract disorders more accurately and efficiently at a low computational cost. Moreover, our model successfully distinguishes GI disorders by visualizing class activation patterns in the stomach bowls as a heat map. The Kvasir-Capsule image dataset has a significant class imbalance problem, we exploited a synthetic oversampling technique BORDERLINE SMOTE (BL-SMOTE) to evenly distribute the image among the classes to prevent the problem of class imbalance. The proposed model is evaluated against various metrics and achieved the following values for evaluation metrics: 98.9%, 99.8%, 98.9%, 98.9%, 98.8%, and 0.0474 for accuracy, AUC, F1-score, precision, recall, and loss, respectively. From the simulation results, it is noted that the proposed model outperforms other state-of-the-art models in all the evaluation metrics.
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- 2022
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22. Influenza vaccine effectiveness within prospective cohorts of healthcare personnel in Israel and Peru 2016-2019.
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Thompson MG, Soto G, Peretz A, Newes-Adeyi G, Yoo YM, Hirsch A, Katz MA, Tinoco Y, Shemer Avni Y, Ticona E, Malosh R, Martin E, Matos E, Reynolds S, Wesley M, Ferdinands J, Cheung A, Levine M, Bravo E, Arriola CS, Ester Castillo M, Carlos Castro J, Dawood F, Greenberg D, Manuel Neyra Quijandría J, Azziz-Baumgartner E, Monto A, and Balicer RD
- Subjects
- Delivery of Health Care, Humans, Israel epidemiology, Peru epidemiology, Prospective Studies, Seasons, Vaccination, Vaccine Efficacy, Influenza Vaccines, Influenza, Human epidemiology, Influenza, Human prevention & control
- Abstract
Background: There are limited data on influenza vaccine effectiveness (IVE) in preventing laboratory-confirmed influenza illness among healthcare personnel (HCP)., Methods: HCP with direct patient contact working full-time in hospitals were followed during three influenza seasons in Israel (2016-2017 to 2018-2019) and Peru (2016 to 2018). Trivalent influenza vaccines were available at all sites, except during 2018-2019 when Israel used quadrivalent vaccines; vaccination was documented by electronic medical records, vaccine registries, and/or self-report (for vaccinations outside the hospital). Twice-weekly active surveillance identified acute respiratory symptoms or febrile illness (ARFI); self-collected respiratory specimens were tested by real-time reverse transcription polymerase chain reaction (PCR) assay. IVE was 100 × 1-hazard ratio (adjusted for sex, age, occupation, and hospital)., Results: Among 5,489 HCP who contributed 10,041 person-seasons, influenza vaccination coverage was 47% in Israel and 32% in Peru. Of 3,056 ARFIs in Israel and 3,538 in Peru, A or B influenza virus infections were identified in 205 (7%) in Israel and 87 (2.5%) in Peru. IVE against all viruses across seasons was 1% (95% confidence interval [CI] = -30%, 25%) in Israel and 12% (95% CI = -61%, 52%) in Peru., Conclusion: Estimates of IVE were null using person-time models during six study seasons in Israel and Peru., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021. Published by Elsevier Ltd.)
- Published
- 2021
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23. Innate Immune Nod1/RIP2 Signaling Is Essential for Cardiac Hypertrophy but Requires Mitochondrial Antiviral Signaling Protein for Signal Transductions and Energy Balance.
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Lin HB, Naito K, Oh Y, Farber G, Kanaan G, Valaperti A, Dawood F, Zhang L, Li GH, Smyth D, Moon M, Liu Y, Liang W, Rotstein B, Philpott DJ, Kim KH, Harper ME, and Liu PP
- Subjects
- Adaptor Proteins, Signal Transducing metabolism, Animals, Animals, Newborn, Cardiomegaly metabolism, Cardiomegaly pathology, Female, Humans, Induced Pluripotent Stem Cells immunology, Induced Pluripotent Stem Cells metabolism, Male, Mice, Mice, Knockout, Nod1 Signaling Adaptor Protein metabolism, Receptor-Interacting Protein Serine-Threonine Kinase 2 metabolism, Signal Transduction physiology, Adaptor Proteins, Signal Transducing immunology, Cardiomegaly immunology, Energy Metabolism physiology, Immunity, Innate physiology, Nod1 Signaling Adaptor Protein immunology, Receptor-Interacting Protein Serine-Threonine Kinase 2 immunology
- Abstract
Background: Cardiac hypertrophy is a key biological response to injurious stresses such as pressure overload and, when excessive, can lead to heart failure. Innate immune activation by danger signals, through intracellular pattern recognition receptors such as nucleotide-binding oligomerization domain 1 (Nod1) and its adaptor receptor-interacting protein 2 (RIP2), might play a major role in cardiac remodeling and progression to heart failure. We hypothesize that Nod1/RIP2 are major contributors to cardiac hypertrophy, but may not be sufficient to fully express the phenotype alone., Methods: To elucidate the contribution of Nod1/RIP2 signaling to cardiac hypertrophy, we randomized Nod1
-/- , RIP2-/- , or wild-type mice to transverse aortic constriction or sham operations. Cardiac hypertrophy, fibrosis, and cardiac function were examined in these mice., Results: Nod1 and RIP2 proteins were upregulated in the heart after transverse aortic constriction, and this was paralleled by increased expression of mitochondrial proteins, including mitochondrial antiviral signaling protein (MAVS). Nod1-/- and RIP2-/- mice subjected to transverse aortic constriction exhibited better survival, improved cardiac function, and decreased cardiac hypertrophy. Downstream signal transduction pathways that regulate inflammation and fibrosis, including NF (nuclear factor) κB and MAPK (mitogen-activated protein kinase)-GATA4/p300, were reduced in both Nod1-/- and RIP2-/- mice after transverse aortic constriction compared with wild-type mice. Coimmunoprecipitation of extracted cardiac proteins and confocal immunofluorescence microscopy showed that Nod1/RIP2 interaction was robust and that this complex also included MAVS as an essential component. Suppression of MAVS expression attenuated the complex formation, NF κB signaling, and myocyte hypertrophy. Interrogation of mitochondrial function compared in the presence or ablation of MAVS revealed that MAVS serves to suppress mitochondrial energy output and mediate fission/fusion related dynamic changes. The latter is possibly linked to mitophagy during cardiomyocytes stress, which may provide an intriguing link between innate immune activation and mitochondrial energy balance under stress or injury conditions., Conclusions: We have identified that innate immune Nod1/RIP2 signaling is a major contributor to cardiac remodeling after stress. This process is critically joined by and regulated through the mitochondrial danger signal adapter MAVS. This novel complex coordinates remodeling, inflammatory response, and mitochondrial energy metabolism in stressed cardiomyocytes. Thus, Nod1/RIP2/MAVS signaling complex may represent an attractive new therapeutic approach toward heart failure.- Published
- 2020
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24. Management of adult patients with tinnitus: Preparedness, perspectives and practices of audiologists.
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Dawood F, Khan NB, and Bagwandin V
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- Adult, Attitude of Health Personnel, Disease Management, Female, Health Knowledge, Attitudes, Practice, Humans, Male, Practice Patterns, Physicians', South Africa, Surveys and Questionnaires, Tinnitus diagnosis, Audiologists education, Audiologists psychology, Tinnitus therapy
- Abstract
Background: Audiologists, globally, are generally challenged when assessing and creating intervention plans to help patients suffering from tinnitus. Tinnitus is very common among individuals and may significantly affect one's quality of life, especially if not addressed by health care professionals. In South Africa, there seems to be limited published studies regarding the current practices of tinnitus management by audiologists. This is mainly because of limited training and a lack of guidelines and strategies for the management of tinnitus. In particular, some participants reported being unfamiliar on how to approach the identification of tinnitus and difficulty is also encountered when counselling tinnitus patients., Aim: The aim of this study was to describe the preparedness, perspectives and practices of audiologists who manage adult patients with tinnitus., Method: Two hundred and forty-three registered Health Professions Council of South Africa (HPCSA) participants were involved in the study by responding to an electronic questionnaire survey. Data were collected online from Survey Monkey and were exported to Statistical Packages for the Social Sciences (SPSS) (Version 23) for statistical analysis. Data were analysed using descriptive and inferential statistics. Closed-ended questions were analysed within a quantitative framework and thematic analysis for open-ended questions that were descriptively quantified., Results: The results of the study are presented according to the objectives. Approximately 44% of participants (44.3%) disagreed that the undergraduate university training had sufficiently prepared them to manage adult patients with tinnitus. Very few (12.3%) had the opportunity to attend specialist training on how to assess patients with tinnitus. Similarly, only 11.6% received any specialist training with regard to tinnitus intervention. With regard to its overall management, 49.4% felt adequately informed in the assessment of patients with tinnitus, while a further 39.2% rated their experience as being limited with regard to tinnitus intervention. There is no statistical significance relationship between participants' years of experience and tinnitus intervention (p = 0.075). Most participants did not follow any standard guidelines for its management. Some participants (26.8%) reported that further education and training are required in the overall management of patients with tinnitus, while a further 17.7% required training in all areas of tinnitus., Conclusion: The feedback relating to the study suggests that overall management of tinnitus seems to be a challenge among South African audiologists, irrespective of their years of experience. Audiologists in the study perceived that tinnitus services are limited mainly because of a lack of or limited knowledge, training and guidelines, these being affected by contextual restraints.
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- 2019
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25. Standard-Dose Intradermal Influenza Vaccine Elicits Cellular Immune Responses Similar to Those of Intramuscular Vaccine in Men With and Those Without HIV Infection.
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Amoah S, Mishina M, Praphasiri P, Cao W, Kim JH, Liepkalns JS, Guo Z, Carney PJ, Chang JC, Fernandez S, Garg S, Beacham L, Holtz TH, Curlin ME, Dawood F, Olsen SJ, Gangappa S, Stevens J, and Sambhara S
- Subjects
- Adult, Antibodies, Viral immunology, Antibody Formation, B-Lymphocytes immunology, CD4 Lymphocyte Count, CD4-Positive T-Lymphocytes, CD8-Positive T-Lymphocytes, HIV Infections complications, Hemagglutination Inhibition Tests, Hemagglutinin Glycoproteins, Influenza Virus immunology, Humans, Immunoglobulin A, Immunoglobulin G, Influenza A Virus, H1N1 Subtype immunology, Interferon-gamma metabolism, Interleukin-2 metabolism, Male, Middle Aged, Thailand, Tumor Necrosis Factor-alpha metabolism, Vaccination, HIV Infections immunology, Immunity, Cellular immunology, Influenza Vaccines administration & dosage, Influenza Vaccines immunology, Influenza Vaccines standards, Influenza, Human prevention & control
- Abstract
Background: Human immunodeficiency virus (HIV)-infected persons are at a higher risk of severe influenza. Although we have shown that a standard-dose intradermal influenza vaccine versus a standard-dose intramuscular influenza vaccine does not result in differences in hemagglutination-inhibition titers in this population, a comprehensive examination of cell-mediated immune responses remains lacking., Methods: Serological, antigen-specific B-cell, and interleukin 2-, interferon γ-, and tumor necrosis factor α-secreting T-cell responses were assessed in 79 HIV-infected men and 79 HIV-uninfected men., Results: The route of vaccination did not affect the immunoglobulin A and immunoglobulin G (IgG) plasmablast or memory B-cell response, although these were severely impaired in the group with a CD4+ T-cell count of <200 cells/μL. The frequencies of IgG memory B cells measured on day 28 after vaccination were highest in the HIV-uninfected group, followed by the group with a CD4+ T-cell count of ≥200 cells/μL and the group with a CD4+ T-cell count of <200 cells/μL. The route of vaccination did not affect the CD4+ or CD8+ T-cell responses measured at various times after vaccination., Conclusions: The route of vaccination had no effect on antibody responses, antibody avidity, T-cell responses, or B-cell responses in HIV-infected or HIV-uninfected subjects. With the serological and cellular immune responses to influenza vaccination being impaired in HIV-infected individuals with a CD4+ T-cell count of <200 cells/μL, passive immunization strategies need to be explored to protect this population., Clinical Trials Registration: NCT01538940., (Published by Oxford University Press for the Infectious Diseases Society of America 2019.)
- Published
- 2019
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26. A relationship between weak attentional control and cognitive distortions, explained by negative affect.
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Booth RW, Sharma D, Dawood F, Doğan M, Emam HMA, Gönenç SS, Kula NA, Mazıcı B, Saraçyakupoğlu A, and Shahzad AU
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- Adolescent, Adult, Female, Humans, Male, Risk Factors, Students, Turkey, Anxiety psychology, Attentional Bias, Cognition, Depression psychology, Mood Disorders psychology
- Abstract
People high in negative affect (anxiety or depression) show cognitive distortions, specific thinking errors which contribute to the maintenance of their condition. It is thought that weak attentional control is a risk factor for negative affect and emotional disorders, because weak attentional control exaggerates the expression of attentional bias, another cognitive feature of emotional disorders. We wondered whether weak attentional control might similarly exaggerate the expression of cognitive distortions. In two samples of students from Turkey and the UK, we found that weak attentional control was indeed related to cognitive distortions, but this relationship was explained by both variables' relationships with negative affect. This suggests that weak attentional control, while related to negative affect, does not necessarily exaggerate all of its cognitive features. There seems to be a limit on the affective consequences of poor attentional control, which may limit its clinical usefulness as a risk factor for emotional disorders., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2019
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27. Caesarean scar pregnancy in the UK: a national cohort study.
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Harb HM, Knight M, Bottomley C, Overton C, Tobias A, Gallos ID, Shehmar M, Farquharson R, Horne A, Latthe P, Edi-Osagie E, MacLean M, Marston E, Zamora J, Dawood F, Small R, Ross J, Bourne T, Coomarasamy A, and Jurkovic D
- Subjects
- Abortifacient Agents, Nonsteroidal therapeutic use, Cohort Studies, Dilatation and Curettage adverse effects, Female, Humans, Incidence, Live Birth, Methotrexate therapeutic use, Pregnancy, Pregnancy, Ectopic diagnosis, Pregnancy, Ectopic etiology, Treatment Outcome, United Kingdom epidemiology, Watchful Waiting, Cesarean Section adverse effects, Cicatrix complications, Pregnancy, Ectopic epidemiology, Pregnancy, Ectopic therapy
- Abstract
Objective: To estimate the incidence of caesarean scar pregnancy (CSP) and to describe the management outcomes associated with this condition., Design: A national cohort study using the UK Early Pregnancy Surveillance Service (UKEPSS)., Setting: 86 participating Early Pregnancy Units., Population: All women diagnosed in the participating units with CSP between November 2013 and January 2015., Methods: Cohort study of women identified through the UKEPSS monthly mailing system., Main Outcome Measures: Incidence, clinical outcomes and complications., Results: 102 cases of CSP were reported, with an estimated incidence of 1.5 per 10 000 (95% CI 1.1-1.9) maternities. Full outcome data were available for 92 women. Management was expectant in 21/92 (23%), medical in 15/92 (16%) and surgical in 56/92 (61%). The success rates of expectant, medical and surgical management were 43% (9/21), 46% (7/15) and 96% (54/56), respectively. The complication rates were 15/21 (71%) with expectant, 9/15 (60%) with medical and 20/56 (36%) with surgical management. Discharge from care (median number of days) was 82 (range 37-174) with expectant, 21 (range 10-31) with medical and 11 (range 4-49) with surgical management., Conclusions: Surgical management appears to be associated with a high success rate, low complication rate and short post-treatment follow up., Tweetable Abstract: Surgery for CSP appears to be successful, with low complication rates and short post-treatment follow up., (© 2018 Royal College of Obstetricians and Gynaecologists.)
- Published
- 2018
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28. The Role of Liquid Ink Transport in the Direct Placement of Quantum Dot Emitters onto Sub-Micrometer Antennas by Dip-Pen Nanolithography.
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Dawood F, Wang J, Schulze PA, Sheehan CJ, Buck MR, Dennis AM, Majumder S, Krishnamurthy S, Ticknor M, Staude I, Brener I, Goodwin PM, Amro NA, and Hollingsworth JA
- Abstract
Dip-pen nanolithography (DPN) is used to precisely position core/thick-shell ("giant") quantum dots (gQDs; ≥10 nm in diameter) exclusively on top of silicon nanodisk antennas (≈500 nm diameter pillars with a height of ≈200 nm), resulting in periodic arrays of hybrid nanostructures and demonstrating a facile integration strategy toward next-generation quantum light sources. A three-step reading-inking-writing approach is employed, where atomic force microscopy (AFM) images of the pre-patterned substrate topography are used as maps to direct accurate placement of nanocrystals. The DPN "ink" comprises gQDs suspended in a non-aqueous carrier solvent, o-dichlorobenzene. Systematic analyses of factors influencing deposition rate for this non-conventional DPN ink are described for flat substrates and used to establish the conditions required to achieve small (sub-500 nm) feature sizes, namely: dwell time, ink-substrate contact angle and ink volume. Finally, it is shown that the rate of solvent transport controls the feature size in which gQDs are found on the substrate, but also that the number and consistency of nanocrystals deposited depends on the stability of the gQD suspension. Overall, the results lay the groundwork for expanded use of nanocrystal liquid inks and DPN for fabrication of multi-component nanostructures that are challenging to create using traditional lithographic techniques., (© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
- Published
- 2018
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29. Developmental Approach for Behavior Learning Using Primitive Motion Skills.
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Dawood F and Loo CK
- Subjects
- Biomechanical Phenomena, Computer Simulation, Exploratory Behavior, Humans, Markov Chains, Models, Biological, Pattern Recognition, Automated, Posture, Visual Perception, Artificial Intelligence, Imitative Behavior, Learning, Motor Skills, Robotics methods
- Abstract
Imitation learning through self-exploration is essential in developing sensorimotor skills. Most developmental theories emphasize that social interactions, especially understanding of observed actions, could be first achieved through imitation, yet the discussion on the origin of primitive imitative abilities is often neglected, referring instead to the possibility of its innateness. This paper presents a developmental model of imitation learning based on the hypothesis that humanoid robot acquires imitative abilities as induced by sensorimotor associative learning through self-exploration. In designing such learning system, several key issues will be addressed: automatic segmentation of the observed actions into motion primitives using raw images acquired from the camera without requiring any kinematic model; incremental learning of spatio-temporal motion sequences to dynamically generates a topological structure in a self-stabilizing manner; organization of the learned data for easy and efficient retrieval using a dynamic associative memory; and utilizing segmented motion primitives to generate complex behavior by the combining these motion primitives. In our experiment, the self-posture is acquired through observing the image of its own body posture while performing the action in front of a mirror through body babbling. The complete architecture was evaluated by simulation and real robot experiments performed on DARwIn-OP humanoid robot.
- Published
- 2018
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30. Kernel Bayesian ART and ARTMAP.
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Masuyama N, Loo CK, and Dawood F
- Subjects
- Bayes Theorem, Fuzzy Logic, Normal Distribution, Machine Learning standards, Neural Networks, Computer
- Abstract
Adaptive Resonance Theory (ART) is one of the successful approaches to resolving "the plasticity-stability dilemma" in neural networks, and its supervised learning model called ARTMAP is a powerful tool for classification. Among several improvements, such as Fuzzy or Gaussian based models, the state of art model is Bayesian based one, while solving the drawbacks of others. However, it is known that the Bayesian approach for the high dimensional and a large number of data requires high computational cost, and the covariance matrix in likelihood becomes unstable. This paper introduces Kernel Bayesian ART (KBA) and ARTMAP (KBAM) by integrating Kernel Bayes' Rule (KBR) and Correntropy Induced Metric (CIM) to Bayesian ART (BA) and ARTMAP (BAM), respectively, while maintaining the properties of BA and BAM. The kernel frameworks in KBA and KBAM are able to avoid the curse of dimensionality. In addition, the covariance-free Bayesian computation by KBR provides the efficient and stable computational capability to KBA and KBAM. Furthermore, Correntropy-based similarity measurement allows improving the noise reduction ability even in the high dimensional space. The simulation experiments show that KBA performs an outstanding self-organizing capability than BA, and KBAM provides the superior classification ability than BAM, respectively., (Copyright © 2017 Elsevier Ltd. All rights reserved.)
- Published
- 2018
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31. Is subclinical hypothyroidism associated with lower live birth rates in women who have experienced unexplained recurrent miscarriage?
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van Dijk MM, Vissenberg R, Bisschop PH, Dawood F, van Wely M, Goddijn M, and Farquharson RG
- Subjects
- Adolescent, Adult, Cohort Studies, Female, Humans, Hypothyroidism diagnosis, Live Birth, Multivariate Analysis, Pregnancy, Pregnancy Rate, Thyroid Diseases complications, Thyroid Gland physiology, Young Adult, Abortion, Habitual diagnosis, Birth Rate, Hypothyroidism complications
- Abstract
Thyroid disorders have been associated with recurrent miscarriage. Little evidence is available on the influence of subclinical hypothyroidism on live birth rates. In this cohort study, women who had experienced miscarriage and subclinical hypothyroidism (defined as thyroid-stimulating hormone >97.5th percentile mU/l with a normal thyroxine level) were investigated; the control group included women who had experienced recurrent miscarriage and normal thyroid function. Multivariable logistic regression was used to investigate the association of subclinical hypothyroidism. Data were available for 848 women; 20 (2.4%) had subclinical hypothyroidism; 818 women (96%) had euthyroidism; and 10 (1.2%) had overt hypothyroidism. The live birth rate was 45% in women with subclinical hypothyroidism and 52% in euthyroid women (OR 0.69, 95% CI 0.28 to 1.71). The ongoing pregnancy rate was 65% versus 69% (OR 0.82, 95% CI 0.32 to 2.10) and the miscarriage rate was 35% versus 28% (OR 1.43, 95% CI 0.56 to 3.68), respectively. No differences were found when thyroid stimulating hormone 2.5 mU/l was used as cut-off level to define subclinical hypothyroidism. In women with unexplained miscarriage, no differences were found in live birth, ongoing pregnancy and miscarriage rates between women with subclinical hypothyroidism and euthyroid women., (Copyright © 2016. Published by Elsevier Ltd.)
- Published
- 2016
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32. PROMISE: first-trimester progesterone therapy in women with a history of unexplained recurrent miscarriages - a randomised, double-blind, placebo-controlled, international multicentre trial and economic evaluation.
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Coomarasamy A, Williams H, Truchanowicz E, Seed PT, Small R, Quenby S, Gupta P, Dawood F, Koot YE, Atik RB, Bloemenkamp KW, Brady R, Briley A, Cavallaro R, Cheong YC, Chu J, Eapen A, Essex H, Ewies A, Hoek A, Kaaijk EM, Koks CA, Li TC, MacLean M, Mol BW, Moore J, Parrott S, Ross JA, Sharpe L, Stewart J, Trépel D, Vaithilingam N, Farquharson RG, Kilby MD, Khalaf Y, Goddijn M, Regan L, and Rai R
- Subjects
- Administration, Intravaginal, Adolescent, Adult, Congenital Abnormalities epidemiology, Cost-Benefit Analysis, Double-Blind Method, Female, Gestational Age, Humans, Infant, Infant Mortality, Netherlands, Pregnancy, Progesterone administration & dosage, Progesterone adverse effects, Quality-Adjusted Life Years, United Kingdom, Young Adult, Abortion, Habitual drug therapy, Pregnancy Outcome epidemiology, Pregnancy Trimester, First, Progesterone economics, Progesterone therapeutic use
- Abstract
Background and Objectives: Progesterone is essential to maintain a healthy pregnancy. Guidance from the Royal College of Obstetricians and Gynaecologists and a Cochrane review called for a definitive trial to test whether or not progesterone therapy in the first trimester could reduce the risk of miscarriage in women with a history of unexplained recurrent miscarriage (RM). The PROMISE trial was conducted to answer this question. A concurrent cost-effectiveness analysis was conducted., Design and Setting: A randomised, double-blind, placebo-controlled, international multicentre study, with economic evaluation, conducted in hospital settings across the UK (36 sites) and in the Netherlands (nine sites)., Participants and Interventions: Women with unexplained RM (three or more first-trimester losses), aged between 18 and 39 years at randomisation, conceiving naturally and giving informed consent, received either micronised progesterone (Utrogestan(®), Besins Healthcare) at a dose of 400 mg (two vaginal capsules of 200 mg) or placebo vaginal capsules twice daily, administered vaginally from soon after a positive urinary pregnancy test (and no later than 6 weeks of gestation) until 12 completed weeks of gestation (or earlier if the pregnancy ended before 12 weeks)., Main Outcome Measures: Live birth beyond 24 completed weeks of gestation (primary outcome), clinical pregnancy at 6-8 weeks, ongoing pregnancy at 12 weeks, miscarriage, gestation at delivery, neonatal survival at 28 days of life, congenital abnormalities and resource use., Methods: Participants were randomised after confirmation of pregnancy. Randomisation was performed online via a secure internet facility. Data were collected on four occasions of outcome assessment after randomisation, up to 28 days after birth., Results: A total of 1568 participants were screened for eligibility. Of the 836 women randomised between 2010 and 2013, 404 received progesterone and 432 received placebo. The baseline data (age, body mass index, maternal ethnicity, smoking status and parity) of the participants were comparable in the two arms of the trial. The follow-up rate to primary outcome was 826 out of 836 (98.8%). The live birth rate in the progesterone group was 65.8% (262/398) and in the placebo group it was 63.3% (271/428), giving a relative risk of 1.04 (95% confidence interval 0.94 to 1.15; p = 0.45). There was no evidence of a significant difference between the groups for any of the secondary outcomes. Economic analysis suggested a favourable incremental cost-effectiveness ratio for decision-making but wide confidence intervals indicated a high level of uncertainty in the health benefits. Additional sensitivity analysis suggested the probability that progesterone would fall within the National Institute for Health and Care Excellence's threshold of £20,000-30,000 per quality-adjusted life-year as between 0.7145 and 0.7341., Conclusions: There is no evidence that first-trimester progesterone therapy improves outcomes in women with a history of unexplained RM., Limitations: This study did not explore the effect of treatment with other progesterone preparations or treatment during the luteal phase of the menstrual cycle., Future Work: Future research could explore the efficacy of progesterone supplementation administered during the luteal phase of the menstrual cycle in women attempting natural conception despite a history of RM., Trial Registration: Current Controlled Trials ISRCTN92644181; EudraCT 2009-011208-42; Research Ethics Committee 09/H1208/44., Funding: This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 20, No. 41. See the NIHR Journals Library website for further project information.
- Published
- 2016
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33. Correction: View-Invariant Visuomotor Processing in Computational Mirror Neuron System for Humanoid.
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Dawood F and Loo CK
- Abstract
[This corrects the article DOI: 10.1371/journal.pone.0152003.].
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- 2016
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34. Transabdominal cerclage: preconceptual versus first trimester insertion.
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Dawood F and Farquharson RG
- Subjects
- Adult, Female, Humans, Pregnancy, Pregnancy Outcome, Prospective Studies, Retrospective Studies, Time Factors, Young Adult, Cerclage, Cervical methods, Obstetric Labor, Premature prevention & control, Pregnancy Trimester, First, Premature Birth prevention & control, Uterine Cervical Incompetence surgery
- Abstract
Objective: Transabdominal cerclage (TAC) is an effective intervention to prevent spontaneous mid-trimester loss and preterm delivery when a transvaginal cerclage has failed. A TAC may be inserted during the first trimester of pregnancy or preconceptually. The objective of this study was to determine whether or not preconceptual transabdominal cerclage (TAC) confers any benefit over first trimester TAC insertion in terms of associated surgical and pregnancy-related morbidity and subsequent pregnancy outcome., Study Design: This was a retrospective and prospective cohort study of 161 consecutive women who underwent preconceptual (PC) TAC versus first trimester (T1) TAC over a 22-year period from January 1993 to January 2015 at a tertiary referral miscarriage clinic. Data was obtained from case note review retrospectively from 1993 to 2006 and prospectively between 2006 and 2015. Inclusion criteria comprised a history of at least one previous spontaneous mid-trimester loss coupled with at least one failed transvaginal cerclage and screening for antiphospholipid syndrome and bacterial vaginosis. Of 144 patients who conceived, 121 had complete pregnancy outcomes; 62 in the preconceptual group and 59 in the first trimester group. Both groups had similar previous pregnancy losses and previous transvaginal cerclage history., Results: Successful pregnancies >24 weeks occurred in 97% of PC TACs compared to 93% in the T1 group. Furthermore, a successful pregnancy >34 weeks occurred in 90% (56/62) in the PC group compared to 74% (44/59) in the T1 group (OR 3.18; CI 1.14-8.8). Significantly fewer patients needed emergency caesarean section for preterm delivery in the PC group (7/62 (12%) versus 21/59 (36%); OR 4.34; CI 1.68-11.32). All 6 failures before 24 weeks gestation (T1=4, PC=2) were associated with antiphospholipid syndrome or bacterial vaginosis. In the T1 group 3/65 (5%) of patients suffered serious surgical complications and haemorrhage >500mls occurred in 32/65(50%) of cases whereas no surgical complications occurred in the PC group., Conclusions: Preconceptual TAC is more successful in preventing repeat spontaneous mid-trimester loss and preterm labour, and is associated with less surgical and pregnancy-related morbidity compared to first trimester TAC insertion., (Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.)
- Published
- 2016
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35. View-Invariant Visuomotor Processing in Computational Mirror Neuron System for Humanoid.
- Author
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Dawood F and Loo CK
- Subjects
- Algorithms, Animals, Computer Simulation, Learning, Macaca mulatta, Markov Chains, Motion, Mirror Neurons physiology, Motor Cortex physiology, Motor Neurons physiology
- Abstract
Mirror neurons are visuo-motor neurons found in primates and thought to be significant for imitation learning. The proposition that mirror neurons result from associative learning while the neonate observes his own actions has received noteworthy empirical support. Self-exploration is regarded as a procedure by which infants become perceptually observant to their own body and engage in a perceptual communication with themselves. We assume that crude sense of self is the prerequisite for social interaction. However, the contribution of mirror neurons in encoding the perspective from which the motor acts of others are seen have not been addressed in relation to humanoid robots. In this paper we present a computational model for development of mirror neuron system for humanoid based on the hypothesis that infants acquire MNS by sensorimotor associative learning through self-exploration capable of sustaining early imitation skills. The purpose of our proposed model is to take into account the view-dependency of neurons as a probable outcome of the associative connectivity between motor and visual information. In our experiment, a humanoid robot stands in front of a mirror (represented through self-image using camera) in order to obtain the associative relationship between his own motor generated actions and his own visual body-image. In the learning process the network first forms mapping from each motor representation onto visual representation from the self-exploratory perspective. Afterwards, the representation of the motor commands is learned to be associated with all possible visual perspectives. The complete architecture was evaluated by simulation experiments performed on DARwIn-OP humanoid robot.
- Published
- 2016
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36. Association of Asymptomatic Bradycardia With Incident Cardiovascular Disease and Mortality: The Multi-Ethnic Study of Atherosclerosis (MESA).
- Author
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Dharod A, Soliman EZ, Dawood F, Chen H, Shea S, Nazarian S, and Bertoni AG
- Subjects
- Aged, Aged, 80 and over, Asymptomatic Diseases epidemiology, Atherosclerosis epidemiology, Ethnicity statistics & numerical data, Female, Humans, Incidence, Male, Middle Aged, Retrospective Studies, Risk Factors, United States epidemiology, Bradycardia epidemiology, Mortality
- Abstract
Importance: Bradycardia has been associated with lower cardiovascular disease (CVD) risk in selected populations. There is a paucity of information available about heart rate (HR) less than 50 beats per minute (bpm) among middle-aged or older adults., Objective: To determine whether asymptomatic bradycardia was associated with a lower cardiovascular risk profile, less subclinical atherosclerosis, and decreased incident CVD and mortality., Design, Setting, and Participants: This retrospective analysis includes 6733 participants of the Multi-Ethnic Study of Atherosclerosis, which recruited men and women free of clinical cardiovascular disease ages 45 to 84 years from 2000 to 2002 and followed them over 10 years for incident CVD events and mortality. The HR was measured by baseline electrocardiogram. The analysis was performed in June 2014., Main Outcomes and Measures: The association between HR categories with CVD events and all-cause mortality were examined using Cox proportional hazards models adjusted for potential confounders and mediators., Results: The 6733 participants had a mean (SD) age of 62 (10.2) years; 47% were male. The mean (SD) HR was 63 (9.5) bpm among the 5831 participants not taking an HR-modifying drug; 5.3% had an HR lower than 50 bpm. Preliminary results revealed significant interaction for HR categories according to use of HR-modifying drugs for mortality (P = .002); thus, all further analyses were stratified. An HR of less than 50 bpm was not associated with incident CVD in either subgroup (participants taking or not taking HR-modifying drugs). Among participants not taking HR-modifying drugs, the fully adjusted mortality risk was not different for an HR less than 50 bpm (hazard ratio, 0.71 [95% CI, 0.41-1.09]; P = .12) and increased among those with an HR greater than 80 bpm (hazard ratio, 1.49 [95% CI, 1.08-2.05]; P = .01) (reference HR, 60-69 bpm). Among the 902 participants taking HR-modifying drugs there was an elevated mortality risk associated with an HR less than 50 bpm (hazard ratio, 2.42 [95% CI, 1.39-4.20]; P = .002) and with an HR greater than 80 bpm (hazard ratio, 3.55 [95% CI, 1.65-7.65]; P = .001) (reference HR, 60-69 bpm)., Conclusions and Relevance: In a contemporary, community-based cohort, bradycardia was generally not associated with incident CVD or mortality except for a potential adverse association between bradycardia among those taking HR-modifying drugs.
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- 2016
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37. Epidemiology of acute respiratory infections in children - preliminary results of a cohort in a rural north Indian community.
- Author
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Krishnan A, Amarchand R, Gupta V, Lafond KE, Suliankatchi RA, Saha S, Rai S, Misra P, Purakayastha DR, Wahi A, Sreenivas V, Kapil A, Dawood F, Pandav CS, Broor S, Kapoor SK, Lal R, and Widdowson MA
- Subjects
- Acute Disease, Child, Child, Preschool, Cohort Studies, Female, Hospitalization statistics & numerical data, Humans, India epidemiology, Infant, Infant, Newborn, Male, Pneumonia prevention & control, Respiratory Tract Infections diagnosis, Respiratory Tract Infections etiology, Rural Population, Respiratory Tract Infections epidemiology
- Abstract
Background: Despite acute respiratory infections being a major cause of death among children in developing countries including India, there is a lack of community-based studies that document its burden and aetiology., Methods: A dynamic cohort of children aged 0-10 years was established in four villages in a north Indian state of Haryana from August 2012 onwards. Trained health workers conducted weekly home visits to screen children for acute respiratory infection (ARI) defined as one of the following: cough, sore throat, nasal congestion, earache/discharge, or breathing difficulty. Nurses clinically assessed these children to grade disease severity based on standard age-specific guidelines into acute upper or lower respiratory infection (AURI or ALRI) and collected nasal/throat swabs for pathogen testing., Results: Our first year results show that ARI incidence in 0-10 years of age was 5.9 (5.8-6.0) per child-year with minimal gender difference, the ALRI incidence in the under-five age group was higher among boys (0.43; 0.39-0.49) as compared to girls (0.31; 0.26-0.35) per child year. Boys had 2.4 times higher ARI-related hospitalization rate as compared to girls., Conclusion: ARI impose a significant burden on the children of this cohort. This study platform aims to provide better evidence for prevention and control of pneumonia in developing countries.
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- 2015
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38. Utility of Nontraditional Risk Markers in Individuals Ineligible for Statin Therapy According to the 2013 American College of Cardiology/American Heart Association Cholesterol Guidelines.
- Author
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Yeboah J, Polonsky TS, Young R, McClelland RL, Delaney JC, Dawood F, Blaha MJ, Miedema MD, Sibley CT, Carr JJ, Burke GL, Goff DC Jr, Psaty BM, Greenland P, and Herrington DM
- Subjects
- Aged, Aged, 80 and over, Atherosclerosis diagnosis, Atherosclerosis epidemiology, Biomarkers blood, Cohort Studies, Female, Humans, Male, Middle Aged, Prospective Studies, Risk Factors, United States epidemiology, American Heart Association, Atherosclerosis blood, Cardiology standards, Cholesterol blood, Hydroxymethylglutaryl-CoA Reductase Inhibitors therapeutic use, Practice Guidelines as Topic standards
- Abstract
Background: In the general population, the majority of cardiovascular events occur in people at the low to moderate end of population risk distribution. The 2013 American College of Cardiology/American Heart Association guideline on the treatment of blood cholesterol recommends consideration of statin therapy for adults with an estimated 10-year atherosclerotic cardiovascular disease (ASCVD) risk ≥7.5% based on traditional risk factors. Whether use of nontraditional risk markers can improve risk assessment in those below this threshold for statin therapy is unclear., Methods and Results: Using data from the Multi-Ethnic Study of Atherosclerosis (MESA), a population sample free of clinical CVD at baseline, we calibrated the Pooled Cohort Equations (cPCE). ASCVD was defined as myocardial infarction, coronary heart disease death, or fatal or nonfatal stroke. Adults with an initial cPCE <7.5% and elevated levels of additional risk markers (abnormal test) whose new calculated risk was ≥7.5% were considered statin eligible: low-density lipoprotein cholesterol ≥160 mg/dL; family history of ASCVD; high-sensitivity C-reactive protein ≥2 mg/dL; coronary artery calcium score ≥300 Agatston units or ≥75th percentile for age, sex, and ethnicity; and ankle-brachial index <0.9. We compared the absolute and relative ASCVD risks among those with versus without elevated posttest estimated risk. We calculated the number needed to screen to identify 1 person with abnormal test for each risk marker, defined as the number of participants with baseline cPCE risk <7.5% divided by the number with an abnormal test reclassified as statin eligible. Of 5185 participants not taking statins with complete data (age, 45-84 years), 4185 had a cPCE risk <7.5%. During 10 years of follow-up, 57% of the ASCVD events (183 of 320) occurred among adults with a cPCE risk <7.5%. When people with diabetes mellitus were excluded, the coronary artery calcium criterion reclassified 6.8% upward, with an event rate of 13.3%, absolute risk of 10%, relative risk of 4.0 (95% confidence interval [CI], 2.8-5.7), and number needed to screen of 14.7. The corresponding numbers for family history of ASCVD were 4.6%, 15.1%, 12%, 4.3 (95% CI, 3.0-6.4), and 21.8; for high-sensitivity C-reactive protein criteria, 2.6%, 10%, 6%, 2.6 (95% CI, 1.4-4.8), and 39.2; for ankle-brachial index criteria, 0.6%, 9%, 5%, 2.3 (95% CI, 0.6-8.6), and 176.5; and for low-density lipoprotein cholesterol criteria, 0.5%, 5%, 1%, 1.2 (95% CI, 0.2-8.4), and 193.3, respectively. Of the 3882 with <7.5% cPCE risk, 431 (11.1%) were reclassified to ≥7.5% (statin eligible) by at least 1 of the additional risk marker criteria., Conclusions: In this generally low-risk population sample, a large proportion of ASCVD events occurred among adults with a 10-year cPCE risk <7.5%. We found that the coronary artery calcium score, high-sensitivity C-reactive protein, family history of ASCVD, and ankle-brachial index recommendations by the American College of Cardiology/American Heart Association cholesterol guidelines (Class IIB) identify small subgroups of asymptomatic population with a 10-year cPCE risk <7.5% but with observed ASCVD event rates >7.5% who may warrant statin therapy considerations., (© 2015 American Heart Association, Inc.)
- Published
- 2015
- Full Text
- View/download PDF
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