98 results on '"Lo, T‐K"'
Search Results
2. Management of overactive bladder: consensus statements from the Hong Kong Urological Association and the Hong Kong Geriatrics Society.
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Wong, William K. K., Kan, Raymond W. M., Lam, P. S., Cheung, Phoebe M. H., Cheng, Elaine Y. L., Pun, Terrilyn C. T., Tang, Maria W. S., Leung, Clarence L. H., Woo, Sandy W. S., Lo, T. K., Chu, Peggy S. K., Chan, Tony N. H., and Chiu, Peter K. F.
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- 2024
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3. Long-term health care use and diagnosis after hospitalization for COVID-19: a retrospective matched cohort study.
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Lo, T. K. T., MacMillan, Andrew, Oudit, Gavin Y., Usman, Hussain, Cabaj, Jason L., MacDonald, Judy, Saini, Vineet, and Sikdar, Khokan C.
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MEDICAL care use , *LONG-term health care , *PHYSICIAN services utilization , *COVID-19 , *HOSPITAL care , *HEALTH behavior - Abstract
Background: Knowledge pertaining to the health and health care utilization of patients after recovery from acute COVID-19 is limited. We sought to assess the frequency of new diagnoses of disease and health care use after hospitalization with COVID-19. Methods: We included all patients hospitalized with COVID-19 in Alberta between Mar. 5 and Dec. 31, 2020. Additionally, 2 matched controls (SARS-CoV-2 negative) per case were included and followed up until Apr. 30, 2021. New diagnoses and health care use were identified from linked administrative health data. Repeated measures were made for the periods 1-30 days, 31-60 days, 61-90 days, 91-180 days, and 180 and more days from the index date. We used multivariable regression analysis to evaluate the association of COVID-19-related hospitalization with the number of physician visits during follow-up. Results: The study sample included 3397 cases and 6658 controls. Within the first 30 days of follow-up, the case group had 37.12% (95% confidence interval [CI] 35.44% to 38.80%) more patients with physician visits, 11.12% (95% CI 9.77% to 12.46%) more patients with emergency department visits and 2.92% (95% CI 2.08% to 3.76%) more patients with hospital admissions than the control group. New diagnoses involving multiple organ systems were more common in the case group. Regression results indicated that recovering from COVID-19-related hospitalization, admission to an intensive care unit, older age, greater number of comorbidities and more prior health care use were associated with increased physician visits. Interpretation: Patients recovered from the acute phase of COVID-19 continued to have greater health care use up to 6 months after hospital discharge. Research is required to further explore the effect of post-COVID-19 conditions, pre-existing health conditions and health-seeking behaviours on health care use. [ABSTRACT FROM AUTHOR]
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- 2023
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4. Womenʼs preference for non‐invasive prenatal DNA testing versus chromosomal microarray after screening for Down syndrome: a prospective study
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Cheng, YKY, Leung, WC, Leung, TY, Choy, KW, Chiu, RWK, Lo, T‐K, Kwok, KY, and Sahota, DS
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- 2018
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5. Handwriting Characteristics among Secondary Students with and without Physical Disabilities: A Study with a Computerized Tool
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Li-Tsang, Cecilia W. P., Au, Ricky K. C., Chan, Michelle H. Y., Chan, Lily W. L., Lau, Gloria M. T., Lo, T. K., and Leung, Howard W. H.
- Abstract
The purpose of the present study was to investigate the handwriting characteristics of secondary school students with and without physical disabilities (PD). With the use of a computerized Chinese Handwriting Assessment Tool (CHAT), it was made possible to objectively assess and analyze in detail the handwriting characteristics of individual students. Fifty participants (age range: 15-19-years-old) were recruited from one mainstream secondary school and 20 participants (age range: 17-24-years-old) were recruited from two secondary schools for students with PD. They were asked to perform three consecutive handwriting tasks: copying 90 characters using the computerized CHAT, an English passage copying task, and a Chinese passage copying task. The data indicated that students with PD were significantly slower in copying both Chinese and English characters in passages when compared to the typical students. Significant differences in the measures of writing speed, air/ground time ratio, standard deviation of speed, standard deviation of size per character, and number of stroke errors measured by the CHAT were found between the two groups of students. Further analysis on the data of typical students indicated no significant difference in handwriting speed among students of different classes (i.e. arts or science) on copying Chinese and English passages, and on individual Chinese words (from CHAT). The academic results of students also showed no significant correlation with their handwriting speed measured by the three writing tasks. To conclude, the CHAT system was able to identify a number of characteristics of handwriting on students with and without PD. It was suggested that the CHAT should further be developed into an objective evaluation tool to explore the handwriting characteristics of the students with a wider range of disabilities in the future, and to make recommendations to arrange special examination arrangements (SEA) for students with physical disabilities or other special needs. (Contains 3 tables and 3 figures.)
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- 2011
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6. Additional file 4 of Reporting unit context data to stakeholders in long-term care: a practical approach
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Cranley, Lisa A., Lo, T K T, Weeks, Lori E., Hoben, Matthias, Ginsburg, Liane R., Doupe, Malcolm, Anderson, Ruth A., Wagg, Adrian, Boström, Anne-Marie, Estabrooks, Carole A., and Norton, Peter G.
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Additional file 4. Regression analysis- full models. Provides details of full models of associations between context rank summary scores and outcomes (Table 4) and associations between binary scores and outcomes (Table 5).
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- 2022
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7. Additional file 3 of Reporting unit context data to stakeholders in long-term care: a practical approach
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Cranley, Lisa A., Lo, T K T, Weeks, Lori E., Hoben, Matthias, Ginsburg, Liane R., Doupe, Malcolm, Anderson, Ruth A., Wagg, Adrian, Boström, Anne-Marie, Estabrooks, Carole A., and Norton, Peter G.
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Additional file 3. Focus group question guide. A semi-structured focus group guide used with nursing home leaders.
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- 2022
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8. Additional file 2 of Reporting unit context data to stakeholders in long-term care: a practical approach
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Cranley, Lisa A., Lo, T K T, Weeks, Lori E., Hoben, Matthias, Ginsburg, Liane R., Doupe, Malcolm, Anderson, Ruth A., Wagg, Adrian, Boström, Anne-Marie, Estabrooks, Carole A., and Norton, Peter G.
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Additional file 2. COREQ Checklist. A completed checklist for reporting qualitative research using focus groups.
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- 2022
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9. Additional file 1 of Reporting unit context data to stakeholders in long-term care: a practical approach
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Cranley, Lisa A., Lo, T K T, Weeks, Lori E., Hoben, Matthias, Ginsburg, Liane R., Doupe, Malcolm, Anderson, Ruth A., Wagg, Adrian, Boström, Anne-Marie, Estabrooks, Carole A., and Norton, Peter G.
- Abstract
Additional file 1. Worked examples of binary and context rank methods. An example of development of the binary method and context rank method.
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- 2022
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10. Scalloping of placenta–myometrium interface on ultrasound in case with myomectomy scar
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Lo, T.-K., Lam, C. H.-L., Cheung, K.-W., Ng, G. H.-T., and Wu, A. K.-P.
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- 2016
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11. Vaginal delivery of second twins: factors predictive of failure and adverse perinatal outcomes.
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Mok, S. L. and Lo, T. K.
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- 2022
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12. Relationship between viral load, infection‐to‐delivery interval and mother‐to‐child transfer of anti‐SARS‐CoV ‐2 antibodies
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Poon, L. C., primary, Leung, B. W., additional, Ma, T., additional, Yu, F. N. Y., additional, Kong, C. W., additional, Lo, T. K., additional, So, P. L., additional, Leung, W. C., additional, Shu, W., additional, Cheung, K. W., additional, Moungmaithong, S., additional, and Wang, C. C., additional
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- 2021
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13. Making Quality Improvement Data Meaningful for Long-Term Care Administrators
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Cranley, Lisa, primary, Weeks, Lori, additional, Lo, T K T (Thomas), additional, Norton, Peter, additional, and Estabrooks, Carole, additional
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- 2020
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14. Non-visualisation of fetal gallbladder in a Chinese cohort.
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Ting, Y. H., So, P. L., Cheung, K. W., Lo, T. K., Ma, T. W. L., and Leung, T. Y.
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- 2022
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15. Transvesical injection to treat Cesarean scar pregnancy
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Lo, T. K., primary, So, C. H., additional, and Mok, S. L., additional
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- 2020
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16. Androgenetic alopecia is associated with increased scalp hardness
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Chen, K.‐Y., primary, Lin, S.‐H., additional, Cheng, S.‐Y., additional, Lo, T.‐K., additional, Huang, H.‐Y., additional, Tang, M.‐J., additional, and Yang, C.‐C., additional
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- 2020
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17. Screening options for Down syndrome: how women choose in real clinical setting
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Lo, T. K., Lai, F. K., Leung, W. C., Lau, W. L., Ng, L. S., Wong, W. C., Tam, S. S., Yee, Y. C., Choi, H., Lam, H. S. W., Sham, A. S. Y., Tang, L. C. H., and Chin, R. K. H.
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- 2009
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18. The effect of gestational age on the outcome of second-trimester termination of pregnancies for foetal abnormalities
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Lo, T. K., Lau, W. L., Lai, F. K., Lam, H., Tse, H. Y., Leung, W. C., and Chin, R. K. H.
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- 2008
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19. Importance of clinical educators to research use and suggestions for better efficiency and effectiveness: results of a cross-sectional survey of care aides in Canadian long-term care facilities
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Lo, T K T, primary, Hoben, Matthias, additional, Norton, Peter G, additional, Teare, Gary F, additional, and Estabrooks, Carole A, additional
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- 2018
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20. Two IUGR foetuses with maternal uniparental disomy of chromosome 6 or UPD(6)mat
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Leung, Wing Cheong, primary, Lau, Wai Lam, additional, Lo, T. K., additional, Lau, Tze Kin, additional, Lam, Y. Y., additional, Kan, Anita, additional, Chan, Kelvin, additional, Lau, Elizabeth T., additional, and Tang, Mary H., additional
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- 2016
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21. Discordance between self-reported arthritis and musculoskeletal signs and symptoms in older women.
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Lo, T. K. T., Parkinson, Lynne, Cunich, Michelle, and Byles, Julie
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ARTHRITIS , *SELF-evaluation , *GERIATRICS , *HEALTH of older women , *HEALTH surveys - Abstract
Background: Arthritis is a gendered disease where women have a higher prevalence and more disability than men with arthritis of the same age. Health survey data is a major source of information for monitoring of the burden of arthritis. The validity of self-reported arthritis and the determinants of its accuracy among women have not been thoroughly studied. The objectives of this study were to: 1) examine the agreement between self-report diagnosed arthritis and musculoskeletal signs and symptoms in community-living older women; 2) estimate the sensitivity, specificity, and predictive values of self-reported arthritis; and 3) assess the factors associated with the disagreement. Methods: A cross-sectional survey of women was undertaken in 2012-13. The health survey asked women about diagnosed arthritis and musculoskeletal signs and symptoms. Agreement between self-reported arthritis and musculoskeletal signs symptoms was measured by Cohen's kappa. Sensitivity, specificity, and predictive values of self-reported arthritis were estimated using musculoskeletal signs and symptoms as the reference standard. Factors associated with disagreement between self-reported arthritis and the reference standard were examined using multiple logistic regression. Results: There were 223 participants self-reported arthritis and 347 did not. A greater number of participants who self-reported arthritis were obese compared to those who did not report arthritis. Those who reported arthritis had worse health, physical functioning, and arthritis symptom measures. Among the 570 participants, 198 had musculoskeletal signs and symptoms suggesting arthritis (the reference standard). Agreement between selfreported arthritis and the reference standard was moderate (kappa = 0.41). Sensitivity, specificity, and positive and negative predictive values of self-reported arthritis in older women were 66.7, 75.5, 59.2, and 81.0% respectively. Regression analysis results indicated that false-positive is associated with better health measured by the Short Form 36 physical summary score, the Health Assessment Questionnaire disability index, or the Western Ontario and McMaster University Osteoarthritis Index total score; whereas false-negative is negatively associated with these variables. Conclusion: While some women who reported diagnosed arthritis did not have recent musculoskeletal signs or symptoms, others with the signs and symptoms did not report diagnosed arthritis. Researchers should use caution when employing self-reported arthritis as the case-definition in epidemiological studies. [ABSTRACT FROM AUTHOR]
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- 2016
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22. The Prevalence and Cross-Sectional Associations of Neuropathic-like Pain Among Older, Community-Dwelling Women with Arthritis.
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de Luca, Katie E., Parkinson, Lynne, Byles, Julie E., Lo, T. K. T., Pollard, Henry P., and Blyth, Fiona M.
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ARTHRITIS ,CHI-squared test ,CONFIDENCE intervals ,HEALTH surveys ,RESEARCH methodology ,NEURALGIA ,PAIN ,POSTAL service ,QUESTIONNAIRES ,RESEARCH funding ,STATISTICAL sampling ,SELF-evaluation ,STATISTICS ,T-test (Statistics) ,MULTIPLE regression analysis ,MCGILL Pain Questionnaire ,PAIN measurement ,BODY mass index ,INDEPENDENT living ,CROSS-sectional method ,SEVERITY of illness index ,DESCRIPTIVE statistics ,ODDS ratio ,MANN Whitney U Test - Abstract
Objective. To estimate the prevalence and examine the associations of neuropathic-like pain in a community-based sample of older Australian women with arthritis. Design. Population based cross-sectional survey. Setting. Participants were recruited from the 1946-1951 cohort of the Australian Longitudinal Study of Women's Health. Subjects. Women with self-reported arthritis (n = 147). Methods. Primary outcome measure was self-reported neuropathic-like pain, defined as scores ≥12 via the pain DETECT screening tool. Descriptive statistics summarized health and socio-demographic characteristics, and comparisons made using student's t-test or Wilcoxon Rank Sum test, and Chi-square tests. Independent health and demographic variables were examined by univariable logistic regression, and significant variables included in multiple variable logistic regression modelling. Results. Thirty-nine women (26.5%) were screened as having neuropathic-like pain. Women with neuropathic-like pain were more likely to have poorer health, worse pain, higher pain catastrophizing, more fatigue, and more depression than women with nociceptive pain. Neuropathic-like pain was significantly associated with higher scores on the SF-MPQ sensory scale and pain catastrophizing scale, and with more medication use. Conclusions. Neuropathic-like pain in women with arthritis was common and is associated with greater disability and poorer quality of life. [ABSTRACT FROM AUTHOR]
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- 2016
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23. Cost of arthritis: a systematic review of methodologies used for direct costs.
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Lo, TKT, Parkinson, Lynne, Cunich, Michelle, Byles, Julie, and Lo, T K T
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TREATMENT of arthritis ,ARTHRITIS ,ECONOMIC aspects of diseases ,MEDICAL care ,MEDICAL care costs ,SYSTEMATIC reviews ,ECONOMICS - Abstract
A substantial amount of healthcare and costs are attributable to arthritis, which is a very common chronic disease. This paper presents the results of a systematic review of arthritis cost studies published from 2008 to 2013. MEDLINE, Embase, EconLit databases were searched, as well as governmental and nongovernmental organization websites. Seventy-one reports met the inclusion/exclusion criteria, and 24 studies were included in the review. Among these studies, common methods included the use of individual-level data, bottom-up costing approach, use of both an arthritis group and a control group to enable incremental cost computation of the disease, and use of regression methods such as generalized linear models and ordinary least squares regression to control for confounding variables. Estimates of the healthcare cost of arthritis varied considerably across the studies depending on the study methods, the form of arthritis and the population studied. In the USA, for example, the estimated healthcare cost of arthritis ranged from $1862 to $14,021 per person, per year. The reviewed study methods have strengths, weaknesses and potential improvements in relation to estimating the cost of disease, which are outlined in this paper. Caution must be exercised when these methods are applied to cost estimation and monitoring of the economic burden of arthritis. [ABSTRACT FROM PUBLISHER]
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- 2016
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24. Effect of fetal diagnosis on the outcomes of second-trimester pregnancy termination for fetal abnormalities: A pilot study
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Lo, T. K., primary, Lau, W. L., additional, Lai, F. K., additional, Lam, H. S.W., additional, Tse, H. Y., additional, Leung, W. C., additional, and Chin, R. K.H., additional
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- 2008
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25. Factors associated with higher healthcare costs in individuals living with arthritis: evidence from the quantile regression approach.
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Lo, TKT, Parkinson, Lynne, Cunich, Michelle, Byles, Julie, and Lo, T K T
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TREATMENT of arthritis ,ARTHRITIS ,MEDICAL care costs ,REGRESSION analysis ,CROSS-sectional method ,ECONOMICS - Abstract
Objective: To examine the factors associated with higher healthcare cost in women with arthritis, using generalized linear models (GLMs) and quantile regression (QR).Methods: This is a cross-sectional healthcare cost study of individuals with arthritis that focused on older Australian women. Cost data were drawn from the Medicare Australia datasets.Results: GLM results show that healthcare cost was significantly associated with various socio-demographic and health factors. Although QR analysis results show the same direction of association between these factors and healthcare cost as in the GLMs, they indicate progressively increased effect sizes at the 50th, 75th, 90th and 95th percentiles.Conclusion: Findings suggest traditional regression models such as GLMs that assume a single rate of change to accurately describe the relationships between explanatory variables and healthcare costs across the entire distribution of cost can produce biased results. QR should be considered in future healthcare cost research. [ABSTRACT FROM AUTHOR]- Published
- 2015
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26. Probe-fed microstrip antennas loaded with very high-permittivity ceramics
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Hwang, Y., primary, Zhang, Y. P., additional, and Lo, T. K., additional
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- 2006
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27. Planar inverted-F antennas loaded with very high permittivity ceramics
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Hwang, Y., primary, Zhang, Y. P., additional, and Lo, T. K., additional
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- 2004
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28. Aperture-coupled microstrip antennas loaded with very high permittivity ceramics
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Hwang, Y., primary, Zhang, Y. P., additional, and Lo, T. K., additional
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- 2003
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29. Two IUGR foetuses with maternal uniparental disomy of chromosome 6 or UPD(6)mat.
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Leung, Wing Cheong, Lau, Wai Lam, Lo, T. K., Lau, Tze Kin, Lam, Y. Y., Kan, Anita, Chan, Kelvin, Lau, Elizabeth T., and Tang, Mary H.
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CHROMOSOMES ,FETAL development - Abstract
The article presents a case study of a 36-year-old woman who was in her first pregnancy. The patient was found to have high concentration of chromosome 6 using a maternal plasma foetal DNA test. A caesarean section was also performed at 34 weeks due to the suboptimal foetal growth with oligohydramnios.
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- 2017
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30. Theoretical study of impact localisation limits in tangible acoustic interface applications.
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Lo, T. K. C. and So, H. C.
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ACOUSTICAL engineering , *ELECTRONICS , *HYPERBOLIC groups , *GROUP theory , *ACOUSTIC imaging - Abstract
Tangible acoustic interface (TAI), the key concept of which is to convert any touchable objects into natural interactive surfaces, is an innovative and exciting idea in human–computer interaction. A key challenge for its development is to accurately locate the tactile interactions. In this reported work, the Cramér-Rao lower bound is utilised to study the theoretical limits of impact localisation using the hyperbolic positioning approach in TAI applications. [ABSTRACT FROM AUTHOR]
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- 2009
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31. Anticholinergic burden in older women: not seeing the wood for the trees?
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Parkinson, L., Magin, P. J., Thomson, A., Byles, J. E., Caughey, G. E., Etherton-Beer, C., Gnjidic, D., Hilmer, S. N., Lo, T. K., Mccowan, C., Rachael Moorin, and Pond, C. D.
32. Decay Kinetics of Electron-Hole-Drop and Free-Exciton Luminescence in Ge: Evidence for Large Drops
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Westervelt, R. M., primary, Lo, T. K., additional, Staehli, J. L., additional, and Jeffries, C. D., additional
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- 1974
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33. Proposed molecular test of local hidden-variables theories
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Lo, T. K., primary and Shimony, A., additional
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- 1981
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34. The Preparedness of Hong Kong Medical Students towards Advance Directives and End-of-life Issues.
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Siu, M. W., Cheung, T. Y., Chiu, M. M., Kwok, T. Y., Choi, W. L., Lo, T. K., Ting, W. M., Yu, P. H., Cheung, C. Y., Wong, J. G., and Chua, S. E.
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MEDICAL students , *PREPAREDNESS , *ADVANCE directives (Medical care) , *TERMINAL care - Abstract
Objectives: To explore the preparedness of medical students towards advance directives and related end-of-life issues, and to examine background factors such as knowledge, attitudes, and experience concerning advance directives and related end-of-life issues. Methods: In 2007, 448 medical students in years 3 to 5 were surveyed at the Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong. Their knowledge, attitudes, and experiences of advance directives and related end-of-life issues, and their self-perceived preparedness to discuss these matters with patients were evaluated. Results: A total of 220 (49%) of the eligible students responded, of whom 79% supported the use of advance directives. Only 65 (30%) students were certain of what advance directives meant and 198 (90%) students felt that their knowledge of advance directives was inadequate. Also, 197 (90%) students felt unprepared about advance directives and end-of-life issues. Factors associated with positive attitude towards advance directives included religion and knowledge. No factors were found to be associated with self-perceived preparedness towards advance directives or end-of-life issues. Conclusions: Most of the medical students surveyed demonstrated a positive attitude towards advance directives and recognised the importance of advance directives. However, they felt that they were unprepared and lacking in knowledge and experience of advance directives and end-of-life issues. Wider range and more depth of education is needed to better equip medical students for future practice. [ABSTRACT FROM AUTHOR]
- Published
- 2010
35. Hong Kong Geriatrics Society and Hong Kong Urological Association consensus on personalised management of male lower urinary tract symptoms in the era of multiple co-morbidities and polypharmacy.
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Chu PSK, Leung CLH, Cheung MH, Woo SWS, Lo TK, Chan TNH, and Wong WKK
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- Adult, Consensus, Hong Kong epidemiology, Humans, Incidence, Male, Polypharmacy, Geriatrics, Lower Urinary Tract Symptoms drug therapy, Lower Urinary Tract Symptoms epidemiology, Lower Urinary Tract Symptoms etiology
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Lower urinary tract symptoms (LUTS) are common complaints of adult men. Benign prostatic hyperplasia (BPH) represents the most common underlying cause. As the incidence of BPH increases with age, and pharmacological treatment is a major part of the disease's management, the majority of patients with LUTS are managed by primary care practitioners. There are circumstances in which specialist care by urologists or geriatricians is required, such as failure of medical treatment, adverse effects from medical treatment, or complications from BPH. Referral choices can be confusing to patients and even practitioners in different specialties under such circumstances. There is currently no local consensus about the diagnosis, medical management, or referral mechanism of patients with BPH. A workgroup was formed by members of The Hong Kong Geriatrics Society (HKGS) and the Hong Kong Urological Association (HKUA) to review evidence for the diagnosis and medical treatment of LUTS. A consensus was reached by HKGS and HKUA on an algorithm for the flow of male LUTS care and the use of uroselective alpha blockers, antimuscarinics, beta-3 adrenoceptor agonists, and 5α-reductase inhibitors in the primary care setting. This consensus by HKGS and HKUA provides a new management paradigm of male LUTS., Competing Interests: All authors have disclosed no conflicts of interest.
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- 2021
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36. Outcome and Cost of Optimal Control of Dyslipidemia in Adults With High Risk for Cardiovascular Disease.
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Tran DT, Palfrey D, Lo TKT, and Welsh R
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- Adolescent, Adult, Aged, Alberta epidemiology, Ambulatory Care economics, Ambulatory Care statistics & numerical data, Biomarkers blood, Cohort Studies, Dyslipidemias blood, Female, Health Care Costs, Hospitalization economics, Hospitalization statistics & numerical data, Humans, Male, Middle Aged, Office Visits economics, Office Visits statistics & numerical data, Secondary Prevention, Young Adult, Cardiovascular Diseases mortality, Cholesterol, LDL blood, Dyslipidemias drug therapy, Hypolipidemic Agents therapeutic use
- Abstract
Background: We assessed the impact of optimal dyslipidemia control on mortality and costs in adults at high risk for cardiovascular disease (HRCVD)., Methods: We linked Alberta health databases to identify patients aged ≥ 18 years with HRCVD between April 2012 and March 2017. The first HRCVD event was considered the index event. Patients were categorized into (1) optimal control and (2) suboptimal control of dyslipidemia based on biomarkers and lipid-lowering therapy during the year post-index event. We measured the association between optimal dyslipidemia control and mortality and health care costs using difference-in-difference and propensity score-matching methods., Results: The study included 459,739 patients with HRCVD (43,776 [9.5%] optimal patients). The optimal patients were older (median age = 62 vs 55 years; P < 0.001), included fewer female patients (37.7% vs 52%; P < 0.001), and featured a higher proportion of secondary prevention patients (15.7% vs 1.7%; P < 0.001). Compared with suboptimal patients, the optimal patients had lower adjusted mortality (0.7% vs 1.9% at 1-year and 2.9% vs 5.1% at 3-year post-index event; both P < 0.001), and higher adjusted health care costs (CA$3758 and CA$6844 at 1-year and 3-year post-index event, respectively; both P < 0.001). Among the secondary prevention group, the optimal patients had lower adjusted mortality (2.4% and 5% absolute reduction at 1-year and 3-year post-index event, respectively; both P < 0.001) at no additional costs. The results were robust across 5 definitions of optimal dyslipidemia control., Conclusions: Patients with optimal dyslipidemia control have lower mortality and incur modestly higher costs. However, secondary prevention patients experience lower mortality at no additional costs., (Copyright © 2020 Canadian Cardiovascular Society. Published by Elsevier Inc. All rights reserved.)
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- 2021
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37. Prenatal diagnosis of pathogenic genomic imbalance in fetuses with increased nuchal translucency but normal karyotyping using chromosomal microarray.
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Leung TY, Au Yeung KC, Leung WC, Leung KY, Lo TK, To WWK, Lau WL, Chan LW, Sahota DS, and Choy RKW
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- Chromosome Disorders diagnostic imaging, Chromosome Disorders genetics, Female, Hong Kong, Humans, Karyotyping, Nuchal Translucency Measurement, Pregnancy, Pregnancy Trimester, First, Prospective Studies, Chromosome Disorders diagnosis, Ultrasonography, Prenatal
- Published
- 2019
38. Women's preference for non-invasive prenatal DNA testing versus chromosomal microarray after screening for Down syndrome: a prospective study.
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Cheng Y, Leung WC, Leung TY, Choy KW, Chiu R, Lo TK, Kwok KY, and Sahota DS
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- Abortion, Spontaneous etiology, Adult, Cohort Studies, Female, Hong Kong, Humans, Microarray Analysis, Pregnancy, Prenatal Diagnosis adverse effects, Prenatal Diagnosis methods, Prenatal Diagnosis psychology, Prenatal Diagnosis statistics & numerical data, Risk Adjustment methods, Abortion, Spontaneous prevention & control, Cell-Free Nucleic Acids analysis, Cytogenetic Analysis methods, Cytogenetic Analysis statistics & numerical data, Down Syndrome diagnosis, Genetic Testing methods, Genetic Testing statistics & numerical data, Patient Preference statistics & numerical data
- Abstract
Objective: To examine preferences for follow-up testing in women screened with high or intermediate risk for Down syndrome in the first or second trimester., Design: Prospective cohort study., Setting: Three public hospitals in Hong Kong, China., Sample: Women with pregnancies termed as high risk (≥1:250; HR) or intermediate risk (1:251-1200; IR) for Down syndrome., Methods: Women with pregnancies screened as HR were offered the choices of: (1) an invasive test plus chromosomal microarray (CMA) to obtain more detailed fetal genetic information; (2) non-invasive cell-free prenatal DNA screening (NIPT) to detect trisomies 13, 18 and 21, and to avoid procedure-related miscarriage; and (3) to decline any further testing. Women received standardised counselling informing them that the reporting times were identical, the procedure miscarriage risk was 0.1-0.2% and that there was no charge for screening. Women with IR pregnancies (1:251-1200) were offered NIPT as a secondary screening test., Main Outcome Measures: Uptake rate for NIPT., Results: Three hundred and forty-seven women had pregnancies deemed as HR; 344 (99.1%) women opted for follow-up testing, 216 (62.2%) of whom chose NIPT. Five hundred and seven of 614 women (82.6%) with IR risk chose NIPT. Seven (21%) of 34 women with nuchal translucency ≥3.5 mm opted for NIPT., Conclusion: In a setting where reporting times are similar and there is no cost difference between options, approximately 60% of women with pregnancies classed as HR would opt for NIPT, offering simple but limited aneuploidy assessment, over a diagnostic procedure with comprehensive and more detailed assessment., Tweetable Abstract: 60% of pregnant Chinese women prefer NIPT over CMA when screened as high risk for Down syndrome., (© 2018 Royal College of Obstetricians and Gynaecologists.)
- Published
- 2018
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39. Factors associated with the health care cost in older Australian women with arthritis: an application of the Andersen's Behavioural Model of Health Services Use.
- Author
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Lo TK, Parkinson L, Cunich M, and Byles J
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- Aged, Aged, 80 and over, Arthritis epidemiology, Arthritis physiopathology, Australia epidemiology, Comorbidity, Complementary Therapies statistics & numerical data, Female, Humans, Insurance Coverage statistics & numerical data, Insurance, Health statistics & numerical data, Longitudinal Studies, Models, Psychological, Patient Acceptance of Health Care statistics & numerical data, Regression Analysis, Residence Characteristics statistics & numerical data, Socioeconomic Factors, Arthritis economics, Arthritis therapy, Health Care Costs statistics & numerical data, Patient Acceptance of Health Care psychology
- Abstract
Objective: Factors associated with the utilisation of health care have not been rigorously examined in people with arthritis. The objective of this study was to examine the determinants of health care utilisation and costs in older women with arthritis using the Andersen's behavioural model as a framework., Study Design: Longitudinal cohort study., Methods: Participants of Surveys 3 to 5 of the Australian Longitudinal Study on Women's Health who reported arthritis were included in the study. Information about health care utilisation and unit prices were based on linked Medicare Australia data, which included prescription medicines and health services. Total health care costs of participants with arthritis were measured for the years 2002 to 2003, 2005 to 2006, and 2008 to 2009, which corresponded to the survey years. Potential explanatory variables of the health care cost and other characteristics of the participants were collected from the health surveys. Explanatory variables were grouped into predisposing characteristics, enabling factors and need variables conforming to the Andersen's Behavioural Model of Health Services Use. Longitudinal data analysis was conducted using generalized estimating equations., Results: A total of 5834 observations were included for the three periods. Regression analysis results show that higher health care cost in older Australian women with arthritis was significantly associated with residing in an urban area, having supplementary health insurance coverage, more comorbid conditions, using complementary and alternative medicine, and worse physical functioning. It was also found that predisposing characteristics (such as the area of residence) and enabling factors (such as health insurance coverage) accounted for more variance in the health care cost than need variables (such as comorbid conditions)., Conclusion: These results may indicate an inefficient and unfair allocation of subsidised health care among older Australian women with arthritis, where individuals with less enabling resources and more socio-economic disadvantages have a lower level of health care utilisation. Future research may focus on evaluating the effectiveness of policies designed to reduce excessive out-of-pocket costs and to improve equity in health care access in the older population., (Copyright © 2015 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.)
- Published
- 2016
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40. Association between pregnancy-associated plasma protein-A levels in the first trimester and gestational diabetes mellitus in Chinese women.
- Author
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Cheuk QK, Lo TK, Wong SF, and Lee CP
- Subjects
- Adult, Early Diagnosis, Female, Hong Kong epidemiology, Humans, Pregnancy, Pregnancy Trimester, First blood, Prevalence, Statistics as Topic, Diabetes, Gestational blood, Diabetes, Gestational diagnosis, Diabetes, Gestational epidemiology, Glycated Hemoglobin analysis, Pregnancy-Associated Plasma Protein-A analysis, Pregnancy-Associated Plasma Protein-A metabolism
- Abstract
Introduction: Several studies have shown that women with pre-existing diabetes mellitus have significantly lower pregnancy-associated plasma protein-A levels than those without. This study aimed to evaluate whether first-trimester pregnancy-associated plasma protein-A multiple of median is associated with gestational diabetes mellitus in Chinese pregnant women., Methods: This prospectively collected case series was conducted in a regional hospital in Hong Kong. All consecutive Chinese women with a singleton pregnancy who attended the hospital for their first antenatal visit (before 14 weeks' gestation) from April to July 2014 were included. Pregnancy-associated plasma protein-A multiple of median was compared between the gestational diabetic (especially for early-onset gestational diabetes) and non-diabetic groups. The correlation between pregnancy-associated plasma protein-A level and glycosylated haemoglobin level in women with gestational diabetes was also examined., Results: Of the 520 women recruited, gestational diabetes was diagnosed in 169 (32.5%). Among them, 43 (25.4%) had an early diagnosis, and 167 (98.8%) with the disease were managed by diet alone. The gestational diabetic group did not differ significantly to the non-diabetic group in pregnancy-associated plasma protein-A (0.97 vs 0.99, P=0.40) or free β-human chorionic gonadotrophin multiple of median (1.05 vs 1.02, P=0.29). Compared with the non-gestational diabetic group, women with early diagnosis of gestational diabetes had a non-significant reduction in pregnancy-associated plasma protein-A multiple of median (median, interquartile range: 0.86, 0.57-1.23 vs 0.99, 0.67-1.44; P=0.11). Pregnancy-associated plasma protein-A and glycosylated haemoglobin levels were not correlated in women with gestational diabetes (r=0.027; P=0.74)., Conclusions: Chinese women with non-insulin-dependent gestational diabetes did not exhibit significant changes to pregnancy-associated plasma protein-A multiple of median nor a correlation between pregnancy-associated plasma protein-A with glycosylated haemoglobin levels. Pregnancy-associated plasma protein-A multiple of median was not predictive of non-insulin-dependent gestational diabetes or early onset of gestational diabetes. There was a high prevalence of gestational diabetes in the Chinese population.
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- 2016
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41. Indications for and pregnancy outcomes of cervical cerclage: 11-year comparison of patients undergoing history-indicated, ultrasound-indicated, or rescue cerclage.
- Author
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Chan LL, Leung TW, Lo TK, Lau WL, and Leung WC
- Subjects
- Abortion, Spontaneous epidemiology, Abortion, Spontaneous etiology, Adult, Cerclage, Cervical adverse effects, Cerclage, Cervical methods, Female, Gestational Age, Hong Kong epidemiology, Humans, Infant, Newborn, Obstetric Labor, Premature epidemiology, Obstetric Labor, Premature etiology, Pregnancy, Pregnancy Trimester, Second, Premature Birth epidemiology, Premature Birth etiology, Uterine Cervical Incompetence diagnostic imaging, Young Adult, Cerclage, Cervical statistics & numerical data, Pregnancy Outcome, Ultrasonography, Prenatal statistics & numerical data, Uterine Cervical Incompetence surgery
- Abstract
Objectives: To review and compare pregnancy outcomes of patients undergoing history-indicated, ultrasound-indicated, or rescue cerclage., Design: Case series with internal comparison., Setting: A regional obstetric unit in Hong Kong., Patients: Women undergoing cervical cerclage at Kwong Wah Hospital between 1 January 2001 and 31 December 2011., Interventions: Cervical cerclage., Main Outcome Measures: Pregnancy outcomes including miscarriage, gestational age at delivery, birth weight, and duration of pregnancy prolongation., Results: Overall, 47 patients were included. Nine (19.1%) pregnancies resulted in miscarriage. The median gestational age at delivery was 35.7 weeks. Among the 23 patients who had history-indicated cerclage, only four (17.4%) had three or more previous second-trimester miscarriages or preterm deliveries. Among the 15 patients who had ultrasound-indicated cerclage, preoperative cervical length of ≤1.5 cm was associated with shorter prolongation of pregnancy, compared with that of >1.5 cm (median, 12.1 vs 18.4 weeks; P=0.009). Among the nine women who had rescue cerclage, those who underwent the procedure before 20 weeks of gestation delivered earlier than those underwent cerclage later (median, 22.5 vs 34.1 weeks; P=0.048)., Conclusions: Patients eligible for the Royal College of Obstetricians and Gynaecologists-recommended history-indicated cerclage remain few. The majority of patients may benefit from serial ultrasound monitoring of cervical length with or without ultrasound-indicated cerclage.
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- 2015
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42. Double balloon catheter for induction of labour in Chinese women with previous caesarean section: one-year experience and literature review.
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Cheuk QK, Lo TK, Lee CP, and Yeung AP
- Subjects
- Adult, Cervical Ripening, Cesarean Section, China, Dystocia surgery, Female, Humans, Oxytocics, Oxytocin, Parturition, Pregnancy, Retrospective Studies, Time Factors, Catheters adverse effects, Labor, Induced instrumentation, Vaginal Birth after Cesarean instrumentation
- Abstract
Objectives: To evaluate the efficacy and safety of double balloon catheter for induction of labour in Chinese women with one previous caesarean section and unfavourable cervix at term., Design: Retrospective cohort study., Setting: A regional hospital in Hong Kong., Patients: Women with previous caesarean delivery requiring induction of labour at term and with an unfavourable cervix from May 2013 to April 2014., Major Outcome Measures: Primary outcome was to assess rate of successful vaginal delivery (spontaneous or instrument-assisted) using double balloon catheter. Secondary outcomes were double balloon catheter induction-to-delivery and removal-to-delivery interval; cervical score improvement; oxytocin augmentation; maternal or fetal complications during cervical ripening, intrapartum and postpartum period; and risk factors associated with unsuccessful induction., Results: All 24 Chinese women tolerated double balloon catheter well. After double balloon catheter expulsion or removal, the cervix successfully ripened in 18 (75%) cases. The improvement in Bishop score 3 (interquartile range, 2-4) was statistically significant (P<0.001). Overall, 18 (75%) cases were delivered vaginally. The median insertion-to-delivery and removal-to-delivery intervals were 19 (interquartile range, 13.4-23.0) hours and 6.9 (interquartile range, 4.1-10.8) hours, respectively. Compared with cases without, the interval to delivery was statistically significantly shorter in those with spontaneous balloon expulsion or spontaneous membrane rupture during ripening (7.8 vs 3.0 hours; P=0.025). There were no major maternal or neonatal complications. The only factor significantly associated with failed vaginal birth after caesarean was previous caesarean section for failure to progress (P<0.001)., Conclusions: This is the first study using double balloon catheter for induction of labour in Asian Chinese women with previous caesarean section. Using double balloon catheter, we achieved a vaginal birth after caesarean rate of 75% without major complications.
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- 2015
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43. Social obstetrics: non-local expectant mothers admitted through accident and emergency department in a public hospital in Hong Kong.
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Yung WK, Hui W, Chan YT, Lo TK, Tai SM, Sing C, Lam YY, Lo CM, Lau WL, and Leung WC
- Subjects
- Adult, Emergency Service, Hospital, Female, Hong Kong epidemiology, Hospitalization, Humans, Infant, Newborn, Male, Pregnancy, Retrospective Studies, Delivery, Obstetric statistics & numerical data, Hospitals, Public statistics & numerical data, Travel
- Abstract
Objectives: To review the pregnancy outcomes of non-booked, non-local pregnant women delivering in Kwong Wah Hospital via admission to the Accident and Emergency Department 1 year after the announcement by the Hospital Authority to stop antenatal booking for non-eligible persons; and to perform a literature review of local studies about non-eligible person deliveries over the last decade., Design: Case series., Setting: A public hospital in Hong Kong., Participants: All women who held the People's Republic of China passport or the two-way permit and those non-eligible persons whose spouses were Hong Kong Identity Card holders, who delivered in Kwong Wah Hospital from 1 April 2011 to 31 March 2012., Results: Overall, 219 women who were non-eligible persons delivered 221 live births during the study period. Compared with the annual statistics of Kwong Wah Hospital in 2011, non-local mothers were of higher parity; more likely to have hypertensive disease (including pre-eclamptic toxaemia), preterm deliveries (ie at <37 weeks), babies needing admission to the special care baby unit, and macrosomic babies (ie weighing >4.0 kg). The rates of induction of labour and caesarean section were lower in this group. There was no significant difference in the maternal and neonatal outcomes between women who had no booking and those who had a booking in another Hospital Authority or private hospital. There were many incidents of near-miss obstetric complications or suboptimally managed obstetric conditions due to lack of well-structured and continuous antenatal care in this group of non-eligible persons., Conclusion: Non-eligible person delivering babies in Hong Kong has become a social obstetrics phenomenon. Despite the introduction of policies, reduction in the number of deliveries (quantity) did not improve the obstetric outcomes (quality). Health care professionals should continue to be prepared for managing the potential near-miss clinical complications in this group of 'travelling mothers'.
- Published
- 2014
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44. Intensive care unit admission of obstetric cases: a single centre experience with contemporary update.
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Ng VK, Lo TK, Tsang HH, Lau WL, and Leung WC
- Subjects
- Adult, Cesarean Section, Elective Surgical Procedures, Female, Hong Kong, Humans, Hypertension, Pregnancy-Induced therapy, Length of Stay, Maternal Mortality trends, Placenta Previa surgery, Postpartum Hemorrhage therapy, Pre-Eclampsia surgery, Pregnancy, Retrospective Studies, Intensive Care Units statistics & numerical data, Obstetric Labor Complications therapy
- Abstract
OBJECTIVES. To review the characteristics of a series of obstetric patients admitted to the intensive care unit in a regional hospital in 2006-2010, to compare them with those of a similar series reported from the same hospital in 1989-1995 and a series reported from another regional hospital in 1998-2007. DESIGN. Retrospective case series. SETTING. A regional hospital in Hong Kong. PATIENTS. Obstetric patients admitted to the Intensive Care Unit of Kwong Wah Hospital from 1 January 2006 to 31 December 2010. RESULTS. From 2006 to 2010, there were 67 such patients admitted to the intensive care unit (0.23% of total maternities and 2.34% of total intensive care unit admission), which was a higher incidence than reported in two other local studies. As in the latter studies, the majority were admitted postpartum (n=65, 97%), with postpartum haemorrhage (n=39, 58%) being the commonest cause followed by pre-eclampsia/eclampsia (n=17, 25%). In the current study, significantly more patients had had elective caesarean sections for placenta praevia but fewer had had a hysterectomy. The duration of intensive care unit stay was shorter (mean, 1.8 days) with fewer invasive procedures performed than in the two previous studies, but maternal and neonatal mortality was similar (3% and 6%, respectively). CONCLUSION. Postpartum haemorrhage and pregnancy-induced hypertension were still the most common reasons for intensive care unit admission. There was an increasing trend of intensive care unit admissions following elective caesarean section for placenta praevia and for early aggressive intervention of pre-eclampsia. Maternal mortality remained low but had not decreased. The intensive care unit admission rate by itself might not be a helpful indicator of obstetric performance.
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- 2014
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45. Factors influencing the mode of delivery and associated pregnancy outcomes for twins: a retrospective cohort study in a public hospital.
- Author
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Liu AL, Yung WK, Yeung HN, Lai SF, Lam MT, Lai FK, Lo TK, Lau WL, and Leung WC
- Subjects
- Adult, Cesarean Section statistics & numerical data, Cohort Studies, Female, Humans, Infant, Newborn, Male, Maternal Age, Pregnancy, Retrospective Studies, Delivery, Obstetric methods, Pregnancy Outcome, Pregnancy, Twin
- Abstract
Objectives: To determine current trends for different modes of delivery in twin pregnancies, factors affecting the mode of delivery, and associated outcomes., Design: Retrospective cohort study., Setting: A public hospital in Hong Kong., Participants: All twin pregnancies booked at Kwong Wah Hospital during a 3-year period from 1 April 2006 to 31 March 2009., Results: Of 197 sets of twins, 35 (18%) were delivered vaginally and 162 (82%) by caesarean section (47% were emergencies and 53% elective). In all, 32 (37%) of the elective and 21 (28%) of the emergency caesarean sections were in response to maternal requests. Vaginal delivery was more common in mothers with a history of vaginal delivery and monochorionic diamniotic twins. Women who conceived by assisted reproduction or those who had a tertiary education were more likely to deliver by caesarean section. The type of conception and the presentation of the second twin were statistically significant factors affecting maternal choice on the mode of delivery. Maternal age did not affect the choice of delivery mode. Except for the higher frequency of sepsis and cord blood acidosis in second twins delivered vaginally, there were no significant differences in neonatal morbidity between the groups that attempted vaginal delivery or requested caesarean sections. All the women who had compression sutures or hysterectomy to control massive postpartum haemorrhage were delivered by caesarean section., Conclusion: A high caesarean section rate observed in our cohort was associated with maternal requests for this mode of delivery. The type of conception and the presentation of the second twin were statistically significant factors affecting maternal choice on mode of delivery. Women's requests for caesarean delivery out of the concern for their babies are not supported by current evidence. In response to a woman with a twin pregnancy requesting caesarean delivery, the pros and cons of vaginal deliveries and caesarean sections should be fully explained before the woman's autonomy is respected.
- Published
- 2012
46. Predictors of successful outcomes after external cephalic version in singleton term breech pregnancies: a nine-year historical cohort study.
- Author
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Cho LY, Lau WL, Lo TK, Tang HH, and Leung WC
- Subjects
- Adult, Cesarean Section statistics & numerical data, Cohort Studies, Female, Hong Kong, Humans, Multivariate Analysis, Patient Acceptance of Health Care, Pregnancy, Treatment Outcome, Breech Presentation, Pregnancy Outcome, Version, Fetal methods
- Abstract
Objective: To study the success rate, predictors for success, and pregnancy outcomes after external cephalic version., Design: Historical cohort study., Setting: Regional hospital, Hong Kong., Patients: All women who had singleton term breech pregnancies at term and opted for external cephalic version during 2001 and 2009. Their demographic data, clinical and ultrasound findings, procedure details, complications, and delivery outcomes were analysed., Main Outcome Measures: Predictive factors for successful external cephalic version., Results: A total of 209 external cephalic versions were performed during the 9-year period. The success rate was 63% (75% for multiparous and 53% for nulliparous women). There was no significant complication. On univariate analysis, predictors of successful external cephalic version were: multiparity, unengaged presenting part, higher amniotic fluid index (≥ 10 cm), thin abdominal wall, low uterine tone, and easily palpable fetal head (subjective assessment by practitioners before external cephalic version). On multivariate analysis, only multiparity, non-engagement of the fetal buttock and thin maternal abdomen were associated with successful external cephalic version. In all, 69% of those who had successful external cephalic version succeeded in the first roll (P<0.001), and 82% of the women with successful external cephalic versions had vaginal deliveries (93% in multiparous and 69% in nulliparous women). Uptake rate of external cephalic version was studied in the latter part of the study period (2006-2009). Whilst 735 women were eligible for external cephalic version, 131 women chose to have the procedure resulting in an uptake rate of 18%., Conclusion: External cephalic version was effective in reducing breech presentations at term and corresponding caesarean section rates, but the uptake rate was low. Further work should address the barriers to the low acceptance of external cephalic version. The results of this study could encourage women to opt for external cephalic version.
- Published
- 2012
47. Successful treatment of severe fetal chylothorax resistant to repeated pleuroamniotic shunting by OK-432 pleurodesis.
- Author
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Lo TK, Lau WL, Lam YY, Tang MH, Leung TY, and Leung WC
- Subjects
- Adult, Amniotic Fluid, Chylothorax diagnosis, Female, Fetal Diseases diagnosis, Gestational Age, Humans, Pregnancy, Recurrence, Ultrasonography, Prenatal, Chylothorax drug therapy, Chylothorax embryology, Fetal Diseases drug therapy, Picibanil administration & dosage, Pleurodesis methods
- Abstract
We report the first case of successful fetal pleurodesis with OK-432 for recurrent severe fetal primary chylothorax after failing repeated pleuroamniotic shunting. Shunting and pleurodesis could be complementary to each other in the treatment of fetal chylothorax., (Copyright © 2012 S. Karger AG, Basel.)
- Published
- 2012
- Full Text
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48. Obstetric cholestasis in Hong Kong--local experience with eight consecutive cases.
- Author
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Lo TK, Lau WL, Lam HS, Leung WC, and Chin RK
- Subjects
- Adult, Bile Acids and Salts blood, Cesarean Section, Cholestasis, Intrahepatic epidemiology, Female, Hong Kong epidemiology, Hospitals, Humans, Hypertension etiology, Incidence, Infant, Newborn, Liver Function Tests, Meconium metabolism, Postpartum Period, Pre-Eclampsia etiology, Pregnancy, Pruritus etiology, Cholestasis, Intrahepatic complications, Obstetric Labor, Premature etiology, Pregnancy Complications epidemiology, Premature Birth etiology
- Abstract
Obstetric cholestasis is associated with maternal morbidity and adverse foetal outcomes. No information on local incidence is available. We present our experience with eight consecutive cases of obstetric cholestasis diagnosed between January 2003 and December 2005 in a regional hospital in Hong Kong. Three patients presented with pruritus without rash, three with impaired liver function, and two with elevated blood pressure postpartum. Meconium-stained liquor was present in five patients and four had spontaneous preterm delivery (between 34 and 36 weeks). The higher the bile acid level, the more marked the prematurity (correlation coefficient, -0.771; P=0.025). All those presenting with itchiness delivered preterm. Two patients developed pre-eclampsia. The rates of labour induction and abdominal delivery were both 38%. Heightened awareness among clinicians is required to recognise patients with obstetric cholestasis. Affected pregnancies are associated with meconium passage and prematurity. In our locality, affected women may also have an increased risk of pre-eclampsia. In affected women, the bile acid level is useful in assessing the risk of prematurity.
- Published
- 2007
49. Sublingual misoprostol compared to artificial rupture of membranes plus oxytocin infusion for labour induction in nulliparous women with a favourable cervix at term.
- Author
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Lo TK, Lau WL, Wong KS, and Tang LC
- Subjects
- Administration, Sublingual, Cervix Uteri physiology, Female, Humans, Parity, Pregnancy, Labor, Induced, Misoprostol administration & dosage, Oxytocics administration & dosage, Oxytocin administration & dosage
- Abstract
Objectives: To compare the efficacy of labour induction using sublingual misoprostol versus combined artificial rupture of membranes and oxytocin infusion for nulliparous women with a favourable cervix at term., Design: Open randomised controlled trial., Setting: Regional hospital, Hong Kong., Patients: Fifty nulliparous women with a favourable cervix (Bishop score 6 or more) at term and indications for labour induction., Interventions: With their informed consent, 100 eligible women were to be randomised to receive either sublingual misoprostol 50 micrograms every 4 hours for up to five doses or oxytocin infusion after artificial rupture of membranes. Interim analysis was planned at a sample size of 50., Main Outcome Measures: Vaginal delivery within 24 hours of induction., Results: The study was terminated when interim analysis of the first 50 recruits showed that a significantly smaller proportion of misoprostol-treated women delivered vaginally within 24 hours of induction than in the conventional treatment group (68% vs 100%; relative risk, 0.68; 95% confidence interval, 0.51-0.91; P=0.009), although comparable numbers of women eventually delivered vaginally. The mean induction to vaginal delivery interval was 4.5 hours longer in the misoprostol group (P=0.027). After misoprostol treatment, all women went into labour. Forty percent of them delivered without oxytocin. There was no significant difference in uterine hyperstimulation rate, operative delivery rate, and neonatal outcomes. Maternal satisfaction was higher in the misoprostol group (92% vs 60%; relative risk, 1.53; 95% confidence interval, 1.09-2.16; P=0.008)., Conclusions: Despite being well accepted by women, labour induction using this regimen of sublingual misoprostol is less effective in achieving vaginal delivery within 24 hours.
- Published
- 2006
50. Chromosomal abnormalities and FMR1 gene premutation in Chinese women with premature menopause.
- Author
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Lo TK, Lo IF, Chan WK, Tong TM, and Lam ST
- Subjects
- Adult, Chromosomes, Human, X genetics, Female, Gene Deletion, Hong Kong, Humans, Logistic Models, Primary Ovarian Insufficiency genetics, Retrospective Studies, Trinucleotide Repeats genetics, Fragile X Mental Retardation Protein genetics, Menopause, Premature genetics, Sex Chromosome Aberrations
- Abstract
Objective: To study the prevalence of chromosomal abnormalities and FMR1 gene premutation in Chinese women with premature menopause in Hong Kong., Design: Retrospective study., Setting: Clinical Genetic Service, Hong Kong., Participants: Chinese women with premature menopause referred for cytogenetic study from January 1983 to November 2003., Main Outcome Measures: Chromosomal abnormalities, FMR1 gene premutation., Results: Chromosomal abnormalities were present in 15.6% of Chinese women who suffered premature menopause. X-chromosome abnormality was involved in over 80% of cases. FMR1 gene premutation was present in 0.86% of 116 cases screened for this abnormality. The predominance of X-chromosome abnormality accounted for the shorter stature, younger menopausal age, and higher prevalence of dysmorphic features among the cytogenetically abnormal patients. However, on logistic regression, no clinical feature was significantly correlated with cytogenetic abnormality., Conclusions: The prevalence of chromosomal abnormalities among Hong Kong Chinese women who suffer premature menopause was comparable with that of Caucasian and Chinese populations elsewhere. Because clinical features are poor predictors of cytogenetic abnormality, a pragmatic approach to screening is advocated. The carrier rate of fragile X premutation in these women appeared lower than that of Caucasians. Nevertheless, a search for FMR1 gene premutation, in addition to conventional chromosomal study, has important implication for prenatal diagnosis and fertility management for the extended family.
- Published
- 2005
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