22 results on '"Littlewood RA"'
Search Results
2. Measured and predicted total body water in children with myelomeningocele
- Author
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Littlewood, RA, primary, Trocki, O, additional, and Cleghorn, G, additional
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- 2003
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3. The association of benefit finding to psychosocial and health behavior adaptation among HIV+ men and women.
- Author
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Littlewood RA, Vanable PA, Carey MP, and Blair DC
- Subjects
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HIV-positive women , *HIV-positive persons , *HEALTH behavior , *HUMAN behavior , *MENTAL depression - Abstract
Psychological and behavioral adaptation to HIV is integral to long-term survival. Although most research on coping with HIV has focused on factors associated with poor adaptation, recent research has expanded to include positive concomitants of adaptation, such as benefit finding. This study examined the occurrence of benefit finding among HIV+ men and women and evaluated the potential relevance of benefit finding to positive health behavior and psychosocial adaptation. HIV+ participants ( N = 221) recruited during outpatient care completed self-report assessments of benefit finding, social support, depression, HAART adherence, substance use, and physical activity. In a series of multivariate analyses that controlled for demographic and health status variables, benefit finding was associated with lower depression scores, greater social support, and more physical activity, but showed no association to HAART adherence or substance use. The association of benefit finding to depression was partially mediated by differences in social support. Thus, benefit finding may improve psychological adjustment by motivating patients who experience stress-related growth to seek social support. [ABSTRACT FROM AUTHOR]
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- 2008
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4. Exploring the long-term sustainability of school-based nutrition and food programs: What works, where and why?
- Author
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Fathi LI, Yang D, Walker JL, Robinson M, Littlewood RA, and Truby H
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- Humans, School Health Services organization & administration, Interviews as Topic, Schools organization & administration, Health Promotion methods, Health Promotion organization & administration, Food Services organization & administration, Program Evaluation methods, Nutrition Policy, Qualitative Research
- Abstract
Issue Addressed: Most food and nutrition programs cease within 2 years. Understanding the determinants of program sustainability is crucial to maximise output from funding, whilst allowing sufficient time for program benefits to be achieved. This study applied the Consolidated Framework for Implementation Research (CFIR) to map the barriers and enablers of successful long-term implementation of school-based nutrition and food programs., Methods: Qualitative methods with purposive and snowball sampling were used to recruit experts who were identified as being influential in implementing and sustaining long-term (>2 years) school-based food and nutrition programs. Semi-structured interviews with global experts were conducted, transcribed verbatim and coded deductively (by applying the CFIR constructs) and inductively when required. Thematic analysis informed the development of themes., Results: Interviews were conducted with 11 experts including researchers, government employees, and a consultant of an international agency, from seven countries. Forty-eight deductive codes and eight inductive codes identified six main themes: (1) funding and integrity of its source; (2) political landscape; (3) nutrition policies and their monitoring; (4) involvement of community actors; (5) adaptability of the program and (6) effective program evaluation. Themes related mainly to the 'outer setting' domain of the CFIR., Conclusions: The CFIR highlighted pertinent factors that influence the successful long-term implementation of school-based food and nutrition programs. SO WHAT?: The findings suggest that to sustain program implementation beyond its initial funding, relationships across government departments, local organisations and communities, need to be nurtured and prioritised from the outset., (© 2024 The Authors. Health Promotion Journal of Australia published by John Wiley & Sons Australia, Ltd on behalf of Australian Health Promotion Association.)
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- 2024
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5. A Post-Surgical Stereovision Surprise in an Adult With an Exotropia Since Infancy Previously Managed, at Two Years With Surgery.
- Author
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Littlewood RA, Rhodes M, and Burke J
- Abstract
Aim: To describe an unexpected sensory outcome in an adult male who is seeking ocular re-alignment for a psychosocially symptomatic large non-specific exotropia with suppression. The primary diagnosis was infant onset exodeviation of unclear diagnosis, was managed with bilateral strabismus surgery at two years of age, little memory of follow-up., Result: Measurable binocular single vision (BSV) was demonstrable following surgery at 17 years of age, albeit slowly between two weeks and six months postoperatively and subsequently enhanced. His newly acquired sub-optimal BSV led to symptomatic occupation-associated asthenopia. Following two subsequent operations over a 15-year period, he has stable, symptom-free ocular realignment within three prism diopters of orthophoria and performing tasks that require extended periods of near-vision activity., Conclusion: Delayed high levels of stereovision were unexpectedly achieved in an adult with infant onset exotropia with pre-operative sensory suppression that was surgically aligned to near orthophoria. The re-establishment of BSV in such a clinical scenario has to attain a level that is robust enough to meet an individual's social and occupational needs., Competing Interests: The authors have no competing interests to declare., (Copyright: © 2021 The Author(s).)
- Published
- 2021
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6. Optic nerve sheath fenestration via a supero-medial eyelid skin crease approach for the treatment of idiopathic intracranial hypertension in a UK population.
- Author
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Jefferis JM, Littlewood RA, Pepper IM, Hickman SJ, and Salvi SM
- Subjects
- Decompression, Surgical, Eyelids surgery, Humans, Optic Nerve surgery, Retrospective Studies, United Kingdom, Pseudotumor Cerebri surgery
- Abstract
Background/aims: Optic nerve sheath fenestration (ONSF) is a surgical intervention in the management of idiopathic intracranial hypertension (IIH) infrequently performed in the United Kingdom. Numerous surgical approaches have been described, including medial transconjunctival, lateral and endoscopic. We describe our outcomes and complications from ONSF via a supero-medial eyelid skin crease incision in patients with IIH., Methods: We performed a retrospective review of consecutive patients undergoing ONSF for IIH between January 2011 and December 2017 by a single surgeon., Results: Thirty patients were included in the analysis with a median follow-up of 14.5 months. Bilateral ONSFs were undertaken in 27 (90%). The data from one eye per patient were analysed. The mean kinetic perimetry score in mean radial degrees of the I4e isopter improved from 27.3° to 35.7°, p = 0.04. After removing cases with optic atrophy, the median modified Frisén grade of papilloedema improved from 2.5 to 1.0, p = 0.007. A total of 5/30 (17%) patients had complications: two (7%) had recurrence/late failure (one managed medically and one with cerebrospinal fluid [CSF] diversion surgery), one had transient cotton wool spots post-operatively, one had transient retinal haemorrhages and one patient had a transiently oval pupil. No patients had repeat ONSF, but CSF diversion surgery was subsequently carried out in 4/30 (13%) patients., Conclusions: ONSF via a supero-medial eyelid skin crease approach is effective at improving visual function in patients with IIH. The complication rates are low when compared with CSF diversion surgery and other surgical approaches for ONSF.
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- 2021
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7. How Successful is Combined Superior and Inferior Oblique Muscle Surgery in Young Children with Superior Oblique Underaction Presenting in Infancy with a Severe Head Tilt?
- Author
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Littlewood RA and Burke JP
- Abstract
Background/objective: To evaluate the success of combining ipsilateral inferior and superior oblique muscle surgery in young children with congenital unilateral superior oblique under action who present in infancy with a large socially noticeable head-tilt., Methods: A consecutive retrospective case series of young children was analysed. The success of surgery in eliminating the head-tilt was evaluated by pre- and post-operative ocular motility assessment focusing on the vertical misalignment in primary position and downgaze, the magnitude of the head-tilt in degrees and the status of the superior oblique tendon., Results: Five children had a mean age at first surgery of 41 (range 25-63) months, a mean primary position vertical deviation of 26 (25-30) prism dioptres, a head-tilt of 30 (20-35) degrees and a mean post-operative follow up of 24 (8-43) months. While there was a uniform surgical plan, nonetheless each operation required individualisation based on a spectrum of per-operative superior oblique tendon findings. The head tilt was eliminated in 40% and reduced in the remainder, to a mean of 7 (0-18) degrees and with a mean post-operative primary position vertical misalignment of 3 (range 0-10) and of 10 (range 0-40) prism dioptres in downgaze., Conclusion: Combined, ipsilateral oblique muscle surgery reduced the severe head tilt and primary position alignment to a psychosocially and functionally acceptable level. For the majority, the outcome was stable or associated with further decremental improvement. A persistent downgaze vertical tropia occurred in children with macroscopically abnormal superior oblique tendons but these cases were not identifiable clinically pre-operatively., Competing Interests: The authors have no competing interests to declare., (Copyright: © 2021 The Author(s).)
- Published
- 2021
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8. Default mode network deactivation to smoking cue relative to food cue predicts treatment outcome in nicotine use disorder.
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Wilcox CE, Claus ED, Calhoun VD, Rachakonda S, Littlewood RA, Mickey J, Arenella PB, Goodreau N, and Hutchison KE
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- Adolescent, Adult, Female, Functional Neuroimaging, Humans, Magnetic Resonance Imaging, Male, Middle Aged, Prognosis, Smoking Cessation, Tobacco Use Disorder drug therapy, Treatment Outcome, Young Adult, Brain diagnostic imaging, Cigarette Smoking drug therapy, Cues, Food, Smoking Cessation Agents therapeutic use, Tobacco Use Disorder diagnostic imaging, Varenicline therapeutic use
- Abstract
Identifying predictors of treatment outcome for nicotine use disorders (NUDs) may help improve efficacy of established treatments, like varenicline. Brain reactivity to drug stimuli predicts relapse risk in nicotine and other substance use disorders in some studies. Activity in the default mode network (DMN) is affected by drug cues and other palatable cues, but its clinical significance is unclear. In this study, 143 individuals with NUD (male n = 91, ages 18-55 years) received a functional magnetic resonance imaging scan during a visual cue task during which they were presented with a series of smoking-related or food-related video clips prior to randomization to treatment with varenicline (n = 80) or placebo. Group independent components analysis was utilized to isolate the DMN, and temporal sorting was used to calculate the difference between the DMN blood-oxygen-level dependent signal during smoke cues and that during food cues for each individual. Food cues were associated with greater deactivation compared with smoke cues in the DMN. In correcting for baseline smoking and other clinical variables, which have been shown to be related to treatment outcome in previous work, a less positive Smoke - Food difference score predicted greater smoking at 6 and 12 weeks when both treatment groups were combined (P = 0.005, β = -0.766). An exploratory analysis of executive control and salience networks demonstrated that a more positive Smoke - Food difference score for executive control network predicted a more robust response to varenicline relative to placebo. These findings provide further support to theories that brain reactivity to palatable cues, and in particular in DMN, may have a direct clinical relevance in NUD., (© 2017 Society for the Study of Addiction.)
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- 2018
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9. Moderators of smoking cessation outcomes in a randomized-controlled trial of varenicline versus placebo.
- Author
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Littlewood RA, Claus ED, Wilcox CE, Mickey J, Arenella PB, Bryan AD, and Hutchison KE
- Subjects
- Adult, Benzazepines administration & dosage, Double-Blind Method, Female, Humans, Male, Middle Aged, Placebo Effect, Tobacco Smoking drug therapy, Treatment Outcome, Nicotinic Agonists therapeutic use, Smoking drug therapy, Smoking psychology, Smoking Cessation methods, Varenicline therapeutic use
- Abstract
Rationale and Objective: Varenicline has gained a reputation as the optimal intervention for treatment resistant smokers, yet more than half of those who try it do not succeed. To better understand individual differences in the effectiveness of varenicline, this study evaluates the effectiveness of varenicline for smoking cessation in a double-blind, placebo-controlled, randomized clinical trial and examines the influence of psychological factors on treatment outcome., Method: Two hundred five cigarette smokers interested in quitting were randomly assigned to 12 weeks of varenicline or placebo. Outcomes examined were CO-confirmed continuous abstinence for the past month, average number of cigarettes smoked per day, and 7-day point prevalence., Results: Varenicline-treated participants were more likely than placebo to achieve continuous abstinence at the end of treatment (OR = 3.29; RR = 2.62), and 7-day point prevalence rates showed an effect of medication at each time point. Participants in both groups significantly reduced their smoking during the course of treatment and follow-up, and the medication by visit interaction was significant in the expected direction. Impulsivity and personality style emerged as moderators of the relationship between medication condition and treatment outcome., Conclusions: In addition to replicating efficacy results for varenicline versus placebo, the present study shows that the efficacy of pharmacotherapy is influenced by psychological factors. In an era where pharmacotherapy is often perceived as the "silver bullet," we are reminded that smoking cessation is a dynamic process and intervention must be adaptable to address individual differences.
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- 2017
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10. Functional network connectivity predicts treatment outcome during treatment of nicotine use disorder.
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Wilcox CE, Calhoun VD, Rachakonda S, Claus ED, Littlewood RA, Mickey J, Arenella PB, and Hutchison KE
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- Adult, Brain diagnostic imaging, Brain physiopathology, Corpus Striatum diagnostic imaging, Corpus Striatum drug effects, Corpus Striatum physiopathology, Female, Gyrus Cinguli diagnostic imaging, Gyrus Cinguli drug effects, Gyrus Cinguli physiopathology, Humans, Magnetic Resonance Imaging methods, Male, Middle Aged, Nerve Net physiopathology, Nicotinic Agonists therapeutic use, Smoking physiopathology, Tobacco Use Disorder diagnostic imaging, Tobacco Use Disorder physiopathology, Treatment Outcome, Brain drug effects, Nerve Net drug effects, Tobacco Use Disorder drug therapy, Varenicline therapeutic use
- Abstract
Altered resting state functional connectivity (rsFC) and functional network connectivity (FNC), which is a measure of coherence between brain networks, may be associated with nicotine use disorder (NUD). We hypothesized that higher connectivity between insula and 1) dorsal anterior cingulate cortex (dACC) and 2) dorsolateral prefrontal cortex (dlPFC) would predict better treatment outcomes. We also performed an exploratory analysis of the associations between FNC values between additional key frontal and striatal regions and treatment outcomes. One hundred and forty four individuals with NUD underwent a resting state session during functional MRI prior to randomization to treatment with varenicline (n=82) or placebo. Group independent component analysis (ICA) was utilized to extract individual subject components and time series from intrinsic connectivity networks in aforementioned regions, and FNC between all possible pairs were calculated. Higher FNC between insula and dACC (rho=0.21) was significantly correlated with lower levels of baseline smoking quantity but did not predict treatment outcome upon controlling for baseline smoking. Higher FNC between putamen and dACC, caudate and dACC, and caudate and dlPFC significantly predicted worse treatment outcome in participants reporting high subjective withdrawal before the scan. FNC between key regions hold promise as biomarkers to predict outcome in NUD., (Copyright © 2017 Elsevier Ireland Ltd. All rights reserved.)
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- 2017
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11. Dose specific effects of olanzapine in the treatment of alcohol dependence.
- Author
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Littlewood RA, Claus ED, Arenella P, Bogenschutz M, Karoly H, Ewing SW, Bryan AD, and Hutchison KE
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- Adult, Craving drug effects, Craving physiology, Dose-Response Relationship, Drug, Double-Blind Method, Female, Humans, Male, Middle Aged, Olanzapine, Treatment Outcome, Alcoholism diagnosis, Alcoholism drug therapy, Antipsychotic Agents administration & dosage, Benzodiazepines administration & dosage
- Abstract
Rationale: It is well established that the rewarding effects of alcohol are modulated by the mesolimbic dopaminergic system. Olanzapine, a D2 dopamine antagonist, has been shown to reduce alcohol craving and consumption., Objective: To clarify whether olanzapine has clinical utility in the treatment of alcohol dependence, a 12-week, double-blind, and randomized clinical trial was conducted., Methods: One hundred twenty-nine treatment-seeking alcohol-dependent adults were randomly assigned to 12 weeks of olanzapine (5 vs. 2.5 mg) or placebo. Outcomes examined were average drinks per drinking day (DDD), proportion of drinking days (PDD) to total days in treatment, alcohol craving, and impaired control over alcohol use. Mixed models were used to examine medication effects during the course of treatment on specified outcomes., Results: All of the analyses indicated a main effect for time, such that there were reductions in alcohol use and craving and an increase in control over alcohol use across treatment conditions. Dose-response analyses indicated that, in comparison to placebo, participants in the 5 mg group experienced reduced craving for alcohol and participants in the 2.5 mg group decreased in PDD and increased in their control over alcohol use. Better control over alcohol use remained significant 6 months post-treatment for the 2.5 mg group. Subjective experiences of the medication suggest that 2.5 and 5 mg were equally well tolerated., Conclusions: Results provide some support for the notion that dosage is an important consideration in relation to effectiveness; however, the cost-benefit balance does not support the clinical utility of olanzapine in treating alcohol dependence.
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- 2015
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12. The relationship between CAM use and adherence to antiretroviral therapies among persons living with HIV.
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Littlewood RA and Vanable PA
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- Adult, Cross-Sectional Studies, Female, HIV Infections drug therapy, Humans, Intention, Male, Middle Aged, Qualitative Research, Young Adult, Anti-HIV Agents administration & dosage, Complementary Therapies statistics & numerical data, HIV Infections therapy, Medication Adherence psychology, Medication Adherence statistics & numerical data
- Abstract
Objective: The use of complementary and alternative medicine (CAM) among people living with HIV and AIDS (PLWHA) may undermine other adaptive illness management behaviors, such as treatment adherence. The present study tests the hypothesis that CAM use is associated with intentional lapses in adherence (e.g., "medication vacations"), perhaps due to negative beliefs about antiretroviral therapy (ART)., Method: Cross-sectional interviews with 116 PLWHA were completed using a computerized assessment of self-reported CAM use and ART adherence., Results: Almost half of participants used CAM to treat or manage HIV-related health concerns in the past month, and 78% had used CAM since being diagnosed with HIV. Seventy-one percent of participants endorsed at least one domain of intentional nonadherence since starting HIV treatment. As hypothesized, CAM users did not differ from nonusers on overall ART adherence. Contrary to hypotheses, CAM users were less likely to report taking medication vacations or having stopped taking HIV medications without their doctor's approval compared with nonusers. CAM intensity was also related to intentional nonadherence, such that patients who engaged in more CAM tended to report fewer skipped doses and fewer nonprescribed adjustments to their medication regimen in the past month., Conclusions: Findings suggest that PLWHA use CAM as an adjunct to ART and that CAM use does not undermine ART adherence. Needed now is longitudinal research to determine how a proactive, holistic approach to HIV care interacts with conventional HIV treatment over time, and whether CAM use impacts long-term quality of life and health outcomes.
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- 2014
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13. Social-cognitive correlates of antiretroviral therapy adherence among HIV-infected individuals receiving infectious disease care in a medium-sized northeastern US city.
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Brown JL, Littlewood RA, and Vanable PA
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- Adult, Anti-HIV Agents therapeutic use, Cities, Female, HIV Infections ethnology, HIV Infections virology, Humans, Male, Medication Adherence ethnology, Medication Adherence statistics & numerical data, Middle Aged, New York, Patient Compliance ethnology, Patient Compliance statistics & numerical data, Urban Population, Anti-HIV Agents administration & dosage, HIV Infections drug therapy, Health Knowledge, Attitudes, Practice, Medication Adherence psychology, Patient Compliance psychology
- Abstract
High levels of antiretroviral therapy (ART) adherence are required to achieve optimal viral suppression. To better understand mechanisms associated with ART adherence, this study characterized demographic and social-cognitive correlates of ART adherence among HIV-infected individuals from a medium-sized northeastern US city (n=116; 42% female; 43% African-American). Participants completed an audio computer-assisted self-interviewing survey assessing demographics, social-cognitive constructs, and ART adherence, and the participants' most recent viral load was obtained from their medical charts. Suboptimal ART adherence (taking less than 95% of prescribed medications during the past month) was reported by 39% of participants and was associated with being female, being a minority, and having a detectable viral load. In a hierarchical logistic regression analysis, greater than 95% ART adherence was associated with higher levels of adherence self-efficacy (AOR =1.1; p=0.015), higher perceived normative beliefs about the importance of ART adherence (AOR=1.3; p=0.03), and lower concern about missing ART doses (AOR=0.63; p=0.002). Adherence did not differ based on ART outcome expectancies, ART attitudes, or the perceived necessity of ART. In fact, most participants endorsed positive attitudes and expectancies regarding the need for and effectiveness of ART. Taken together, results indicate that suboptimal adherence remains high among HIV-infected minority women, a subpopulation that experiences particularly high rates of chronic stress due to both illness-specific stressors and broader environmental stressors. Consistent with social-cognitive theory, adherence problems in our sample were linked with deficits in self-efficacy as well as perceived norms and behavioral intentions that do not support a goal of 100% adherence. We suggest that interventions to improve adherence informed by social-cognitive theory (1) target patients who are at risk for adherence problems, (2) provide a supportive environment that promotes high rates of adherence, and (3) address inaccurate beliefs regarding optimal adherence levels.
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- 2013
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14. What HIV-positive MSM want from sexual risk reduction interventions: findings from a qualitative study.
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Vanable PA, Carey MP, Brown JL, Littlewood RA, Bostwick R, and Blair D
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- Adult, Focus Groups, Humans, Interviews as Topic, Male, Middle Aged, Safe Sex, Young Adult, HIV Infections prevention & control, HIV Seropositivity, Homosexuality, Male, Qualitative Research, Risk Reduction Behavior, Sexual Behavior
- Abstract
To facilitate the development of a tailored intervention that meets the needs of HIV-positive men who have sex with men (HIV-positive MSM), we conducted formative research with 52 HIV-positive MSM. We sought to (a) identify major barriers to consistent condom use, (b) characterize their interest in sexual risk reduction interventions, and (c) elicit feedback regarding optimal intervention format. Men identified several key barriers to consistent condom use, including treatment optimism, lessened support for safer sex in the broader gay community, challenges communicating with partners, and concerns about stigmatization following serostatus disclosure. Many men expressed an interest in health promotion programming, but did not want to participate in an intervention focusing exclusively on safer sex. Instead, they preferred a supportive group intervention that addresses other coping challenges as well as sexual risk reduction. Study results reveal important considerations for the development of appealing and efficacious risk reduction interventions for HIV-positive MSM.
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- 2012
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15. A global perspective on complementary and alternative medicine use among people living with HIV/AIDS in the era of antiretroviral treatment.
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Littlewood RA and Vanable PA
- Subjects
- Global Health, Humans, Medicine, Traditional statistics & numerical data, Patient Acceptance of Health Care, Anti-HIV Agents therapeutic use, Complementary Therapies statistics & numerical data, HIV Infections drug therapy
- Abstract
Complementary and alternative medicine (CAM) is a popular adjunct to conventional medicine across medical populations, and is particularly relevant in the global HIV epidemic. Use of antiretroviral therapy (ART) to treat HIV is ubiquitous in high-resource areas and efforts to increase coverage in low-resource areas are underway. To better understand the role of CAM in HIV treatment and the implications of CAM use for ART uptake and adherence, we review international research published between 2007 and 2011. Findings confirm that CAM is commonly used as an adjunct to ART; however, in countries where ART is less accessible, many HIV-positive individuals take a pluralistic approach to health care, incorporating both traditional and, when available, conventional medicine. The reviewed studies provide no consensus on whether the use of CAM interferes with ART uptake or adherence; instead, research suggests that illness-related behaviors are driven by multiple factors and determined, at least in part, by the availability and accessibility of ART.
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- 2011
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16. Complementary and alternative medicine use among HIV-positive people: research synthesis and implications for HIV care.
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Littlewood RA and Vanable PA
- Subjects
- Attitude to Health, Complementary Therapies methods, HIV Seropositivity psychology, Humans, Patient Satisfaction, Anti-HIV Agents therapeutic use, Complementary Therapies statistics & numerical data, HIV Seropositivity therapy
- Abstract
Use of complementary and alternative medicine (CAM) is prevalent among HIV-positive individuals despite the success of antiretroviral treatments and limited evidence of CAM's safety and efficacy. To characterize the potential impact of CAM use on HIV care, we conducted a systematic review of 40 studies of CAM use among HIV-positive people. The goals of this review are to: (1) describe the demographic, biomedical, psychosocial and health behavior correlates of CAM use; (2) characterize patient-reported reasons for CAM use; and (3) identify methodological and conceptual limitations of the reviewed studies. Findings confirm that a high proportion of HIV-positive individuals report CAM use (M=60%). Overall, CAM use is more common among HIV-positive individuals who are men who have sex with men (MSM), non-minority, better educated and less impoverished. The use of CAM is also associated with greater HIV-symptom severity and longer disease duration. HIV-positive CAM users commonly report that they use CAM to prevent or alleviate HIV-related symptoms, reduce treatment side-effects and improve quality of life. Findings regarding the association between CAM use, psychosocial adjustment and adherence to conventional HIV medications are mixed. While the reviewed studies are instrumental in describing the characteristics of HIV-positive CAM users, this literature lacks a conceptual framework to identify causal factors involved in the decision to use CAM or explain implications of CAM use for conventional HIV care. To address this concern, we propose the use of health behavior theory and discuss implications of review findings for HIV care providers.
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- 2008
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17. Impact of HIV-related stigma on health behaviors and psychological adjustment among HIV-positive men and women.
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Vanable PA, Carey MP, Blair DC, and Littlewood RA
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- Adult, Anti-HIV Agents therapeutic use, Depression, Female, HIV Infections drug therapy, HIV Seropositivity, Humans, Male, Middle Aged, Self Disclosure, Sexual Behavior, HIV Infections prevention & control, HIV Infections psychology, Patient Compliance, Stereotyping
- Abstract
HIV-related stigmatization remains a potent stressor for HIV-positive people. This study examined the relationships among stigma-related experiences and depression, medication adherence, serostatus disclosure, and sexual risk among 221 HIV-positive men and women. In bivariate analyses that controlled for background characteristics, stigma was associated with depressive symptoms, receiving recent psychiatric care, and greater HIV-related symptoms. Stigma was also associated with poorer adherence and more frequent serostatus disclosure to people other than sexual partners, but showed no association to sexual risk behavior. In a multivariate analysis that controlled for all correlates, depression, poor adherence, and serostatus disclosure remained as independent correlates of stigma-related experiences. Findings confirm that stigma is associated with psychological adjustment and adherence difficulties and is experienced more commonly among people who disclose their HIV status to a broad range of social contacts. Stigma should be addressed in stress management, health promotion, and medication adherence interventions for HIV-positive people.
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- 2006
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18. Physical activity cost in children following an acquired brain injury--a comparative study.
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Littlewood RA, Davies PS, Cleghorn GJ, and Grote RH
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- Anthropometry, Case-Control Studies, Child, Electric Impedance, Exercise Test, Female, Humans, Male, Oxygen Consumption, Body Composition, Brain Injuries metabolism, Brain Injuries physiopathology, Energy Metabolism physiology, Running physiology, Walking physiology
- Abstract
Background: Alterations in energy expenditure during activity post head injury has not been investigated due primarily to the difficulty of measurement., Objective: The aim of this study was to compare energy expenditure during activity and body composition of children following acquired brain injury (ABI) with data from a group of normal controls., Design: Energy expenditure was measured using the Cosmed K4b(2) in a group of 15 children with ABI and a group of 67 normal children during rest and when walking and running. Mean number of steps taken per 3 min run was also recorded and body composition was measured., Results: The energy expended during walking was not significantly different between both groups. A significant difference was found between the two groups in the energy expended during running and also for the number of steps taken as children with ABI took significantly less steps than the normal controls during a 3 min run., Conclusions: Children with ABI exert more energy per activity than healthy controls when controlled for velocity or distance. However, they expend less energy to walk and run when they are free to choose their own desirable, comfortable pace than normal controls.
- Published
- 2004
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19. Resting energy expenditure and body composition in children with myelomeningocele.
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Littlewood RA, Trocki O, Shepherd RW, Shepherd K, and Davies PS
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- Adolescent, Anthropometry, Basal Metabolism, Child, Child, Preschool, Female, Humans, Male, Meningomyelocele complications, Obesity etiology, Rest, Body Composition, Energy Metabolism, Meningomyelocele physiopathology
- Abstract
Purpose: Myelomeningocele is a complex disease often complicated by obesity for reasons not well understood. The objectives of this study were to determine body composition and energy expenditure of children with MMC., Methods: Resting energy expenditure (REE), body composition and anthropometry were measured in 19 children with MMC (12 M, 7 F). Total energy expenditure (TEE) was estimated using a 3-day activity record. Energy intake (EI) was measured in seven children (5 M, 2 F) with MMC. Data were then compared with predicted values., Results: Mean REE (n = 19) was 4680 +/- 1452 kJ/day (96.1 +/- 18.1% of predicted REE). The range was large (45.8-125.7% of predicted REE). TEE (n = 7) was 4344 +/- 2376 kJ/day, hence only 73 34% of predicted TEE. EI (n = 7) was 6560 +/- 1329 kJ/day, approximating a normal energy requirement. Overall, BCM was lower than expected values., Conclusions: REE in children with MMC is variable when compared to predicted values. TEE was found to be lower in children with MMC than predicted values and EI was similar to predicted values in this group of seven children. BCM is reduced in children with MMC when compared to expected values.
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- 2003
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20. Comparison of the Cosmed K4 b(2) and the Deltatrac II metabolic cart in measuring resting energy expenditure in adults.
- Author
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Littlewood RA, White MS, Bell KL, Davies PS, Cleghorn GJ, and Grote R
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- Adult, Calibration, Calorimetry, Indirect methods, Carbon Dioxide metabolism, Energy Metabolism, Female, Humans, Male, Oxygen Consumption, Predictive Value of Tests, Reproducibility of Results, Telemetry, Basal Metabolism, Carbon Dioxide analysis, Oxygen analysis, Pulmonary Ventilation
- Abstract
Background and Aims: The objective of the study was to compare data obtained from the Cosmed K4 b(2) and the Deltatrac II metabolic cart for the purpose of determining the validity of the Cosmed K4 b(2) in measuring resting energy expenditure., Methods: Nine adult subjects (four male, five female) were measured. Resting energy expenditure was measured in consecutive sessions using the Cosmed K4 b(2), the Deltatrac II metabolic cart separately and the Cosmed K4 b(2) and Deltatrac II metabolic cart simultaneously, performed in random order. Resting energy expenditure (REE) data from both devices were then compared with values obtained from predictive equations., Results: Bland and Altman analysis revealed a mean bias for the four variables, REE, respiratory quotient (RQ), V CO(2), V O(2) between data obtained from Cosmed K4 b(2) and Deltatrac II metabolic cart of 268+/-702 kcal/day, -0.0+/-0.2, 26.4+/-118.2 and 51.6+/-126.5 ml/min, respectively. Corresponding limits of agreement for the same four variables were all large. Also, Bland and Altman analysis revealed a larger mean bias between predicted REE and measured REE using Cosmed K4 b(2) data (-194+/-603 kcal/day) than using Deltatrac metabolic cart data (73+/-197 kcal/day)., Conclusions: Variability between the two devices was very high and a degree of measurement error was detected. Data from the Cosmed K4 b(2) provided variable results on comparison with predicted values, thus, would seem an invalid device for measuring adults.
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- 2002
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21. Resting energy expenditure of children attending a rehabilitation programme following head injury.
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Littlewood RA, Trocki O, Shepherd RW, and Shepherd K
- Subjects
- Adolescent, Age Factors, Anthropometry, Child, Child, Preschool, Craniocerebral Trauma diagnosis, Female, Humans, Male, Occupational Therapy methods, Physical Therapy Modalities methods, Predictive Value of Tests, Probability, Prospective Studies, Sampling Studies, Sex Factors, Basal Metabolism physiology, Craniocerebral Trauma metabolism, Craniocerebral Trauma rehabilitation
- Abstract
Statement of Purpose: Increased resting energy expenditure following head injury is well documented, but whether this increase extends into rehabilitation and whether this is affected by changes in body composition have not been studied. The aim of this study was to determine whether children attending a rehabilitation program following head injury had altered energy expenditure and body composition., Methods: Measurements of resting energy expenditure by indirect calorimetry were performed in 21 head injured children (mean age 10.2 +/- 3.8 years). Measurement of body composition was performed using total body potassium., Results: Measured resting energy expenditure values were widely distributed, ranging from 52.3-156.4% of predicted values, yet the mean percentage predicted using Schofield weight, Schofield weight and height and World Health Organization predictive equations were 97.5%, 97.4% and 98.6%, respectively. Mean percentage of expected total body potassium for weight, height and age for head injured children were 85.1 +/- 15.5%, 89.1 +/- 14.1% and 86.9 +/- 15.9%, thus all showed significant depletion., Conclusions: During rehabilitation, using predictive equations to estimate resting energy expenditure in this group revealed a small bias on average but very large bias at the individual level. Head injured children had altered resting energy expenditure and body composition.
- Published
- 2000
- Full Text
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22. Reduced body cell mass following severe head injury in children: implications for rehabilitation.
- Author
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Littlewood RA, Wotten M, Trocki O, Shepherd RW, and Shepherd K
- Subjects
- Adolescent, Child, Child, Preschool, Female, Humans, Infant, Male, Nutritional Status, Body Composition, Craniocerebral Trauma metabolism, Craniocerebral Trauma rehabilitation, Muscles metabolism
- Abstract
Statement of Purpose: Increased proteolysis, muscle catabolism and altered body composition have been well documented after severe head injury, but the extent of these effects in children, and whether they extend into rehabilitation, have not been studied. This study determined nutritional status and body composition, with particular reference to the body cell mass (BCM), of head injured children at entry into a rehabilitation programme, and compared body composition analysis with anthropometric nutritional assessment., Methods: Nineteen head injured children (nine males, 10 females, mean age 9.1 +/- 4.3 years range 1.2-15.1 years) were measured for height, weight and total body potassium (TBK, a measure of body cell mass) on referral to rehabilitation after the acute phase (mean 38.1 days post-injury). Data was compared with expected normative data derived from healthy age and gender matched children. Nutritional status was determined by two separate criteria based on either anthropometric or body composition methods., Results: The mean percentage of expected TBK for height was 84.4 +/- 15%, significantly below the clinically acceptable level for body cell mass (90% of expected). Using the anthropometric definition, only 1/19 was undernourished, whereas 12/19 had poor nutritional status using body composition (chi 2 = 7.58, p = 0.006)., Conclusions: The data revealed a significant depletion in the metabolically active BCM in the presence of normal anthropometry, suggestive of significant muscle wasting. These findings have important pathophysiological and clinical implications in the rehabilitation of children following major head trauma.
- Published
- 1999
- Full Text
- View/download PDF
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