The COMS Randomized Trial of Iodine 125 Brachytherapy for Choroidal Melanoma: IV. Local Treatment Failure and Enucleation in the First 5 Years after Brachytherapy. COMS Report No. 19.

Objective: To describe the frequency and predictors of local treatment failure and enucleation after iodine 125 (I) brachytherapy in patients with choroidal melanoma treated and followed up in a large randomized clinical trial.

Design: Prospective, noncomparative, interventional case series within a randomized, multicenter clinical trial.

Participants: Patients enrolled in the Collaborative Ocular Melanoma Study (COMS) trial of enucleation versus brachytherapy between February 1987 and July 1998; tumors measured 2.

Effect of ageing on neurocognitive function by stage of HIV infection: evidence from the Multicenter AIDS Cohort Study.

Background: The demographics of the HIV epidemic in the USA have shifted towards older age. We aimed to establish the relationship between the processes of ageing and HIV infection in neurocognitive impairment.

Methods: With longitudinal data from the Multicenter AIDS Cohort Study, a long-term prospective cohort study of the natural and treated history of HIV infection among men who have sex with men in the USA, we examined the effect of ageing, HIV infection (by disease stage), and their interaction on five neurocognitive domains: information processing speed, executive function, episodic memory, working memory, and motor function.

Physical Activity and Its Association with Insulin Resistance in Multicenter AIDS Cohort Study Men.

The association between physical activity (PA), degree of insulin resistance (IR), and HIV infection is unclear. We hypothesized that PA might differentially affect the degree of IR through the direct and indirect influences of HIV, antiretroviral medications, and sociodemographic characteristics. The International Physical Activity Questionnaire (IPAQ) was administered to Multicenter AIDS Cohort Study (MACS) participants from 4/2010 to 3/2011 to generate metabolic equivalents (METs) total score and PA category.

Mixed membership trajectory models of cognitive impairment in the multicenter AIDS cohort study.

Objective: The longitudinal trajectories that individuals may take from a state of normal cognition to HIV-associated dementia are unknown. We applied a novel statistical methodology to identify trajectories to cognitive impairment, and factors that affected the 'closeness' of an individual to one of the canonical trajectories.

Design: The Multicenter AIDS Cohort Study (MACS) is a four-site longitudinal study of the natural and treated history of HIV disease among gay and bisexual men.

Self-reported body fat change in HIV-infected men is a marker of decline in physical health-related quality of life with aging, independent of co-morbidity.

Objective: Self-perception of changes in body fat among HIV+ persons is associated with decreased health related quality of life in cross-sectional studies. The longitudinal impact of body fat changes on health related quality of life, while accounting for comorbidity and anatomic location or severity of body fat changes, is unknown.

Design: This was a longitudinal analysis of HIV+ and HIV- Multicenter AIDS Cohort Study (MACS) participants who completed questionnaires assessing self-perceived body fat changes (baseline visit) and a health related quality of life (Short Form-36) at baseline and then ≥5 years later.

No association between Apoε4 alleles, HIV infection, age, neuropsychological outcome, or death.

The ε4 allele of the apolipoprotein E (ApoE) gene may have important interactions with physical health and cognitive function among individuals with HIV disease. The purpose of this study is to examine the relationships between ε4, HIV disease, age, neuropsychological impairment, and death in a large, well-characterized study sample. A total of 2846 men participating in the Multicenter AIDS Cohort Study had ApoE genotyping and neuropsychological test data available for analysis.

Sleep disordered breathing, fatigue, and sleepiness in HIV-infected and -uninfected men.

Study Objectives: We investigated the association of HIV infection and highly active antiretroviral therapy (HAART) with sleep disordered breathing (SDB), fatigue, and sleepiness.

Methods: HIV-uninfected men (HIV-; n = 60), HIV-infected men using HAART (HIV+/HAART+; n = 58), and HIV-infected men not using HAART (HIV+/HAART-; n = 41) recruited from two sites of the Multicenter AIDS cohort study (MACS) underwent a nocturnal sleep study, anthropometric assessment, and questionnaires for fatigue and the Epworth Sleepiness Scale. The prevalence of SDB in HIV- men was compared to that in men matched from the Sleep Heart Health Study (SHHS).

Cohort Profile: Recruitment cohorts in the neuropsychological substudy of the Multicenter AIDS Cohort Study.

The Multicenter AIDS Cohort Study (MACS) is one of the largest and longest running studies of the natural and treated history of HIV disease. The Neuropsychological (NP) substudy was begun in 1988 following reports of significant adverse neurological consequences of HIV disease, including dementia. The goal was to characterize the neuropsychological deficits among individuals with HIV disease, and track the natural history of the neurological complications over time.

The longitudinal and interactive effects of HIV status, stimulant use, and host genotype upon neurocognitive functioning.

Both human immunodeficiency virus (HIV)-1 infection and illicit stimulant use can adversely impact neurocognitive functioning, and these effects can be additive. However, significant variability exists such that as-of-yet unidentified exogenous and endogenous factors affect one's risk for neurocognitive impairment. Literature on both HIV and stimulant use indicates that host genetic variants in immunologic and dopamine-related genes are one such factor.

Association between systemic inflammation and obstructive sleep apnea in men with or at risk for HIV infection.

Background: We sought to determine whether markers of systemic inflammation are associated with the presence of moderate/severe obstructive sleep apnea (OSA) and whether this association differs based on HIV and HIV treatment status.

Methods: HIV-uninfected men (HIV-; n=60), HIV-infected men receiving HAART (HIV+/HAART; n=58) and HIV-infected men not receiving HAART (HIV+/no HAART; n=41) underwent polysomnograpy and measurement of plasma levels of tumour necrosis factor (TNF)-α, soluble TNF-α receptors I and II (sTNFRI and sTNFRII) and interleukin (IL)-6. The relationship between moderate/severe OSA (respiratory disturbance index ≥15 apnea/hypopnea events/h) and inflammatory markers was assessed with multivariable regression models.

Multiple breast cancer cell-lines derived from a single tumor differ in their molecular characteristics and tumorigenic potential.

Background: Breast cancer cell lines are widely used tools to investigate breast cancer biology and to develop new therapies. Breast cancer tissue contains molecularly heterogeneous cell populations. Thus, it is important to understand which cell lines best represent the primary tumor and have similarly diverse phenotype.

Genome-wide association study of neurocognitive impairment and dementia in HIV-infected adults.

The neuropathogenesis of HIV-associated neurocognitive disorders (HAND) is unclear. Candidate gene studies have implicated genetic susceptibility loci within immune-related genes; however, these have not been reliably validated. Here, we employed genome-wide association (GWA) methods to discover novel genetic susceptibility loci associated with HAND, and validate susceptibility loci implicated in prior candidate gene studies.

Effect of obesity on falls, injury, and disability.

Objectives: To examine the effect of obesity on the propensity of older adults to fall, sustain a fall-related injury, and develop disability in activities of daily living (ADLs) after a fall.

Design: Longitudinal population-based survey.

Setting: Five waves of the Health and Retirement Study (HRS), 1998-2006.

Platelet decline as a predictor of brain injury in HIV infection.

An association between platelet decline and increased risk of progression to dementia has been observed in an advanced HIV infection cohort study. This investigation evaluated the prognostic significance of platelet decline for dementia, for psychomotor slowing, and for brain injury, as quantified in vivo, in a much larger population of HIV+ men. Platelet counts and neurocognitive data were available from biannual visits of 2,125 HIV+ men participating in the prospective, Multicenter AIDS Cohort Study from 1984 to 2009.

Multisite comparison of high-sensitivity multiplex cytokine assays.

The concentrations of cytokines in human serum and plasma can provide valuable information about in vivo immune status, but low concentrations often require high-sensitivity assays to permit detection. The recent development of multiplex assays, which can measure multiple cytokines in one small sample, holds great promise, especially for studies in which limited volumes of stored serum or plasma are available. Four high-sensitivity cytokine multiplex assays on a Luminex (Bio-Rad, BioSource, Linco) or electrochemiluminescence (Meso Scale Discovery) platform were evaluated for their ability to detect circulating concentrations of 13 cytokines, as well as for laboratory and lot variability.

Addressing the well-being of Aboriginal children in out-of-home care: are we there yet?

Aim: Children in out-of-home care (OOHC) have well-documented health and developmental needs. In Australia, Aboriginal children have significantly worse health outcomes than non-Aboriginal children. We wanted to identify the health and well-being of Aboriginal children entering OOHC, placed with an Aboriginal organisation, who accessed a specialised multidisciplinary clinic in south-western Sydney.

Patient-reported outcomes among sham vs no-treatment controls from randomized trials.

Objective: To compare 2-year changes from baseline scores on the National Eye Institute Visual Function Questionnaire (NEI-VFQ) between similar participants assigned to sham and no-treatment control arms in randomized clinical trials of treatment of subfoveal choroidal neovascularization secondary to age-related macular degeneration.

Methods: We retrospectively matched sham controls from a randomized trial to no-treatment controls (no sham or placebo) from another trial on 7 baseline prognostic criteria. Two-year changes in overall and subscale scores were compared using data from those who had 2-year interviews and also using the last follow-up observation carried forward to impute missing 2-year interview scores.

TRENDS IN THE ABILITY TO WORK AMONG MEN AND WOMEN IN THE OLDER AMERICAN POPULATION: 1997-2007.

Since the passage of United States (US)' Social Security Amendments in 1983, the age for full Social Security benefits has been increasing from age 65 to 67 depending on one's year of birth. These increases introduce incremental savings in the long-term funding of the US public pension system, but they assume that American workers will be able to continue working past the age of 65. In this study, we examine self-reported work disability for men and women using the 1997 through 2007 National Health Interview Surveys.

Anthropometry in the prediction of sleep disordered breathing in HIV-positive and HIV-negative men.

Background: Body mass index (BMI), waist circumference (WC) and neck circumference (NC) are important screening tools for sleep disordered breathing (SDB); however, the utility of anthropometry for this purpose has not been evaluated among HIV-positive patients.

Methods: HIV-negative men (n=60), HIV-positive men receiving highly active antiretroviral therapy (HIV-positive/HAART; n=58) and HIV-positive men not receiving HAART (HIV-positive/no HAART; n=41) from the Multicenter AIDS Cohort Study underwent a nocturnal sleep study and anthropomorphic assessment. Moderate-severe SDB was defined as an apnea/hypopnea event rate > or =15 episodes/h.

Selective expression of a sodium pump isozyme by cough receptors and evidence for its essential role in regulating cough.

We have identified a distinct subtype of airway vagal afferent nerve that plays an essential role in regulating the cough reflex. These afferents are exquisitely sensitive to punctate mechanical stimuli, acid, and decreases in extracellular chloride concentrations, but are insensitive to capsaicin, bradykinin, histamine, adenosine, serotonin, or changes in airway intraluminal pressures. In this study we used intravital imaging, retrograde neuronal tracing, and electrophysiological analyses to characterize the structural basis for their peculiar mechanical sensitivity and to further characterize the regulation of their excitability.

Visual acuity outcomes among sham vs no-treatment controls from randomized trials.

Objective: To compare 2-year visual acuity outcomes between similar participants assigned to sham and no-treatment control arms in randomized clinical trials.

Methods: We retrospectively matched sham controls from 2 randomized trials to no-treatment controls (no sham or placebo) from 3 trials on 8 baseline prognostic criteria (full matches) or on 4 to 7 criteria (partial matches). Outcomes were compared using data from those who had 2-year visual acuity measurements and also using the last observation carried forward method to impute missing 2-year measurements.

Is the effect of reported physical activity on disability mediated by cognitive performance in white and african american older adults?

This study examined if reported physical activity has beneficial outcomes on disability through cognitive performance-mediated effects and if these mediation effects are comparable for White and African American elders. Longitudinal data from the Assets and Health Dynamics among the Oldest Old study (N = 4,472) are used to test mediation in multilevel models. During the 7-year follow-up, cognitive performance mediated the effects of reported physical activity on disability in the entire sample and in Whites but not in African Americans.

Driving status and three-year mortality among community-dwelling older adults.

Background: Driving cessation can lead to myriad negative consequences for older adults. The purpose of these analyses was to examine driving status as a predictor of mortality among community-dwelling older adults.

Methods: This prospective cohort study included 660 community-dwelling adults ranging in age between 63 and 97 years.

I-125 brachytherapy for choroidal melanoma photographic and angiographic abnormalities: the Collaborative Ocular Melanoma Study: COMS Report No. 30.

Objectives: (1) To summarize the protocol used for grading features of postradiation abnormalities from fundus photographs and fluorescein angiograms of patients enrolled in the Collaborative Ocular Melanoma Study (COMS); (2) to document the prevalence of features of interest in the posterior pole of these eyes during 8 years of follow-up; and (3) to investigate baseline patient, tumor, and treatment characteristics associated with posterior pole features.

Design: Observational case series within a randomized, multicenter clinical trial.

Participants: We evaluated 650 patients who were assigned to and received iodine-125 brachytherapy in the COMS for medium-sized tumors.