Beyond METs: types of physical activity and depression among older adults.

BACKGROUND/OBJECTIVES: physical activity may be beneficial in reducing depression incidence among the elderly. A key unanswered question is whether certain types of physical activity are particularly associated with decreased depression incidence. We examined the relationship between quantity and type of physical activity and subsequent depression using longitudinal data from elderly adults in New York City (NYC). METHODS: we followed 3,497 adults aged 65-75 living in NYC for three years. Total physical activity was measured using the Physical Activity Scale for the Elderly (PASE) and type of physical activity was measured using a latent class analysis of PASE item responses. We used generalised estimating equations to measure the relationship between quantity and latent class of physical activity at waves 1-2 and depression at waves 2-3, controlling for wave-1 depression. RESULTS: individuals in the second highest quartile (50-75%) (odds ratio (OR) = 0.45; 95% confidence interval (CI) = 0.23, 0.88) and highest quartile of activity (OR = 0.31; 95% CI = 0.16, 0.63) had lower odds of depression. Among all subjects, athletic types (OR = 0.25; 95% CI = 0.12, 0.51) and walker types (OR = 0.58; 95% CI = 0.34, 0.99) had lower odds of depression. Among non-disabled participants, walkers (OR = 0.36; 95% CI = 0.18, 0.73), athletic types (OR = 0.14; 95% CI = 0.06, 0.32), domestic/gardening types (OR = 0.29; 95% CI = 0.12, 0.73) and domestic/gardening athletic types (OR = 0.13; 95% CI = 0.02, 0.75) had lower odds of depression. CONCLUSION: respondents who practised the highest levels of physical activity and who performed athletic activities were at lower risk for depression. Interventions aimed at promoting athletic physical activity among older adults may generate benefits for mental health.

The CHANGE Study: Methods and Sample Description for a Cross-Sectional Study of Heroin Cessation in New York City.

The CHANGE (Cessation of Heroin: A Neighborhood Grounded Exploration) Study aimed to understand factors associated with the initiation and maintenance of sustained heroin cessation from the perspective of users themselves and specifically set out to document the correlates of natural recovery. The CHANGE Study was a case-control study conducted in New York City from 2009 to 2011. Cases were former heroin users, abstinent for 1-5 years in the past 5 years. Controls used heroin at least weekly during the past 5 years and were (1) continuous heroin users without a quit attempt of ≥2 weeks' duration or (2) relapsed heroin users who were currently using and had a quit attempt of ≥2 weeks' duration during the past 5 years. Recruitment and data collection methods are described along with limitations and a brief description of the study sample. In contrast to many studies of drug use and cessation, the CHANGE Study was designed to model success (i.e., initiation and maintenance of heroin cessation) and not failure.

The Relationship Between Multiple Forms of Discrimination, Neighborhood Characteristics, and Depression Among Illicit Drug Users in New York City.

It is plausible that features of the social environment combined with experiences of discrimination may help further explain experiences of depression among illicit drug users. We examined the influence of census tract-level characteristics and multiple forms of individual-level discrimination on lifetime depression among illicit drug users in New York City enrolled in the "Social Ties Associated With Risk of Transition" study. Population average models accounted for clustering of individuals within census tracts. Discrimination based on prior incarceration explained Hispanic/White differences in depression and was independently associated with depression after accounting for neighborhood characteristics. Neighborhood poverty was only marginally related to lifetime depression. These data provide evidence supporting the influence of discrimination on depression among drug users. Research is needed to confirm these findings and highlight specific mechanisms through which discrimination and neighborhood socioeconomic status may operate to influence mental health.

Social and individual risk determinants of HIV testing practices among noninjection drug users at high risk for HIV/AIDS.

HIV testing services and research among drug users has largely focused on injection drug users (IDUs); yet noninjection drug users (NIDUs) are also at increased risk for HIV due to high-risk sexual behaviors and overlapping networks with IDUs. This study examined drug use, sexual risk, and social network characteristics associated with recent HIV testing (testing within past year) among NIDUs. Interviewer-administered questionnaires were conducted among 418 NIDUs and log-binomial regression models were used to identify correlates of recent HIV testing. Prevalence ratios (PR) with 95% confidence intervals (CI) were reported. Nearly 97% of NIDUs reported having ever been tested for HIV and most participants (85.7%) indicated testing for HIV within the past year. Factors independently associated with recent HIV testing were higher educational attainment (PR: 1.86; 95% CI: 1.03, 3.34) and networks to discuss health and medical services (PR: 1.84; 95% CI: 1.06, 1.20). A prior positive sexually transmitted infection was associated with decreased likelihood of recent HIV test (PR: 0.43; 95% CI 0.25, 0.74). Identifying specific social network characteristics may be effective in facilitating HIV testing and prevention strategies targeting NIDUs.

Comparison of injection drug users accessing syringes from pharmacies, syringe exchange programs, and other syringe sources to inform targeted HIV prevention and intervention strategies.

OBJECTIVE: To describe injection drug users (IDUs) who access syringes through different outlets to help inform the prevention needs of IDUs who underuse safe syringe sources in New York City (NYC), where syringe availability is high compared with other U.S. cities. DESIGN: Cross sectional. SETTING: NYC, 2005-2007. PARTICIPANTS: 285 IDUs. INTERVENTION: Participants were recruited using random street-intercept sampling in 36 socioeconomically disadvantaged neighborhoods. MAIN OUTCOME MEASURES: IDUs using syringe exchange programs (SEPs), pharmacies, or other outlets as a primary syringe source were compared based on sociodemographic characteristics, injection practices, and medical service use. RESULTS: Chi-square tests and polytomous logistic regression were used to compare IDUs with different self-reported primary syringe sources used in the 6 months preceding study entry. Compared with IDUs using other syringe sources, those primarily using SEPs were less likely to be black (adjusted odds ratio 0.26 [95% CI 0.11-0.57]), more likely to inject daily (3.32 [1.58-6.98]), and more likely to inject with a new syringe (2.68 [1.30-5.54]). Compared with IDUs using other syringe sources, those primarily using pharmacies were less likely to be black (0.39 [0.17-0.90]). CONCLUSION: These data suggest that pharmacies and SEPs may be reaching different populations of IDUs and highlight a subpopulation of highly marginalized IDUs (i.e., black race, infrequent injectors) who are underusing safe syringe sources in NYC. Targeted interventions are needed to reduce racial disparities and increase use of safe syringe outlets.

Patterns of Physical Activity Among Older Adults in New York City: A Latent Class Approach.

INTRODUCTION: Little research to date has explored typologies of physical activity among older adults. An understanding of physical activity patterns may help to both determine the health benefits of different types of activity and target interventions to increase activity levels in older adults. This analysis, conducted in 2014, used a latent class analysis approach to characterize patterns of physical activity in a cohort of older adults. METHODS: A total of 3,497 men and women aged 65-75 years living in New York City completed the Physical Activity Scale for the Elderly (PASE) in 2011. PASE scale items were used to classify subjects into latent classes. Multinomial regression was then used to relate individual and neighborhood characteristics to class membership. RESULTS: Five latent classes were identified: "least active," "walkers," "domestic/gardening," "athletic," and "domestic/gardening athletic." Individual-level predictors, including more education, higher income, and better self-reported health, were associated with membership in the more-active classes, particularly the athletic classes. Residential characteristics, including living in single-family housing and living in the lower-density boroughs of New York City, were predictive of membership in one of the domestic/gardening classes. Class membership was associated with BMI even after controlling for total PASE score. CONCLUSIONS: This study suggests that individual and neighborhood characteristics are associated with distinct physical activity patterns in a group of older urban adults. These patterns are associated with body habitus independent of overall activity.

Social network members' roles and use of mental health services among drug users in New York City.

Depression is more common among drug users (15-63 %) than the general population (5-16 %). Lack of social support network members may be associated with low mental health service (MHS) use rates observed among drug users. We investigated the relationship between social network members' roles and MHS use among frequent drug users using Social Ties Associated with Risk of Transition into Injection Drug Use data (NYC 2006-2009). Surveys assessed depression, MHS use, demographics, drug use and treatment, and social network members' roles. Participants reporting lifetime depressive episode with start/end dates and information on social/risk network members were included (n = 152). Adjusting for emotional support and HIV status, having one or more informational support network members remained associated with MHS use at last depressive episode (adjusted odds ratio (AOR) 3.37, 95 % confidence interval (CI) 1.38-8.19), as did history of drug treatment (AOR 2.75, 95 % CI 1.02-7.41) and no legal income (AOR 0.23, 95 % CI 0.08-0.64). These data suggest that informational support is associated with MHS utilization among depressed drug users.

Subpopulations of illicit drug users reached by targeted street outreach and respondent-driven sampling strategies: implications for research and public health practice.

PURPOSE: To determine whether illicit drug users recruited through respondent-driven sampling (RDS) and targeted street outreach (TSO) differ by comparing two samples recruited concurrently with respect to sample selection and potential recruitment biases. METHODS: Two hundred seventeen (217) heroin, crack, and cocaine users aged 18-40 years were recruited through TSO in New York City (2006-2009). Forty-six RDS seeds were recruited similarly and concurrently, yielding a maximum of 14 recruitment waves and 357 peer recruits. Baseline questionnaires ascertained sociodemographic, drug use, and drug network characteristics. Descriptive statistics and log-binomial regression were used to compare RDS and TSO samples. RESULTS: RDS recruits were more likely to be male (prevalence ratio [PR]:1.28), Hispanic (PR:1.45), black (PR: 1.58), older (PR: 1.02), homeless (PR: 1.19), and crack users (PR: 1.37). RDS recruited fewer injectors (PR:0.35) and heroin users (PR:0.74). Among injectors, RDS recruits injected less frequently (PR:0.77) and were less likely to use Needle Exchange Programs (PR:0.35). CONCLUSION: These data suggest that RDS and TSO strategies reach different subgroups of drug users. Understanding the differing capabilities of each recruitment strategy will enable researchers and public health practitioners to select an appropriate recruitment tool for future research and public health practice.

Individual, study, and neighborhood level characteristics associated with peer recruitment of young illicit drug users in New York City: optimizing respondent driven sampling.

Recruiting a representative sample using respondent driven sampling (RDS) relies on successful peer recruitment. While prior studies have identified individual-level characteristics associated with peer recruitment, study- and neighborhood-level factors may also influence peer recruitment. This analysis aimed to identify individual-, study-, and neighborhood-level factors associated with RDS peer recruitment. 390 young adult (18-40 years) heroin, crack and/or cocaine users in New York City (NYC) were recruited via RDS into a cohort study aiming to identify social risk factors for transitioning from non-injection to injection drug use (2006-2009). Individual-level baseline characteristics (demographics, drug use, and network characteristics) and study factors (number of recruitment coupons received and participant attendance at RDS training sessions (RDST) on peer recruitment) were ascertained. Aggregate measures of neighborhood attitudes about drug use, drug users, and HIV were obtained from a separate anonymous NYC resident random-digit-dialing survey (2002) and linked with baseline data by zip code. Descriptive statistics and multilevel modeling were used to identify factors associated with peer recruitment. After adjustment, recruiting each additional eligible peer recruit was associated with receiving additional recruitment coupons, RDST attendance, and a greater proportion of community residents in one's recruitment neighborhood believing that clean needles should be made available to IDUs; heroin use was negatively associated with recruiting additional eligible peers. After adjustment, recruiting each additional peer (regardless of eligibility) was associated with receiving additional recruitment coupons and RDST attendance. Our data highlight the importance of neighborhood factors and suggest that RDS may not be as effective in areas characterized by negative attitudes about drug use. Group-facilitated recruitment training sessions may help counter negative social norms when implementing RDS in drug user studies.