Factors that influence time to prosthesis receipt after lower limb amputation: A Cox proportional hazard model regression.

BACKGROUND: Early mobility, functional independence, and ambulation are associated benefits after lower limb amputation (LLA), whereas an increased risk of clinical complications is associated with no prosthesis. OBJECTIVE: To describe time to prosthesis receipt after amputation and to assess the impact of patient demographic and health factors on the rate of prosthesis receipt within 12 months post LLA. DESIGN: A retrospective cohort analysis using commercial administrative claims data. Kaplan-Meier and Cox proportional-hazards models were applied to assess time to prosthesis receipt. SETTING: Watson/Truven administrative database 2014-2016. PARTICIPANTS: Adults aged 18-64 years with LLA who maintained their current insurance enrollment for 12 months after amputation. INTERVENTIONS: Independent variables included diabetes/vascular disease status, amputation level, age, gender, and region. MAIN OUTCOME MEASURES: Prosthesis receipt was defined based on the presence of codes billed for prosthesis services. Time was measured in days from date of amputation surgery. RESULTS: Among the sample, 510 individuals maintained insurance enrollment for 12 months after amputation, of which 443 individuals received a prosthesis within that period (79% below knee and 21% above knee). The adjusted average rate of time to prosthesis receipt was 138 (95% confidence interval [CI]: 113-185) days. Individuals with diabetes/vascular disease were 22% (hazard ratio: 1.22, 95% CI: 1.02-1.49) more likely to receive a prosthesis earlier than individuals without diabetes/vascular disease and women received a prosthesis later than men at 141 (95% CI: 126-162) days versus 106 (95% CI: 96-119) days, respectively. CONCLUSIONS: This study expands the understanding of factors that influence the likelihood of receiving a prosthesis along with the timing of prosthesis receipt after LLA among commercially insured adults. At least half of this sample received a prosthesis within 5 months or less. Disparities in timing and access to a prosthesis based on amputation level and gender were noted; future efforts are needed to address these issues.

Stability and Falls Evaluations in AMPutees (SAFE-AMP 2): Reduced functional mobility is associated with a history of injurious falls in lower limb prosthesis users.

BACKGROUND: Injurious falls have a high cost and economic impact on an individual and the health system. Several studies have assessed performance-based functional mobility in lower limb prosthesis (LLP) users and fall risk including fall history. However, limited data exist regarding the relationship between functional mobility and a history of injurious falls in individuals who use a LLP. Such information could inform clinical practice and decision making from prosthesis design to policy. The purpose of this study was to identify factors associated with a history of injurious falls among LLP users using a clinical outcomes database. METHODS: Retrospective (2016-2018) observational study. Logistic regression applied. RESULTS: A final sample of 12,044 LLP users was included for analysis. Within the sample, 1,529 individuals reported a history of an injurious fall within the previous 6 months. Self-reported functional mobility was stratified into low, middle, and high levels: differences were found between levels for history of an injurious fall. The lowest mobility level was associated with 2.29 higher odds of a history of an injurious fall (95% CI: 1.96-2.69) indicating a potentially greater serious fall risk compared to those with higher mobility levels while controlling for covariates (sex, cause of amputation and level of amputation). CONCLUSION(S): Self-reported functional mobility was associated with a history of injurious falls in LLP users. The Prosthetic Limb Users Survey of Mobility is an accessible tool that prosthetists could use to identify individuals with a high risk of falls; this can inform care planning. Rehabilitation plans and prosthesis designs that target LLP users who report low functional mobility may positively impact health outcomes.

Black-white disparities in alcohol consumption trends among women in the United States, 1990-2015.

Alcohol consumption has more adverse consequences among African American women than among white women. Yet little is known about trends in alcohol consumption among African American women. Using the National Survey on Drug Use and Health, we examined trends in alcohol consumption among African American (n = 4,079) and white (n = 17,512) women, 1990-2015. We calculated population prevalence and used the Cochrane-Armitage test to examine trends, controlling for sociodemographic factors. In adjusted analyses, binge consumption increased for African American and white women; not consuming alcohol decreased among African Americans (all p < 0.05). Results highlight the need for culturally sensitive prevention and intervention strategies.

Alcohol consumption among older women in the United States.

Few studies have examined alcohol consumption among older women. Using the nationally representative National Survey on Drug Use and Health, we examined binge, moderate, and no alcohol consumption among women ages 50+ (n = 21,178). We calculated population prevalence by age and used multivariate logistic regression, controlling for seven sociodemographic factors. In adjusted results, women ages 65+ were more likely to have moderate or no alcohol consumption than those 50-64; Hispanic and African American women were more likely to engage in binge consumption than whites (all p < .01). More research is needed to understand binge alcohol consumption among older women in racial/ethnic minorities.

The Role of Earlier Receipt of a Lower Limb Prosthesis on Emergency Department Utilization.

INTRODUCTION: Adverse events after a lower limb amputation (LLA) can negatively affect the rehabilitation process and may lead to emergency department (ED) visits. Earlier receipt of a prosthesis, as compared to delayed or not receiving a prosthesis, may decrease or moderate the risk of increased ED utilization. In addition, adverse events (ie, fall-related injury [FRI]) may be associated with increased health care utilization as measured by ED use. The implication of the timing of prosthesis provision after amputation and reduced ED use is not well established. Obtaining data about ED utilization early post-LLA could assist the rehabilitation team in ensuring timely and appropriate access to improve outcomes. OBJECTIVE: To determine the role that timing of prosthesis receipt has in ED utilization and the association of fall/FRI with health care utilization. DESIGN: Retrospective observational cohort using commercial claims data. A logistic regression model was used to assess factors that influence ED utilization post-LLA. SETTING: Watson/Truven administrative database 2014 to 2016. PARTICIPANTS: The study sample consisted of 510 adults age 18 to 64 years with continuous enrollment for 3 years. INTERVENTIONS: Independent variables included age, sex, diabetes status, amputation level, fall diagnosis, and prosthesis receipt. Fall was defined as presence of a diagnosis code in any outpatient procedure after the amputation date. MAIN OUTCOME MEASURE: ED use after amputation was defined as the presence of procedure codes that billed for ED services (99281 to 99285). RESULTS: Individuals who receive a prosthesis early, within 0 to 3 months, post-LLA were 48% (odds ratio [OR] 0.52, 95% confidence interval [CI] 0.28 to 0.97) less likely to use the ED compared to those who did not receive a prosthesis. Individuals who experienced a fall/FRI had 2.8 (OR 2.86, 95% CI 1.23 to 6.66) times the odds of ED utilization. CONCLUSION: Receipt of a prosthesis reduces the risk of ED use. The current study underscores the value of prostheses during the rehabilitation process after LLA.

Impact of Time to Receipt of Prosthesis on Total Healthcare Costs 12 Months Postamputation.

OBJECTIVE: The objective was to assess the impact of a prosthesis and the timing of prosthesis receipt on total direct healthcare costs in the 12-mo postamputation period. DESIGN: Data on patients with lower limb amputation (n = 510) were obtained from a commercial claims database for retrospective cohort analysis. Generalized linear multivariate modeling was used to determine differences in cost between groups according to timing of prosthesis receipt compared with a control group with no prosthesis. RESULTS: Receipt of a prosthesis between 0 and 3 mos post lower limb amputation yielded a reduced total cost by approximately 0.23 in log scale within 12 mos after amputation when compared with the no-prosthesis group. Despite the included costs of a prosthesis, individuals who received a prosthesis either at 4-6 mos postamputation or 7-9 mos postamputation incurred costs similar to the no-prosthesis group. CONCLUSION: Earlier receipt of a prosthesis is associated with reduced spending in the 12 mos postamputation of approximately $25,000 compared with not receiving a prosthesis. The results of this study suggest that not providing or delaying the provision of a prosthesis increases costs by about 25%.

Smoking-Related Stigma: A Public Health Tool or a Damaging Force?

BACKGROUND: Tobacco control policies and other denormalization strategies may reduce tobacco use by stigmatizing smoking. This raises an important question: Does perceived smoking-related stigma contribute to a smoker's decision to quit? The aim of this study was to evaluate if perceived smoking-related stigma was associated with smoking cessation outcomes among smokers in Mexico and Uruguay. METHODS: We analyzed prospective data from a panel of adult smokers who participated in the 2008-2012 administrations of the International Tobacco Control Policy Evaluation Surveys in Mexico and Uruguay. We defined two analytic samples of participants: the quit behavior sample (n = 3896 Mexico; n = 1525 Uruguay) and the relapse sample (n = 596 Mexico). Generalized estimating equations were used to evaluate if different aspects of perceived stigma (ie, discomfort, marginalization, and negative stereotype) at baseline were associated with smoking cessation outcomes at follow-up. RESULTS: We found that perceived smoking-related stigma was associated with a higher likelihood of making a quit attempt in Uruguay but with a lower likelihood of successful quitting in Mexico. CONCLUSIONS: This study suggests that perceived smoking-related stigma may be associated with more quit attempts, but less successful quitting among smokers. It is possible that once stigma is internalized by smokers, it may function as a damaging force. Future studies should evaluate the influence of internalized stigma on smoking behavior. IMPLICATIONS: Although perceived smoking-related stigma may prompt smokers to quit smoking, smoking stigma may also serve as a damaging force for some individuals, making quitting more difficult. This study found that perceived smoking-related stigma was associated with a higher likelihood of making a quit attempt in Uruguay but with a lower likelihood of successful quitting in Mexico.

Epigenome-wide association study of asthma and wheeze characterizes loci within HK1.

BACKGROUND: To identify novel epigenetic markers of adolescent asthma and replicate findings in an independent cohort, then explore whether such markers are detectable at birth, predictive of early-life wheeze, and associated with gene expression in cord blood. METHODS: We performed epigenome-wide screening with recursive random forest feature selection and internal validation in the IOW birth cohort. We then tested whether we could replicate these findings in the independent cohort ALSPAC and followed-up our top finding with children of the IOW cohort. RESULTS: We identified 10 CpG sites associated with adolescent asthma at a 5% false discovery rate (IOW, n = 370), five of which exhibited evidence of associations in the replication study (ALSPAC, n = 720). One site, cg16658191, within HK1 displayed particularly strong associations after cellular heterogeneity adjustments in both cohorts (ORIOW = 0.17, 95% CI 0.04-0.57) (ORALSPAC = 0.57, 95% CI 0.38-0.87). Additionally, higher expression of HK1 (OR = 3.81, 95% CI 1.41-11.77) in cord blood was predictive of wheezing in infancy (n = 82). CONCLUSION: We identified novel associations between asthma and wheeze with methylation at cg16658191 and the expression of HK1, which may serve as markers of, predictors of, and potentially etiologic factors involved in asthma and early life wheeze.

The Faith, Activity, and Nutrition (FAN) Dissemination and Implementation Study, Phase 1: Implementation Monitoring Methods and Results.

Faith-based settings offer opportunities for reaching populations at risk for chronic conditions and are optimal settings for dissemination and implementation (D&I) research. Faith, Activity, and Nutrition (FAN) is an evidence-based program designed to promote physical activity (PA) and healthy eating (HE) through church policy, systems, and environmental change. We report implementation fidelity for Phase 1 of the FAN D&I project, a countywide effort. The group randomized study included pre- and postintervention assessments of core PA and HE components. We compared implementation in early intervention ( n = 35) versus delayed intervention (control, n = 19) churches; assessed individual church implementation; and examined the effects of level of implementation on church member outcomes. Implementation assessments were conducted with the FAN coordinator via telephone survey. Study outcomes were assessed with church members 8 to 12 months following baseline assessment via self-administered surveys. We found significantly higher levels of implementation for PA opportunities, PA and HE guidelines, PA and HE messages, and PA and HE pastor support in intervention versus control churches and showed church-level variation in PA and HE implementation. PA self-efficacy varied by level of implementation; high and low implementers did not differ in proportion of church members physically inactive, although low implementers had fewer members inactive than controls. The high level of implementation in intervention churches shows promise for broader dissemination of FAN.

Sumter County on the Move! Evaluation of a Walking Group Intervention to Promote Physical Activity Within Existing Social Networks.

BACKGROUND: Social network-driven approaches have promise for promoting physical activity in community settings. Yet, there have been few direct investigations of such interventions. This study tested the effectiveness of a social network-driven, group-based walking intervention in a medically underserved community. METHODS: This study used a quasi-experimental pretest-posttest design with 3 measurement time points to examine the effectiveness of Sumter County on the Move! in communities in Sumter County, SC. A total of 293 individuals participated in 59 walking groups formed from existing social networks. Participants were 86% females, 67% black, and 31% white, with a mean age of 49.5 years. Measures included perceptions of the walking groups; psychosocial factors such as self-regulation, self-efficacy, and social support; and both self-reported and objectively measured physical activity. RESULTS: The intervention produced significant increases in goal setting and social support for physical activity from multiple sources, and these intervention effects were sustained through the final measurement point 6 months after completion of the intervention. Nonetheless, few of the desired changes in physical activity were observed. CONCLUSION: Our mixed results underscore the importance of future research to better understand the dose and duration of intervention implementation required to effect and sustain behavior change.

Development and Testing of the Church Environment Audit Tool.

OBJECTIVES: In this paper, we describe development and reliability testing of a novel tool to evaluate the physical environment of faith-based settings pertaining to opportunities for physical activity (PA) and healthy eating (HE). METHODS: Tool development was a multistage process including a review of similar tools, stakeholder review, expert feedback, and pilot testing. Final tool sections included indoor opportunities for PA, outdoor opportunities for PA, food preparation equipment, kitchen type, food for purchase, beverages for purchase, and media. Two independent audits were completed at 54 churches. Interrater reliability (IRR) was determined with Kappa and percent agreement. RESULTS: Of 218 items, 102 were assessed for IRR and 116 could not be assessed because they were not present at enough churches. Percent agreement for all 102 items was over 80%. For 42 items, the sample was too homogeneous to assess Kappa. Forty-six of the remaining items had Kappas greater than 0.60 (25 items 0.80-1.00; 21 items 0.60-0.79), indicating substantial to almost perfect agreement. CONCLUSIONS: The tool proved reliable and efficient for assessing church environments and identifying potential intervention points. Future work can focus on applications within faith-based partnerships to understand how church environments influence diverse health outcomes.

Faith, Activity, and Nutrition Randomized Dissemination and Implementation Study: Countywide Adoption, Reach, and Effectiveness.

INTRODUCTION: Faith-based organizations can contribute to improving population health, but few dissemination and implementation studies exist. This paper reports countywide adoption, reach, and effectiveness from the Faith, Activity, and Nutrition dissemination and implementation study. DESIGN: This was a group-randomized trial. Data were collected in 2016. Statistical analyses were conducted in 2017. SETTING/PARTICIPANTS: Churches in a rural, medically underserved county in South Carolina were invited to enroll, and attendees of enrolled churches were invited to complete questionnaires (n=1,308 participated). INTERVENTION: Churches (n=59) were randomized to an intervention or control (delayed intervention) condition. Church committees attended training focused on creating opportunities, setting guidelines/policies, sharing messages, and engaging pastors for physical activity (PA) and healthy eating (HE). Churches also received 12 months of telephone-based technical assistance. Community health advisors provided the training and technical assistance. MAIN OUTCOMES MEASURES: The Reach, Efficacy/Effectiveness, Adoption, Implementation, Maintenance (RE-AIM) framework guided measurement of adoption and reach. To assess effectiveness, church attendees completed post-test only questionnaires of perceptions of church environment, PA and fruit and vegetable (FV) self-efficacy, FV intake, and PA. Regression models controlled for church clustering and predominant race of congregation, as well as member age, gender, education, and self-reported cancer diagnosis. RESULTS: Church adoption was 42% (55/132). Estimated reach was 3,527, representing 42% of regular church attendees and 15% of county residents. Intervention church attendees reported greater church-level PA opportunities, PA and HE messages, and PA and HE pastor support (p<0.0001), but not FV opportunities (p=0.07). PA self-efficacy (p=0.07) and FV self-efficacy (p=0.21) were not significantly higher in attendees of intervention versus control churches. The proportion of inactive attendees was lower in intervention versus control churches (p=0.02). The proportion meeting FV (p=0.27) and PA guidelines (p=0.32) did not differ by group. CONCLUSIONS: This innovative dissemination and implementation study had high adoption and reach with favorable environmental impacts, positioning it for broader dissemination. TRIAL REGISTRATION: This study is registered at www.clinicaltrials.gov NCT02868866.

Effect of Child Gender and Psychosocial Factors on Physical Activity From Fifth to Sixth Grade.

BACKGROUND: Gender differences in physical activity (PA) trajectories during adolescence are well documented, yet little research has examined whether the determinants of these trajectories vary by child's gender. This study is one of few prospective examinations of gender differences in the influences of psychosocial and socioenvironmental factors on changes in objectively measured PA. METHODS: Students and parents from elementary and middle schools located in 2 school districts in South Carolina were enrolled in a prospective cohort study of changes in children's PA from elementary to middle school. Measures included children's and/or parents' ratings of various psychosocial and socioenvironmental factors as well as objectively measured PA, children's anthropometric characteristics, and neighborhood factors at fifth and sixth grades. RESULTS: Parents' reports of children's sport and class participation, parent-reported support for PA, and neighborhood resources for PA were protective against declines in PA for both boys and girls. The effects of 2 factors-children's self-efficacy and parents' leisure-time PA-on changes in PA over time were moderated by the child's gender. CONCLUSIONS: A better understanding of these dynamics may inform the development of interventions.

Perceived influence and college students' diet and physical activity behaviors: an examination of ego-centric social networks.

BACKGROUND: Obesity is partially a social phenomenon, with college students particularly vulnerable to changes in social networks and obesity-related behaviors. Currently, little is known about the structure of social networks among college students and their potential influence on diet and physical activity behaviors. The purpose of the study was to examine social influences impacting college students' diet and physical activity behaviors, including sources of influence, comparisons between sources' and students' behaviors, and associations with meeting diet and physical activity recommendations. METHODS: Data was collected from 40 students attending college in Hawaii. Participants completed diet and physical activity questionnaires and a name generator. Participants rated nominees' influence on their diet and physical activity behaviors as well as compared nominees' behaviors to their own. Descriptive statistics were used to look at perceptions of influence across network groups. Logistic regression models were used to examine associations between network variables and odds of meeting recommendations. RESULTS: A total of 325 nominations were made and included: family (n = 116), college friends (n = 104), high school friends (n = 87), and significant others (n = 18). Nearly half of participants were not from Hawaii. Significant others of non-Hawaii students were perceived to be the most influential (M(SD) = 9(1.07)) and high school friends the least influential (M(SD) = 1.31(.42)) network. Overall, perceived influence was highest for diet compared to physical activity, but varied based on comparisons with nominees' behaviors. Significant others were most often perceived has having similar (44 %) or worse (39 %) eating behaviors than participants, and those with similar eating behaviors were perceived as most influential (M(SD) = 9.25(1.04)). Few associations were seen between network variables and odds of meeting recommendations. CONCLUSIONS: Among the groups nominated, high school friends were perceived as least influential, especially among students who moved a long distance for college. Intervention strategies addressing perceived norms and using peer leaders may help promote physical activity among college students, while diet interventions may need to involve significant others in order to be successful. Testing of these types of intervention strategies and continued examination of social networks and their influences on diet and physical activity behaviors are needed.

Use of formative research and social network theory to develop a group walking intervention: Sumter County on the Move!

Although social support is a frequently cited enabler of physical activity, few studies have examined how to harness social support in interventions. This paper describes community-based formative research to design a walking program for mobilizing naturally occurring social networks to support increases in walking behavior. Focus group methods were used to engage community members in discussions about desired walking program features. The research was conducted with underserved communities in Sumter County, South Carolina. The majority of focus group participants were women (76%) and African American (92%). Several important themes emerged from the focus group results regarding attitudes toward walking, facilitators of and barriers to walking, ideal walking program characteristics, and strategies for encouraging community members to walk. Most noteably, the role of existing social networks as a supportive influence on physical activity was a recurring theme in our formative research and a gap in the existing evidence base. The resulting walking program focused on strategies for mobilizing, supporting and reinforcing existing social networks as mechanisms for increasing walking. Our approach to linking theory, empirical evidence and community-based formative research for the development of a walking intervention offers an example for practitioners developing intervention strategies for a wide range of behaviors.

Neighborhood Attributes Associated With the Social Environment.

PURPOSE: To examine the association between specific attributes of neighborhood environments and four social environment measures. DESIGN: Data were collected as part of a baseline survey among participants enrolling in a walking intervention. SETTING: Participants were recruited from a metropolitan area in a Southeastern state. SUBJECTS: Participants (n = 294) were predominantly African-American (67%) and female (86%), with some college education (79%) and a mean age of 49. MEASURES: The International Physical Activity Questionnaire Environment Module assessed perceptions about neighborhood attributes. The social environment was assessed using three distinct scales: social cohesion, social interactions with neighbors, and social support for physical activity from family and friends. ANALYSIS: Multiple regression models examined associations between neighborhood attributes and social environment measures, adjusting for demographic variables. RESULTS: Having walkable destinations and having access to amenities and transit stops were associated with increased interactions with neighbors (b = 1.32, 1.04, and 1.68, respectively, p < .05). Attributes related to structural support for physical activity (sidewalks, street connectivity, recreation facilities) were associated with increased interactions with neighbors (b = 1.47, 1.34, and 1.13, respectively, p < .05). Bicycling facilities that were maintained (i.e., bike lanes, racks) were associated with social support for physical activity from family and friends (b = .43 and .30, respectively, p < .05). CONCLUSION: The study highlights key attributes of neighborhood environments that may be associated with the social context of such settings.

Associations Between Maternal Support and Physical Activity Among 5th Grade Students.

BACKGROUND: A large body of research has established an association between parental support for children's physical activity (PA) and children's PA. However, there has been little attention to the relative influences of parent and child perceptions of that parental support. PURPOSE: To examine agreement among parent and child perceptions of parent support for PA and whether these perceptions are associated with objectively-measured moderate-to-vigorous physical activity (MVPA) among those children. METHODS: Cross-sectional associations between PA of children measured via accelerometers and child-reported and mother-reported perceptions of parental support for children's PA were assessed via mixed-model regression analyses in a cohort of 693 5th graders. Results Children's perceptions of parental support for PA were consistent with those of their mothers. Nonetheless, in models that included both children's and mothers' perceptions of parental support for PA, mothers' perceptions, but not children's perceptions, were significantly associated with children's PA. Associations were consistent for Total MVPA, After School MVPA, and Evening MVPA, with stronger associations among males than among females. CONCLUSION: Maternal support may influence children's PA. Studies which consider only children's accounts of parental support may overlook important mechanisms.

Persistence of Parent-Reported ADHD Symptoms From Childhood Through Adolescence in a Community Sample.

OBJECTIVE: To examine ADHD symptom persistence and factors associated with elevated symptom counts in a diverse, longitudinal community-based sample. METHOD: Parents reported demographics and completed a diagnostic interview repeatedly over a 6-year period. At Time 1, 481 interviews were completed about children (5-13 years); all participants were invited to four annual follow-up interviews, and 379 (79%) completed at least one. Inattentive (IA) and hyperactive-impulsive (HI) symptom counts were modeled with logistic quantile regression, while accounting for study design complexities. RESULTS: The prevalence of seven IA symptoms remained stable from early childhood through late adolescence. The prevalence of eight HI symptoms decreased by more than half over time. After demographic adjustment, the upper quartile of HI symptom counts decreased with age (p < .01). High HI symptom counts persisted more among those with high IA symptom counts (p = .05). CONCLUSION: This study further characterizes and provides insights into ADHD symptom trajectory through adolescence.

Longitudinal associations with changes in outdoor recreation area use for physical activity during a community-based intervention.

Outdoor recreation areas (ORA) are important resources for physical activity (PA) and health promotion. While past research has identified correlates of ORA use, few studies have examined predictors of longitudinal changes in park- and trail-based PA in community settings. Using data from a 6-month community-based walking intervention study, we examined cross-sectional and longitudinal predictors of PA in ORAs. Data were collected from baseline and 6-month assessments from participants (n=295) in a group walking intervention in South Carolina; participants enrolled from January 2012-May 2013. A decomposition scheme was used to examine the cross-sectional and longitudinal predictors of average group ORA use for PA, including social support, self-efficacy for PA, perceptions of neighborhood environment, and accelerometer-based PA, adjusting for gender. On average, participants were 49.4+13.3years old, 66.1% were Black, and the majority were women. There was a mean increase in group ORA use of 2.1+0.4days/month from baseline to 6months. Cross-sectionally, higher levels of the percentage of time in MVPA, self-efficacy, and social support were associated with greater group-average ORA use. Longitudinally, increased social support from friends and rating of lighter motorized traffic were associated with increased group ORA use. Additionally, longitudinal increases in percentage of MVPA and more favorable rating of the neighborhood as a place to walk were both associated with decreased group ORA use. Better understanding how social and physical environmental characteristics impact ORA use for PA can lead to more effective intervention strategies and warrants greater attention in future research and public health promotion efforts.

Characteristics of Walking Group Leaders as Compared With Walking Group Members in a Community-Based Study.

BACKGROUND: Walking interventions delivered by lay leaders have been shown to be effective. Knowing the characteristics of individuals who volunteer to be group leaders in walking programs could facilitate more efficient and effective recruitment and training. METHODS: Walking group leaders were recruited into a community-based program and formed walking groups from existing social networks. Leaders and members completed a survey, participated in physical measurements, and wore an accelerometer. Regression models (adjusting for group clustering and covariates) tested psychosocial and behavioral differences between leaders and members. RESULTS: The sample included 296 adults (86% women, 66% African American). Leaders (n = 60) were similar to members (n = 236) with respect to most sociodemographic and health characteristics, but were significantly older and more likely to report arthritis and high cholesterol (P-values < .05). Although leaders and members were similar in sedentary behavior and physical activity, leaders reported higher levels of exercise self-regulation, self-efficacy, and social support (P-values < .01). Leaders also reported greater use of outdoor trails (P = .005) and other outdoor recreation areas (P = .003) for physical activity than members. CONCLUSION: Although walking group leaders were no more active than members, leaders did display psychosocial characteristics and behaviors consistent with a greater readiness for change.