Biomedical subjects

Catherine J Martin

Publications and source records attributed to Catherine J Martin.

3 recordsLinked to original sources

PubMed2006

Depressive symptoms and changes in body weight exert independent and site-specific effects on bone in postmenopausal women exercising for 1 year.

BACKGROUND: Lower bone mineral density (BMD) has been documented in clinically depressed populations, and depression is the second most common chronic medical condition in general medical practice. Therefore, the purpose of this study was to determine whether depressive symptoms, vitality, and body weight changes were related to 1-year BMD changes after accounting for covariates. METHODS: Healthy postmenopausal women (n=320; 40-65 years) were recruited, and 266 women completed the study. Participants were 3-10 years postmenopausal, sedentary, and either taking hormone replacement therapy (1-3.9 years) or not taking it (at least 1 year). Exclusion criteria were: current smoking status, history of fractures, low BMD, body mass index>32.9 or <19.0, or use of bone altering medications. Regional BMD was measured from dual-energy x-ray absorptiometry at baseline and 1 year. Self-reported depressive symptoms and vitality were measured using standard questionnaires. RESULTS: Both the vitality and depressive symptoms scores were related to BMD changes at the femur neck but not at the greater trochanter or spine. Weight change was a predictor of BMD changes in the trochanter and spine but not in the femoral neck. Weight change and vitality and/or depressive symptoms had differential and site-specific effects on BMD changes at the hip. Vitality and depressive symptoms related to femoral neck changes and weight change related to greater trochanter changes. CONCLUSIONS: The negative impact of depressive symptoms on BMD in this population of postmenopausal women was independent of body weight or other behavioral factors such as calcium compliance or exercise.

Adult↗

PubMed2003

School climate and implementation of the Pathways study.

BACKGROUND: Pathways was a multisite school-based study to prevent obesity in American Indian school children by encouraging healthy eating and physical activity. METHODS: Over the 3-year study, a total of 290 in-depth interviews were conducted with school administrators, food service managers, classroom teachers, and physical education instructors in all 21 intervention schools to examine support and barriers for Pathways. Analysis included qualitative assessment of key themes using NUD*IST and quantitative modeling of the impact of a school climate score on implementation of intervention components. RESULTS: Overall, teachers, food service managers, and physical education instructors were supportive of the Pathways interventions. School administration and lack of family participation were perceived barriers at some schools. Attitudes toward the program ranged from neutral to positive during the first year, with about two-thirds giving positive ratings, with greater variation in successive years. Overall, the mean score was 3.5 on a 5-point scale (1=very negative, 5=very positive). School climate score was positively associated with classroom curriculum and student exposure indices, but not with family attendance, food service, or physical activity implementation indices. The latter two indices were associated with site. CONCLUSIONS: An assessment of school climate through interviews is useful in understanding successes and failures in a school-based health intervention and can predict implementation success for some programs.

Child↗

PubMed2002

Weight loss readiness in middle-aged women: psychosocial predictors of success for behavioral weight reduction.

Accurate prediction of weight loss success and failure has eluded researchers for many years. Thus, we administered a comprehensive psychometric battery before a 4-month lifestyle behavioral weight reduction program and analyzed weight changes during that period to identify baseline characteristics of successful and unsuccessful participants, among 112 overweight and obese middle-aged women (age, 47.8 +/- 4.4 years; BMI, 31.4 +/- 3.9 kg/m2). Mean weight and percentage fat losses among the 89 completers were -5.4 kg and -3.4%, respectively (p < .001). A higher number of recent dieting attempts and recent weight loss, more stringent weight outcome evaluations, a higher perceived negative impact of weight on quality of life, lower self-motivation, higher body size dissatisfaction, and lower self-esteem were associated with less weight loss and significantly distinguished responders from nonresponders among all participants. These findings are discussed as to their usefulness (i) to screen individuals before treatment, (ii) to provide a better match between interventions to participants, and (iii) to build a weight loss readiness questionnaire.

Adult↗