Prevention of weight gain among overweight adults: development and evaluation of a computer-tailored self-regulation intervention

The increasing prevalence of obesity is a major public health problem because of its negative effect on health. The long-term-effects of weight loss treatment for obesity are limited and therefore, prevention of obesity is very important. This might be achieved by weight gain prevention. This is especially relevant for overweight adults; they comprise a large group and are at high risk of becoming obese if they gain weight. Therefore, prevention of weight gain among this group has been postulated as an important strategy for preventing obesity. At the start of this study there was no evidence as to whether overweight adults were motivated for weight gain prevention. The first aim of this thesis was to increase our understanding the population’s acceptance of weight gain prevention and the determinants of motivation for weight gain prevention and change in energy-balance related behaviours among overweight adults. In addition, no obesity prevention intervention that could potentially reach a large number of overweight adults existed. To be effective such an intervention should be able to reach many people in an individualised approach and support the complicated process of change in weight-related behaviours. Therefore, the second aim of this thesis was to develop and evaluate an online, computer-tailored intervention to achieve weight gain prevention among overweight adults

Self-efficacy for health-related behaviour change in patients with TIA or minor ischemic stroke

Objective: To assess levels of self-efficacy for health-related behaviour change and its correlates in patients with TIA or ischemic stroke. Methods: In this prospective cohort study, 92 patients with TIA or ischemic stroke completed questionnaires on self-efficacy for health-related behaviour change and fear, social support and depressive symptoms. Relations between fear, social support, depressive symptoms, cognitive impairment, vascular risk factors and history and demographic characteristics and low-self-efficacy were studied with univariable and multivariable logistic regression. Results: Median total self-efficacy score at baseline was 4 (IQR 4–5). Older age (OR 1.05, 95% CI 1.01–1.09), depressive symptoms (OR 1.09, 95% CI 1.03–1.16), presence of vascular history (OR 2.42, 95% CI 0.97–6.03), higher BMI (OR 1.15, 95% CI 1.01–1.30), fear (OR 1.06, 95% CI 1.01–1.12) and low physical activity (OR 1.49, 95% CI 1.01–2.21) were significantly associated with low self-efficacy. Conclusion: Patients with recent TIA or ischemic stroke report high self-efficacy scores for health-related behaviour change. Age, vascular history, more depressive symptoms, higher BMI, less physical activity and fear were correlates of low self-efficacy levels. Practice implications: These correlates should be taken into account in the development of interventions to support patients in health behaviour change after TIA or ischemic stroke

Systematic development of a self-regulation weight-management intervention for overweight adults

Background. This paper describes the systematic development of an intervention for the prevention of obesity among overweight adults. Its development was guided by the six steps of Intervention Mapping (IM), in which the establishment of program needs, objectives and methods is followed by development of the intervention and an implementation and evaluation plan. Methods. Weight gain prevention can be achieved by making small changes in dietary intake (DI) or physical activity (PA). The intervention objectives, derived from self-regulation theory, were to establish goal-oriented behaviour. They were translated into a computer-tailored Internet-delivered intervention consisting of four modules. The intervention includes strategies to target the main determinants of self-regulation, such as feedback and action planning. The first module is intended to ensure adults' commitment to preventing weight gain, choosing behaviour change and action initiation. The second and third modules are intended to evaluate behaviour change, and to adapt action and coping plans. The fourth module is intended to maintain self-regulation of body weight without use of the program. The intervention is being evaluated for its efficacy in an RCT, whose protocol is described in this paper. Primary outcomes are weight, waist circumference and skin-fold thickness. Other outcomes are DI, PA, cognitive mediators and self-regulation skills. Discussion. The IM protocol helped us integrating insights from various theories. The performance objectives and methods were guided by self-regulation theory but empirical evidence with regard to the effectiveness of theoretical methods was limited. Sometimes, feasibility issues made it necessary to deviate from the original, theory-based plans. With this paper, we provide transparency with regard to intervention development and evaluation. Trial registration. NTR1862

A Social Gradient in the Effects of the Skills for Life Program on Self-Efficacy and Mental Wellbeing of Adolescent Students

BACKGROUND: The goal of the current study was to evaluate the effects of the Social Emotional Learning program Skills 4 Life on mental health and its risk factors self-esteem, self-efficacy, and social interaction skills in students of secondary schools. METHODS: A cluster randomized controlled study was conducted, including 38 schools (66 classes; grades 7 to 9) for secondary education, with a 1 year and 20 months follow-up (teachers and students reports). RESULTS: The intervention was effective in improving self-efficacy, depressive symptoms, and teacher-reported psychological problem behavior, all after 20 months. Stratified analyses showed effects in mainly lower educational level students. CONCLUSION: The Skills 4 Life curriculum is effective in improving the mental health and self-efficacy among adolescents, especially for adolescents from lower educational level, a group that is most prone to ill mental health

A Social Gradient in the Effects of the Skills for Life Program on Self-Efficacy and Mental Wellbeing of Adolescent Students

BACKGROUND: The goal of the current study was to evaluate the effects of the Social Emotional Learning program Skills 4 Life on mental health and its risk factors self-esteem, self-efficacy, and social interaction skills in students of secondary schools. METHODS: A cluster randomized controlled study was conducted, including 38 schools (66 classes; grades 7 to 9) for secondary education, with a 1 year and 20 months follow-up (teachers and students reports). RESULTS: The intervention was effective in improving self-efficacy, depressive symptoms, and teacher-reported psychological problem behavior, all after 20 months. Stratified analyses showed effects in mainly lower educational level students. CONCLUSION: The Skills 4 Life curriculum is effective in improving the mental health and self-efficacy among adolescents, especially for adolescents from lower educational level, a group that is most prone to ill mental health

Equity-Specific Effects of 26 Dutch Obesity-Related Lifestyle Interventions

Context: Reducing health inequalities is a policy priority in many developed countries. Little is known about effective strategies to reduce inequalities in obesity and its underlying behaviors. The goal of the study was to investigate differential effectiveness of interventions aimed at obesity prevention, the promotion of physical activity or a healthy diet by SES. Evidence acquisition: Subgroup analyses in 2010 and 2011 of 26 Dutch studies funded by The Netherlands Organization for Health Research and Development after 1990 (n=17) or identified by expert contact (n=9). Methodologic quality and differential effects were synthesized in harvest plots, subdivided by setting, age group, intensity, and time to follow-up. Evidence synthesis: Seven lifestyle interventions were rated more effective and four less effective in groups with high SES; for 15 studies no differential effects could be demonstrated. One study in the healthcare setting showed comparable effects in both socioeconomic groups. The only mass media campaign provided modest evidence for higher effectiveness among those with high SES. Individually tailored and workplace interventions were either more effective in higher-SES groups (n=4) or no differential effects were demonstrated (n=9). School-based studies (n=7) showed mixed results. Two of six community studies provided evidence for better effectiveness in lower-SES groups; none were more effective in higher-SES groups. One high-intensity community-based study provided best evidence for higher effectiveness in low-SES groups. Conclusions: Although for the majority of interventions aimed at obesity prevention, the promotion of physical activity, or a healthy diet, no differential effectiveness could be demonstrated, interventions may widen as well as reduce socioeconomic inequalities in these outcomes. Equity-specific subgroup analyses contribute to needed knowledge about what may work to reduce socioeconomic inequalities in obesity and underlying health behaviors

Equity-specific effects of 26 Dutch obesity-related lifestyle interventions

Context: Reducing health inequalities is a policy priority in many developed countries. Little is known about effective strategies to reduce inequalities in obesity and its underlying behaviors. The goal of the study was to investigate differential effectiveness of interventions aimed at obesity prevention, the promotion of physical activity or a healthy diet by SES. Evidence acquisition: Subgroup analyses in 2010 and 2011 of 26 Dutch studies funded by The Netherlands Organization for Health Research and Development after 1990 (n=17) or identified by expert contact (n=9). Methodologic quality and differential effects were synthesized in harvest plots, subdivided by setting, age group, intensity, and time to follow-up. Evidence synthesis: Seven lifestyle interventions were rated more effective and four less effective in groups with high SES; for 15 studies no differential effects could be demonstrated. One study in the healthcare setting showed comparable effects in both socioeconomic groups. The only mass media campaign provided modest evidence for higher effectiveness among those with high SES. Individually tailored and workplace interventions were either more effective in higher-SES groups (n=4) or no differential effects were demonstrated (n=9). School-based studies (n=7) showed mixed results. Two of six community studies provided evidence for better effectiveness in lower-SES groups; none were more effective in higher-SES groups. One high-intensity community-based study provided best evidence for higher effectiveness in low-SES groups. Conclusions: Although for the majority of interventions aimed at obesity prevention, the promotion of physical activity, or a healthy diet, no differential effectiveness could be demonstrated, interventions may widen as well as reduce socioeconomic inequalities in these outcomes. Equity-specific subgroup analyses contribute to needed knowledge about what may work to reduce socioeconomic inequalities in obesity and underlying health behaviors. © 2013 American Journal of Preventive Medicine