Niet, J.E. de

children treatment study obesity smsmt program dropout weight intervention health group bmi-sd behavior women parent month polycystic ovary syndrome family score result treatment success characteristic adolescent child effect activity weight loss message lifestyle success childhood problem predictor self-monitoring feedback patient body mass index change chapter maintenance reduction baseline research 3 months population control dropout rates polycystic bfc program session syndrome body satisfaction self-esteem ethnicity level sexarche dutch well-being follow-up number variable ovary competence hirsutism adherence difference 12 months appearance evaluation message service period factor outcome questionnaire control group participant scale intake service measure