Department of Human Nutrition, University of Otago, Dunedin, New Zealand.
Public Health Nutr. 2010 Oct;13(10):1622-8. doi: 10.1017/S1368980009992977. Epub 2009 Dec 22.
To determine factors which predict non-completion of group non-dieting interventions for overweight women, and to investigate whether completion improves outcomes.
First, baseline predictors of non-completion were identified; then changes at 10 weeks and 12 months were compared between completers and non-completers of 10-week non-dieting interventions.
General community.
Participants were 119 women (aged 25-65 years, BMI > or = 28 kg/m2) with at least one cardiovascular risk factor. Participants who attended at least eight of the ten sessions were classified as completers, and non-completers were those who attended fewer than eight sessions. Measures included BMI, blood pressure, psychological distress, lifestyle behaviours and eating self-efficacy.
Logistic regression analyses indicated that women were less likely to be non-completers at non-dieting group programmes if, at baseline, they were more highly educated or had healthier nutrition behaviours (controlling for education). Only healthier nutrition behaviour was negatively associated with non-completion in the final model. Twelve months after the intervention, completers showed significantly greater improvements in body weight (mean change -0.53 kg), systolic and diastolic blood pressure (-6.3 and -4.1 mmHg, respectively), stress management behaviour score (+0.5) and psychotic symptoms score (-0.1) than non-completers (all P < 0.05).
Highly educated women already engaging in some healthier lifestyle choices were less likely to be non-completers in non-dieting group programmes. Since important treatment outcomes vary according to attendance, future trials of non-dieting interventions should report the effects of completion on outcomes.
确定预测超重女性群体非节食干预完成情况的因素，并研究完成干预是否能改善结果。
首先，确定完成干预的基线预测因素；然后，比较 10 周和 12 个月时完成者和未完成者 10 周非节食干预的变化。
一般社区。
参与者为 119 名女性（年龄 25-65 岁，BMI≥28kg/m2），至少有一个心血管危险因素。至少参加了十次会议中的八次的被分类为完成者，而未完成者则参加了少于八次会议。测量包括 BMI、血压、心理困扰、生活方式行为和饮食自我效能。
逻辑回归分析表明，如果女性在基线时接受过更高的教育或有更健康的营养行为（控制教育），那么她们参加非节食群体项目的可能性就越低。只有更健康的营养行为与未完成在最终模型中呈负相关。干预 12 个月后，完成者在体重（平均变化-0.53kg）、收缩压和舒张压（分别为-6.3mmHg 和-4.1mmHg）、压力管理行为评分（+0.5）和精神症状评分（-0.1）方面的改善明显大于未完成者（均 P＜0.05）。
已经从事一些更健康生活方式选择的高学历女性不太可能成为非节食群体项目的未完成者。由于根据出勤率有重要的治疗结果，未来的非节食干预试验应报告完成干预对结果的影响。
