Pullen Carol H, Hageman Patricia A, Boeckner Linda, Walker Susan Noble, Oberdorfer Maureen K
College of Nursing, University of Nebraska Medical Center, Omaha, NE 68198-5330, USA.
J Geriatr Phys Ther. 2008;31(3):105-12. doi: 10.1519/00139143-200831030-00006.
The increased availability and use of the Internet by midlife and older women who seek health information may provide an innovative method for delivering weight loss interventions. This preliminary study examined the feasibility and efficacy of web-based interventions for promoting weight loss among rural overweight and obese women ages 50-69 (M = 55.5 +/- 4.9) over a 3-month period.
Twenty-one Caucasian women with body mass index of 28-34.5 (M = 30.69 +/- 2.58) were randomly assigned to either a Web site only or Web site augmented with a peer-led support group. The Web site included recommended approaches to healthy eating and activity, weekly newsletters, and other resources. Body weight, eating, and activity measures were assessed at baseline and postintervention. Data analysis included 2-way repeated measures ANOVAs with effect sizes reported as appropriate for a pilot study.
Sixteen women (76.2%) completed the study; 14 lost from 2% to 10% of their body weight, and 2 gained 2% of their weight. Large effect sizes were found over time for body weight, estimated VO2max, and percentage of calories from fat. For time by group interaction, large effect sizes favoring the Web site plus peer-led support group were found for body weight, waist circumference, percent body fat, whole grain servings, and both systolic and diastolic blood pressure. Process evaluations indicated that 85.7% of women accessed the Web site weekly. There were a total of 305 hits in the Web site only group versus 658 hits in the peer-led support groups.
Internet delivered interventions appeared feasible for these rural women with weight loss and improvement in selected eating and activity measures after 3 months.
寻求健康信息的中年及老年女性对互联网的使用日益增加，这可能为提供减肥干预措施提供一种创新方法。这项初步研究检验了基于网络的干预措施在3个月内促进50 - 69岁（平均年龄55.5±4.9岁）农村超重和肥胖女性减肥的可行性和有效性。
21名体重指数为28 - 34.5（平均30.69±2.58）的白人女性被随机分配到仅网站组或网站加同伴主导支持小组组。该网站包括健康饮食和活动的推荐方法、每周时事通讯及其他资源。在基线和干预后评估体重、饮食和活动指标。数据分析包括双向重复测量方差分析，效应量报告适合初步研究。
16名女性（76.2%）完成了研究；14人体重减轻了2%至10%，2人体重增加了2%。随着时间推移，体重、估计的最大摄氧量和脂肪热量百分比的效应量较大。对于时间与组的交互作用，在体重、腰围、体脂百分比、全谷物摄入量以及收缩压和舒张压方面，有利于网站加同伴主导支持小组的效应量较大。过程评估表明，85.7%的女性每周访问该网站。仅网站组共有305次点击，而同伴主导支持小组有658次点击。
对于这些农村女性，基于互联网的干预措施在3个月后减肥以及改善某些饮食和活动指标方面似乎是可行的。
