University of Illinois, Department of Communication, Urbana, IL, USA.
Am J Public Health. 2010 Apr;100(4):638-45. doi: 10.2105/AJPH.2008.142968. Epub 2009 Jul 16.
We evaluated physical activity outcomes for children exposed to VERB, a campaign to encourage physical activity in children, across campaign years 2002 to 2006.
We examined the associations between exposure to VERB and (1) physical activity sessions (free time and organized) and (2) psychosocial outcomes (outcome expectations, self-efficacy, and social influences) for 3 nationally representative cohorts of children. Outcomes among adolescents aged 13 to 17 years (cohort 1, baseline) and children aged 9 to 13 years from cohorts 2 and 3 were analyzed for dose-response effects. Propensity scoring was used to control for confounding influences.
Awareness of VERB remained high across campaign years. In 2006, reports of children aged 10 to 13 years being active on the day before the survey increased significantly as exposure to the campaign increased. Psychosocial outcomes showed dose-response associations. Effects lessened as children aged out of the campaign target age range (cohort 1, baseline), but dose-response associations persisted in 2006 for outcome expectations and free-time physical activity.
VERB positively influenced children's physical activity outcomes. Campaign effects persisted as children grew into their adolescent years.
我们评估了儿童暴露于 VERB（一项鼓励儿童积极运动的活动）后的身体活动结果，时间跨度为 2002 年至 2006 年。
我们考察了暴露于 VERB 与（1）身体活动时间（自由时间和组织时间）和（2）心理社会结果（结果预期、自我效能和社会影响）之间的关联，涉及三个具有全国代表性的儿童队列。对年龄在 13 至 17 岁的青少年（队列 1，基线）和来自队列 2 和 3 的 9 至 13 岁儿童的结果进行了剂量反应效应分析。使用倾向评分来控制混杂影响。
在整个活动期间，对 VERB 的认识仍然很高。在 2006 年，随着对活动的接触增加，报告称 10 至 13 岁的儿童在调查前一天积极活动的比例显著增加。心理社会结果显示出剂量反应关联。随着儿童年龄超过活动目标年龄范围（队列 1，基线），效果减弱，但在 2006 年，结果预期和自由时间身体活动仍存在剂量反应关联。
VERB 对儿童的身体活动结果产生了积极影响。随着儿童进入青少年时期，活动效果持续存在。
