Beresford Shirley A A, Thompson Beti, Bishop Sonia, Macintyre Jessica, McLerran Dale, Yasui Yutaka
Department of Epidemiology, University of Washington, Seattle, WA 98195-7236, USA.
Am J Health Behav. 2010 Nov-Dec;34(6):707-20. doi: 10.5993/ajhb.34.6.7.
To evaluate long-term change in fruit and vegetable intake following a group randomized trial of worksites.
Medium-sized blue-collar businesses in the Seattle metropolitan area were recruited. Intake was assessed using serial cross-sectional samples of current workforce at 3 time points. The multilevel 18-month intervention involved partnership with the companies. Long-term follow-up was at 4.4 years postbaseline. Statistical analysis used general linear models, adjusting for worksite random effects.
Initially, 45 worksites were randomized, with 29 agreeing to participate in a new study. Fruits and vegetable intake increased, with larger sustained changes in the intervention worksites, resulting in a long-term differential change of 0.25 servings per day, 95% confidence interval (0.09 to 0.40).
Intervention sustained small effects at 4 years, including 2 years with no contact. Although effects were not large, this low-intensity intervention approach could provide an important public health model.
在一项工作场所群组随机试验之后,评估水果和蔬菜摄入量的长期变化。
招募了西雅图都会区的中型蓝领企业。通过对在职员工在3个时间点进行系列横断面抽样来评估摄入量。为期18个月的多层面干预涉及与各公司的合作。基线后4.4年进行长期随访。统计分析采用一般线性模型,并对工作场所随机效应进行了调整。
最初,45个工作场所被随机分组,其中29个同意参与一项新研究。水果和蔬菜摄入量增加,干预工作场所的变化持续时间更长,导致长期差异变化为每天0.25份,95%置信区间(0.09至0.40)。
干预在4年时维持了较小的效果,包括有2年没有联系。虽然效果不大,但这种低强度干预方法可能提供一个重要的公共卫生模式。