Merrill Ray M, Aldana Steven G, Greenlaw Roger L, Diehl Hans A, Salberg Audrey, Englert Heike
Department of Health Science, College of Health and Human Performance, Brigham Young University, 229-A Richards Bldg, Provo, UT 84602-2214, USA.
Prev Chronic Dis. 2008 Jan;5(1):A13. Epub 2007 Dec 15.
We evaluated data from the Coronary Health Improvement Project (CHIP) to determine whether improved health behaviors associated with this intervention persisted or decayed during 18 months of follow-up.
Participants were 348 volunteers aged 24 to 81 years from the Rockford, Illinois, metropolitan area enrolled in CHIP, a 4-week educational course delivered as lectures. The intervention taught the importance of making better lifestyle choices and improving dietary and physical activity behaviors. Physical activity and dietary behaviors were assessed at baseline, and changes in behaviors were assessed at 6 weeks and 18 months. Changes were evaluated according to quartile groupings of each variable at baseline.
No baseline differences were found between participants who dropped out and participants who provided data through 18 months. Mean changes significantly improved through 6 weeks for each of the 21 selected physical activity and dietary behavior variables except percentage of daily calories from carbohydrates. Mean changes significantly improved through 18 months for each of the 21 variables except calories from protein, alcohol, and whole grain servings. The percentage of participants who improved their physical or dietary behavior at 6 weeks ranged from 49% for percentage of daily calories from carbohydrates (64% at 18 months) to 91% for intake of dietary cholesterol per day (84% at 18 months). The level of change through 18 months for all variables was significantly influenced by quartile groupings at baseline. Physical activity improved significantly through 18 months only for participants in the lowest two quartiles of physical activity at baseline. Exercise decreased significantly through 18 months for participants in the highest quartile of physical activity at baseline.
During an 18-month period, participants' physical activity and dietary behaviors improved significantly. Even though behavior improvement tended to be greater at 6 weeks, most healthy behaviors did not return to baseline levels after 18 months.
我们评估了冠状动脉健康改善项目（CHIP）的数据，以确定与该干预措施相关的健康行为改善在18个月的随访期间是持续存在还是衰退。
参与者是来自伊利诺伊州罗克福德市区的348名年龄在24至81岁之间的志愿者，他们参加了CHIP，这是一个为期4周的以讲座形式开展的教育课程。该干预措施传授了做出更好生活方式选择以及改善饮食和身体活动行为的重要性。在基线时评估身体活动和饮食行为，并在6周和18个月时评估行为变化。根据每个变量在基线时的四分位数分组来评估变化。
退出的参与者与提供18个月数据的参与者之间在基线时未发现差异。除了碳水化合物提供的每日卡路里百分比外，21个选定的身体活动和饮食行为变量中的每一个在6周时平均变化均显著改善。除了蛋白质、酒精和全谷物份数的卡路里外，21个变量中的每一个在18个月时平均变化均显著改善。在6周时身体或饮食行为得到改善的参与者百分比范围从碳水化合物提供的每日卡路里百分比的49%（18个月时为64%）到每日饮食胆固醇摄入量的91%（18个月时为84%）。所有变量在18个月时的变化水平受到基线时四分位数分组的显著影响。仅对于基线时身体活动处于最低两个四分位数的参与者，身体活动在18个月时显著改善。对于基线时身体活动处于最高四分位数的参与者，运动在18个月时显著减少。
在18个月期间，参与者的身体活动和饮食行为显著改善。尽管行为改善在6周时往往更大，但大多数健康行为在18个月后并未恢复到基线水平。
