Rundle Andrew, Hagins Marshall, Orjuela Manuela, Mooney Laverne, Kim Marty, Perera Frederica
Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY 10032, USA.
J Urban Health. 2007 Sep;84(5):722-32. doi: 10.1007/s11524-007-9212-4. Epub 2007 Jul 27.
The purpose of this study is to investigate the construct validity of the Harvard Alumni Activity Survey (HAAS) in an urban, lower income population. Data were collected from 192 smokers enrolled in an antioxidant micronutrient trial. Activity data were compared to body mass index (BMI), diastolic, and systolic blood pressure. The traditional physical activity index (PAI), using data on stair climbing, walking, and sports, was calculated including and excluding body mass. A new scale, the total weekly activity (TWA) scale, was derived from other questions on the HAAS. The PAI scale calculated with body mass was unassociated with BMI and blood pressure. The PAI scale calculated without body mass was unassociated with BMI and systolic blood pressure but was associated with diastolic blood pressure (Beta = -0.001, p = 0.03). The TWA scale was associated with BMI (Beta = -0.01, p = 0.01), diastolic (Beta = -0.03, p = 0.01), and systolic blood pressure (Beta = -0.04, p = 0.01). A one standard deviation change in the TWA scale is predicted to be equivalent to a change of 0.99 BMI units, 2.97 mmHg of diastolic blood pressure, and 3.96 mmHg of systolic blood pressure. This work suggests that the TWA scale has greater construct validity than the traditional PAI scale in this population.
本研究的目的是在城市低收入人群中调查哈佛校友活动调查（HAAS）的结构效度。数据收集自192名参加抗氧化微量营养素试验的吸烟者。将活动数据与体重指数（BMI）、舒张压和收缩压进行比较。计算了包括和不包括体重的传统身体活动指数（PAI），该指数使用爬楼梯、步行和运动的数据。一个新的量表，即每周总活动量（TWA）量表，是从HAAS的其他问题中得出的。包含体重计算的PAI量表与BMI和血压无关。不包含体重计算的PAI量表与BMI和收缩压无关，但与舒张压有关（β=-0.001，p=0.03）。TWA量表与BMI（β=-0.01，p=0.01）、舒张压（β=-0.03，p=0.01）和收缩压（β=-0.04，p=0.01）有关。预计TWA量表一个标准差的变化相当于BMI单位变化0.99、舒张压变化2.97 mmHg和收缩压变化3.96 mmHg。这项研究表明，在该人群中，TWA量表比传统的PAI量表具有更高的结构效度。
