Abstract
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.
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Abbreviations
- BMI:
-
body mass index
- HAAS:
-
Harvard alumni activity survey
- PAI:
-
physical activity index
- TWA:
-
total weekly activity
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Acknowledgements
This work was supported by grants from the National Institutes of Health (K07CA092348-01A1, M01RR000645-310825, and U54 CA101598-01) and The New York City Council Speaker’s Fund for Public Health Research. Dr. Rundle is a NCMHD Health Disparities Scholar.
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Rundle is with the Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA; Hagins is with the Division of Physical Therapy, School of Health Professions, Long Island University, Brooklyn Campus, Brooklyn, NY, USA; Orjuela, Mooney, Kim, and Perera are with the Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, NY, USA.
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Rundle, A., Hagins, M., Orjuela, M. et al. Traditional Physical Activity Indexes Derived from the Harvard Alumni Activity Survey Have Low Construct Validity in a Lower Income, Urban Population. J Urban Health 84, 722–732 (2007). https://doi.org/10.1007/s11524-007-9212-4
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DOI: https://doi.org/10.1007/s11524-007-9212-4