American Journal of Epidemiology Advance Access originally published online on October 17, 2007
American Journal of Epidemiology 2007 166(11):1355-1356; doi:10.1093/aje/kwm290
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American Journal of Epidemiology © The Author 2007. Published by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.
LETTERS TO THE EDITOR |
RE: "INFLUENCE OF EXERCISE, WALKING, CYCLING, AND OVERALL NONEXERCISE PHYSICAL ACTIVITY ON MORTALITY IN CHINESE WOMEN"
Division of Population Health and Information, Alberta Cancer Board, 1331-29 Street NW, Calgary, Alberta, Canada T2N 4N2
(e-mail: ilona.csizmadi@cancerboard.ab.ca)
| The first 10% of the full text of this article appears below. |
The reduced risk of mortality reported by Matthews et al. (1) for women with active lifestyles, achieved by participating in either exercise or nonexercise activities, is an intriguing finding. One limitation of the study, acknowledged by the authors, was the use of retrospective self-reports to estimate energy expenditure from exercise and nonexercise activities.
While the use of objective measures of energy expenditure, applied prospectively, would