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Comparison of activity levels using the Caltrac(R) accelerometer and five questionnaires.

MILLER, DAVID J.; FREEDSON, PATTY S.; KLINE, GREG M.
Medicine & Science in Sports & Exercise: March 1994
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MILLER, D. J., P. S. FREEDSON, and G. M. KLINE. Comparison of activity levels using the Caltrac(R) accelerometer and five questionnaires. Med. Sci. Sports Exerc., Vol. 26, No. 3, pp. 376-382, 1994. The purpose of this study was to compare the physical activity levels of physical therapists using five activity questionnaires and one electronic motion sensor (Caltrac(R)). Thirty-three physical therapists (26 female, seven male) were monitored for seven consecutive days. The Caltrac(R) data were compared with five questionnaires, including the Baecke (Baecke); Godin and Shephard (Godin); Ross and Jackson (NASA); 3-d record (3-d); and 7-d recall (7-d). A significant (P < 0.01) Spearman rank order correlation coefficient was observed between the Caltrac(R) reading and the 7-d recall (r = 0.79). A significant correlation was also observed between the Caltrac(R) and the Godin (r = 0.45, P < 0.01). Three of the questionnaires were also significantly (P <0.01) correlated with each other, including the NASA with the Baecke (r = 0.52), the NASA with the Godin (r = 0.54), and the Godin with the Backe (r = 0.61). The 3-d record was not significantly correlated with any of the other measures. The strong, significant correlation observed between the Caltrac(R) data and the 7-d recall suggests adequately validity for the 7-d recall. The 7-d recall questionnaire would be quicker, easier, and less expensive to use in a large population study than the Caltrac(R)

(C)1994The American College of Sports Medicine