Validation of Questionnaire-Assessed Physical Activity in Comparison With Objective Measures Using Accelerometers and Physical Performance Measures Among Community-Dwelling Adults Aged ≥85 Years in Tokyo, Japan
To date, there is no physical activity (PA) questionnaire with convergent and construct validity for the oldest-old. The aim of the current study was to investigate the validity of questionnaire-assessed PA in comparison with objective measures determined by uniaxial and triaxial accelerometers and physical performance measures in the oldest-old.
Participants were 155 elderly (mean age 90 years) who were examined at the university and agreed to wear an accelerometer for 7 days in the 3-year-follow-up survey of the Tokyo Oldest-Old Survey of Total Health. Fifty-nine participants wore a uniaxial and triaxial accelerometer simultaneously. Self-rated walking, exercise, and household PA were measured using a modified Zutphen PA Questionnaire (PAQ). Several physical performance tests were done, and the associations among PAQ, accelerometer-assessed PA, and physical performances were compared by Spearman’s correlation coefficients.
Significant, low to moderate correlations between PA measures were seen on questionnaire and accelerometer assessments (ρ = 0.19 to 0.34). Questionnaireassessed PA measure were correlated with a range of lower extremity performance (ρ = 0.21 to 0.29).
This PAQ demonstrated convergent and construct validity. Our findings suggest that the PAQ can reasonably be used in this oldest-old population to rank their PA level.
Oguma is with the Sports Medicine Research Center, Keio University, Yokohama, Kanagawa, Japan; Keio University, Graduate School of Health Management, Fujisawa, Kanagawa, Japan. Osawa, Takayama, Abe, and Arai are with the Keio University School of Medicine, Center for Supercentenarian Medical Research, Shinjuku, Tokyo, Japan. Tanaka is with the National Institutes of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Dept of Nutritional Science, Shinjuku, Tokyo, Japan. Lee is with the Brigham and Women’s Hospital, Harvard Medical School, Division of Preventive Medicine, Boston, MA.