Validity of a standard questionnaire to assess physical activity for specific medical checkups and health guidance

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  • KAWAKAMI Ryoko
    Health Promotion and Exercise Program, National Institute of Health and Nutrition
  • MIYACHI Motohiko
    Health Promotion and Exercise Program, National Institute of Health and Nutrition

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  • 特定健診・保健指導の標準的な質問票を用いた身体活動評価の妥当性
  • トクテイ ケンシン ホケン シドウ ノ ヒョウジュンテキ ナ シツモンヒョウ オ モチイタ シンタイ カツドウ ヒョウカ ノ ダトウセイ

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Purpose This study aimed to determine the validity of a standard questionnaire to assess amount of physical activity (PA) and cardiorespiratory fitness (VO2peak).<br/>Methods A total of 483 men and women, aged 20 to 69 years, participated. The standard questionnaire included 3 items about exercise, PA, and walking speed. All questions were designed to require an answer of Yes or No. Subjects were classified into one of four groups regarding the number of Yes answers to thee three questions, giving activity levels of 0 to 3. The amount of PA was measured objectively with a tri-axial accelerometer which could also calculate daily step counts, and the amounts of PA under 3 metabolic equivalents (METs) and at 3 METs or more. VO2peak was measured by incremental cycle exercise tests with indirect calorimetry.<br/>Results The daily step counts, the amount of PA at 3 METs or more, and the VO2peak were significantly higher in subjects who answered Yes to each question than in those who answered No. Sensitivity and specificity of each question were 62~73% and 45~71% for the amount of PA established with the “Exercise and Physical Activity Reference for Health Promotion 2006 (EPAR2006)”. The sum of sensitivity and specificity was the highest when the cutoff value was activity level 2 (sensitivity 73%, specificity 68%). Sensitivity and specificity for VO2max established by EPAR2006 were lower than those for the amount of PA.<br/>Conclusion These results suggest that only answering simple questions with a standard questionnaire is sufficient for estimation of PA levels for specific medical checkups and health guidance, even though the accuracy is somewhat limited.

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