Validity and Reliability of Japanese-Language Self-reported Measures for Assessing Adults Domain-Specific Sedentary Time

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  • Ishii Kaori
    Faculty of Sport Sciences, Waseda University
  • Shibata Ai
    Faculty of Health and Sport Sciences, University of Tsukuba
  • Kurita Satoshi
    Graduate School of Sport Sciences, Waseda University
  • Yano Shohei
    Graduate School of Sport Sciences, Waseda University
  • Inoue Shigeru
    Department of Preventive Medicine and Public Health, Tokyo Medical University
  • Sugiyama Takemi
    Institute for Health & Ageing, Australian Catholic University
  • Owen Neville
    Swinburne University of Technology Behavioural Epidemiology Laboratory, Baker IDI Heart and Diabetes Institute
  • Oka Koichiro
    Faculty of Sport Sciences, Waseda University

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Abstract

<p>Background: Good quality measures of Japanese adults’ sedentary behaviors are needed to accurately assess correlates of specific sedentary behaviors. The present study assessed criterion validity of total sedentary behavior and test-retest reliability of six domain-specific sedentary behaviors.</p><p>Methods: We administered a questionnaire, based on previous studies, that measured domain-specific sedentary behaviors. To examine validity, agreement between self-reported time spent in sedentary behaviors from the questionnaire and objectively-measured sedentary time using accelerometers was compared among 392 adults (aged 40–64 years) in two Japanese cities. For reliability, a 2-week interval test-retest was administered to a convenience sample of 34 participants.</p><p>Results: The correlation between total self-reported and objectively measured sedentary time was significant (all P < 0.001) and fair-to-good for workdays (ρ = 0.57) and whole week (ρ = 0.49), but was low for non-workdays (ρ = 0.23). The difference between the two measures was significant for whole week (z = −2.25, P = 0.03) and non-workdays (z = −5.50, P < 0.001), but was not significant for workdays (z = −0.60, P = 0.55). There was a significant positive association between the difference in the two measures and the average of these two measures (workdays: r = 0.53; non-workdays: r = 0.45; and whole week: r = 0.54, all P < 0.001). There was fair-to-good test-retest reliability of total sedentary time for each domain (workdays: interclass correlation coefficient [ICC] = 0.77, non-workdays: ICC = 0.53, and whole week: ICC = 0.7; all P < 0.01).</p><p>Conclusions: The scale of domain-specific sedentary behaviors is reliable for estimating where and for what purpose Japanese adults spend their sedentary time, and total sedentary time is valid for workdays and the whole week.</p>

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