[Purpose] We tested the reliability and validity of the Japanese version of the Short
Questionnaire to Assess Health-enhancing Physical Activity scale in asymptomatic older
adults and sought to confirm discriminator validity in women with osteoarthritis.
[Subjects] The participants included an asymptomatic comparison group (men and women) and
women with knee or hip osteoarthritis. [Methods] The test-retest method was used to assess
reliability. The International Physical Activity Questionnaire was chosen to assess
criterion-related validity. Discriminator validity was assessed by comparing the
asymptomatic and osteoarthritis groups. [Results] Mean age for the asymptomatic groups was
63 ± 6 years for men (n = 23) and 61 ± 7 years for women (n = 51), and it was 63 ± 9 years
for the osteoarthritis group (n = 32). The total score and scores for all items, except
for heavy housework items, were significantly correlated with the retest.
Criterion-related validity showed significantly weak to moderate correlations between the
respective scale categories. For discriminator validity, the total scores and scores for
bicycle commuting, light housework, and three leisure items differed significantly between
the asymptomatic and osteoarthritis groups. [Conclusion] The Short Questionnaire to Assess
Health-enhancing Physical Activity scale is a reliable and valid measure in asymptomatic
older adults, and can discriminate between osteoarthritic and asymptomatic women.
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