Reliability And Validity Of The Chinese Version Of The International Physical Activity Questionnaires(Long Self-Administrated Format)

Objective: To evaluate the Reliability and validity of the Chinese version of the International Physical activity Questionnaires(Long self-Administrated Format) of 12-44-year-olds women in chengdu city.Method: Applying cluster sampling, according to the request to the age of investigation crowd,one community,one university and two middle school (including one high school and one junior high school) of chengdu were chose.the reliability study was conducted over a 28-d period,requiring three participant contacts(on the 1st-d,8st-d and 28st-d,respectively). In the validity study, participants completed the same assessments but also filled in Bouchard physical activity diary(PA diary) for seven days between visit 1 and visit 2. To compare the IPAQ's result with Bouchard physical activity diary's for validity study.According to date distribution,We analyzed Pearson or spearman' correlation coefficients for validity and interclass correlation coefficients for reliability。Result: 1) 125 People participated the reliability study, all of them completed the first questionnaire investigation, the second: 82.4% of them (103),the third: 97.6 % of them (122).There are 112 people to attend validity study, 91.96 %(103)of them up to standardo。2) The test-retest reliability of the Chinese version of IPAQ(Long self-Administrated Format):the ICC after one week: 0.373-0.962(mean:0.727), higher than interval three and four week's [ICC=0.437-0.936 for interval three week(mean:0.689), and 0.457-0.933 for interval four week(mean:0.667),respectively], but the ICC for interval three week same to the four's.The ICC for vigorous physical activity and leisure time physical activity were best (ICC=0.962,ICC=0.952 for interval one week, respectively); 3) validity: for middle intensity,vigorous intensity,total physical activity and sitting time, the correlation coefficients between IPAQ and PA diary were 0.394,0.657,0.535,0.588, respectively, the correlation for vigorous physical activity were best (r=0.657)。All correlation were statistically significant(P<0.01).Conclusion: The reliability and validity of IPAQ-C(Long self-Administrated Format) make it useful measure of physical activity for 12-44-year-olds women in chengdu city.