Objective: Based on the accelerometer, the validity of the international physical activity questionnaire long version(IPAQ-L) and Bouchard diary were evaluated to measure the daily physical activity of Chinese adults aged 18-59 years old.
Methods: A total of 200 Chinese adults were recruited in Yinzhou District of Ningbo City in 2019, including 78 males and 122 females, the three age groups 18-29, 30-49, 50 and above accounted for 19. 5%, 61. 5% and 18. 0%, respectively. The volunteers wore Actigraph WGT3 x-BT three-dimensional accelerometer for 3 days, and completed the 3 consecutive days& apos; Bouchard diary and the IPAQ-L. The physical activity energy expenditure(PAEE), sedentary inactivity time, light physical activity time(LPA) and moderate-to-vigorous physical activity time(MVPA) measured by the three tools were estimated respectively. Spearman analysis was used to analyze the correlation, the Friedman test and the Bland-Altman plot were used to test the homogeneity of the three method.
Results: 196 volunteers were included in this study. The correlation coefficients of PAEE between IPAQ and diary and accelerometer were 0. 32 and 0. 58, respectively, the correlation coefficients of sedentary behavior were 0. 17, 0. 25, and LPA time was 0. 33, and the estimated IPAQ for MVPA time better than diary. The difference test result showed that, except for IPAQ in the measurement of MVPA, there was no statistical difference from the accelerometer measurement result(P=0. 684), and the difference between other estimated values and the accelerometer measurement result was statistically significant(P& lt; 0. 01), Bland-Altman plot result showed that the diary and IPAQ had good consistency in the measurement of PAEE and IPAQ in the estimation of MVPA time, but there was an overestimation in PAEE. In addition, IPAQ had poor validity in measuring sedentary behavior and LPA.
Conclusion: IPAQ and Bouchard diary have better validity in evaluating PAEE, and the diary is better than IPAQ. IPAQ has better validity in evaluating MVPA time, but has poor validity in estimating sedentary behavior and LPA time.
Keywords: Chinese adults; accelerometer; bouchard diary; international physical activity questionnaire; validation.