Abstract: Objective: To translate the Measuring Change in Physical Activity Questionnaire (MCPAQ) and test the reliability and validity of Chinese version of MCPAQ in hypertensives in China. Methods: We obtained authorization from the original authors of MCPAQ and conducted cross-cultural adaptation. Using the convenient sampling method, a survey of 636 hypertensive patients from 4 community health service centers in 2 main urban areas of Changsha City was conducted from November 2020 to January 2021 to test the reliability and validity of the scale. Results: The correlation coefficient between each item and the total score were from 0.350 to 0.815 and from 0.539 to 0.896 in MCPAQ initiation (MCPAQ-INIT) and MCPAQ sustenance (MCPAQ-SUST) respectively. The I-CVI of each item was from 0.837 to 1.000, and the S-CVI was 0.936. Exploratory factor analysis showed that the cumulative variance interpretation rate of the four common factors extracted by MCPAQ-INIT was 71.967%, the cumulative variance interpretation rate of the three factors extracted by MCPAQ-SUST was 74.589%, and the factor loading coefficient of each item of MCPAQ was from 0.492 to 0.921. The Confirmatory factor analysis indicated: χ2/df=1.847, GFI=0.910, CFI=0.936, RMSEA=0.043, NFI=0.924, TLI=0.898 for initiation model and χ2/df=1.722, GFI=0.942, CFI=0.967, RMSEA=0.021, NFI=0.937, TLI=0.901 for sustenance model. The Cronbach's α coefficient of the scale was 0.911 and the test-retest reliability was 0.898. Conclusion: The Chinese version of the MCPAQ is reliable and valid, and can be used as a tool to measuring change in physical activity in hypertensives in China.

Key words: hypertension; physical activity; scale; reliability; validity; cross-cultural adaptation