Reliability and validity of Chinese version of measuring change in restriction of salt (sodium ) in diet in hypertensives / 中华行为医学与脑科学杂志

ABSTRACT

Objective:To develop the Chinese version of measuring change in restriction of salt (sodium ) in diet in hypertensives(MCRSDH), and to test its reliability and validity.Methods:Authorization was obtained from the original authors of MCRSDH.Cross-cultural revision of the MCRSDH was conducted according to the guidelines from November 2020 to January 2021.Totally 700 patients with hypertension were recruited through convenience sampling from 4 community health service centers in 2 main urban districts of Changsha and investigated by the Chinese version of MCRSDH.Reliability and validity of the scale were assessed.Results:The correlation coefficient between each item and the total score ranged from 0.327-0.799 and 0.468-0.893 in MCRSDH initiation (MCRSDH-INIT)and MCRSDH sustenance(MCRSDH-SUST) respectively.The item of content validity index(I-CVI) of each item ranged from 0.802 to 1.000, and the scale of content validity index(S-CVI) was 0.914.Four factors were extracted by exploratory factor analysis(EFA)and could explain 68.511% of the total variance for MCRSDH-INIT.Three factors were extracted by EFA and could explain 76.558% of the total variance for MCRSDH-SUST.Values of factor loading ranged from 0.541 to 0.926 for MCRSDH-INIT, and from 0.586 to 0.888 for MCRSDH-SUST.The Confirmatory factor analysis indicated that χ 2/ df=1.732, GFI=0.902, CFI=0.945, RMSEA=0.046, NFI=0.931, TLI=0.936 for initiation model and χ 2/ df=1.248, GFI=0.937, CFI=0.971, RMSEA=0.018, NFI=0.943, TLI=0.937 for sustenance model.The cronbach's α coefficient of the scale was 0.901 and the test-retest reliability was 0.917. Conclusion:The Chinese version of the MCRSDH is reliable and valid, and can be used as a tool to MCRSDH in China.