A Chinese version of the Infertility Self-efficacy Scale: Reliability and validity assessment

Objective To translate, cross-culturally adapt and test the reliability and validity of a Chinese version of the Infertility Self-Efficacy scale. Methods The Infertility Self-Efficacy (ISE) scale was translated into Chinese using forward and backward translations, expert consultation, cognitive interviews and a pilot study. To test the scale’s reliability and validity, 515 infertile women in two hospitals were recruited to evaluate the Chinese version of the scale. Content validity was assessed by means of expert consultation. Exploratory factor and confirmatory factor analyses were performed using SPSS 26.0 and Amos 24.0. Reliability tests of the scale included Cronbach’s alpha coefficient, split-half reliability and test-retest reliability. Results The Chinese version of the ISE scale contains 16 items and one dimension. Content validity of the scale was 0.96. Results of exploratory factor analysis suggested that the one factor model was suitable for the scale, and factor loading of all items was greater than 0.4. Model fitting parameters of confirmatory factor analysis of the ISE scale were χ2/df =2.710, Root Mean Square Error Approximation (RMSEA)=0.079, Standardized Root Mean Square Residual (SRMR)=0.042, Comparative Fit Index (CFI)=0.953, and Tucker–Lewis Index (TLI)=0.939. Cronbach’s alpha coefficient of the Chinese ISE was 0.980; split-half coefficient was 0.972 and retest reliability was 0.848 (P<0.01). Conclusion The Chinese ISE scale is a reliable and valid instrument to evaluate the self-efficacy of infertile Chinese women.