Objective To translate and revise the Employees′ Perceptions of Breastfeeding Support Questionnaire (EPBS-Q) into Chinese, and to assess the reliability and validity of the Chinese version of the EPBS-Q (EPBS-Q-CV).

Methods We conducted translation and back translation of EPBS-Q first. Then the developed EPBS-Q-CV was revised through expert assessment, pre-survey and cognitive interviews. Finally, a total of 346 working mothers returning to work at children′s preventive health clinics in two general grade A tertiary hospitals in Zhengzhou city were recruited with convenient sampling and were administered with the revised EPBS-Q-CV to evaluate its reliability and validity.

Results The EPBS-Q-CV is composed of 30 items for 5 domains, with the overall Cronbach′s α coefficient of 0.917 and domains′ Cronbach′ s α coefficients ranging from 0.817 to 0.946. The composite reliability of the EPBS-Q-CV was 0.835-0.994 and its content validity index (I-CVI) for items were all > 0.80 and its scale-level content validity index (S-CVI) was 0.99. The values of average variance extracted (AVE) are relatively high for all the 5 domains of the EPBS-Q-CV and the square roots of the 5 domains′ AVE are all greater than the correlation coefficients between each domains, indicating good convergent, differential, and construct validity of the EPBS-Q-CV.

Conclusion The developed EPBS-Q-CV is a reliable and valid instrument when applied among Chinese working mothers.