Validity of the effort/reward imbalance questionnaire in health professionals from six Latin-American countries.

Background: This study tests the validity and the invariance of ERI questionnaire (ERIQ) data from health professionals in six different Latin-American countries.

Methods: One thousand two hundred ninety-two (1292) participants who worked in hospitals in Argentina, Chile, Colombia, Mexico, Peru and Venezuela completed the ERI and GHQ questionnaires. Partial correlations were carried out as well as reliability statistics and confirmatory factor analyses to examine factor structure and invariance of ERIQ in each subsample.