Psychometric properties of the UK and Italian versions of the HSE Stress Indicator Tool: A crosscultural investigation

The Health and Safety Executive Stress Indicator Tool is a short questionnaire developed in the UK for the screening of common psychosocial risk factors leading to work-related stress. Previous research has shown that in both UK and Italy the Tool fits the same seven-factor solution. Building upon previous findings, by using multiple-group confirmatory factor analysis we investigated the degree of measurement equivalence of the Italian version of the Tool with its original UK version. Furthermore, we advanced the validation of the Tool in Italy by exploring the correlations of its subscales with stress-related outcomes. Two samples of workers were available for analyses: 1298 Italian employees of private-sector organizations, and a sample of 7589 UK employees from organizations of the same type. Results replicated previous findings: a 7-factor solution of the Indicator Tool was found to be equivalent across the Italian and UK samples. Furthermore, the analyses supported factor variance and factor covariance equivalence in addition to metric equivalence. The Tool subscales showed significant correlations in the expected direction with stress-related outcomes. The Italian version of the Indicator Tool behaves strongly consistently with its UK version and may be used for the screening of psychosocial risks in Italian workplaces.