Reliability (test-retest) of the Swedish "Demand-Control- Support Questionnaire" scale among industrial restaurants workers, state of Rio de Janeiro, Brazil

Abstract Objective: This study aims to verify the test-retest reliability of the Portuguese version of the Swedish “ Demand-Control-Support Questionnaire (DCSQ)” scale in a population of workers with low education. Method : The questionnaire was adminis-tered to 52 employees of three restaurants in industrial companies in Rio de Janeiro twice, with intervals from 7 to 15 days. As indicators of stability, the Intraclass Cor-relation Coefficient (ICC), weighted Kappa statistics and Bland and Altman’s plot were used; for internal consistency evaluation, Cronbach’s alpha coefficient was used. Results : The ICCs for the “psychological demand”, “decision latitude” and “social support in the workplace” dimensions were 0.70, 0.68 and 0.80, respectively. Cronbach’s alpha showed the following results in the retest for the previously mentioned di-mensions: 0.75, 0.50 and 0.82, respectively. Conclusions : Although the outcome of the Demand-Control scale has been considered low for Cronbach’s alpha, other reliability indicators point to good stability of the in-strument, allowing its use in studies on the association between job stress and health-related outcomes.

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