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Psychiatry Journal
Volume 2016, Article ID 3475801, 7 pages
Research Article

Common Mental Disorders among Occupational Groups: Contributions of the Latent Class Model

1Physical Therapy Department, Federal University of Bahia (UFBA), Avenida Reitor Miguel Calmon s/n, Vale do Canela, 40.110-100 Salvador, BA, Brazil
2Department of Preventive and Social Medicine, Federal University of Bahia (UFBA), Avenida Reitor Miguel Calmon s/n, Vale do Canela, 40.110-100 Salvador, BA, Brazil
3Health Department, State University of Feira de Santana (UEFS), Avenida Transnordestina, s/n Novo Horizonte, 44036-900 Feira de Santana, BA, Brazil

Received 23 April 2016; Revised 10 July 2016; Accepted 25 July 2016

Academic Editor: Nicola Magnavita

Copyright © 2016 Kionna Oliveira Bernardes Santos et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. The Self-Reporting Questionnaire (SRQ-20) is widely used for evaluating common mental disorders. However, few studies have evaluated the SRQ-20 measurements performance in occupational groups. This study aimed to describe manifestation patterns of common mental disorders symptoms among workers populations, by using latent class analysis. Methods. Data derived from 9,959 Brazilian workers, obtained from four cross-sectional studies that used similar methodology, among groups of informal workers, teachers, healthcare workers, and urban workers. Common mental disorders were measured by using SRQ-20. Latent class analysis was performed on each database separately. Results. Three classes of symptoms were confirmed in the occupational categories investigated. In all studies, class I met better criteria for suspicion of common mental disorders. Class II discriminated workers with intermediate probability of answers to the items belonging to anxiety, sadness, and energy decrease that configure common mental disorders. Class III was composed of subgroups of workers with low probability to respond positively to questions for screening common mental disorders. Conclusions. Three patterns of symptoms of common mental disorders were identified in the occupational groups investigated, ranging from distinctive features to low probabilities of occurrence. The SRQ-20 measurements showed stability in capturing nonpsychotic symptoms.