Symptoms of depression were evaluated based on the Patient Health Questionnaire (PHQ-9) depression module, with questions taken from the National Health and Nutrition Examination Survey --created by the Centers for Disease Control and Prevention's National Center for Health Statistics --and the standardized Job Content Questionnaire
(JCQ) (Environ Health.
The Job Content Questionnaire
(JCQ) [1,2] and the Swedish version of the JCQ, called the Demand-Control Questionnaire (DCQ) , have been widely used in occupational epidemiological studies, particularly on the job strain and cardiovascular disease (CVD) [4-6].
Job Content Questionnaire
. Organizational social support was assessed using the subscales measuring supervisor and coworker support from the social support scale in the Job Content Questionnaire
(JCQ; Karasek et al., 1998).
Two well established job characteristics in the job stress literature were evaluated with the Job Content Questionnaire
(Karasek, 1985; Karasek et al., 1998): (a) Job demand (9 items: My job requires me to work very hard): measures the degree of psychological work-load ([alpha] = .70); (b) Job support (11 items: The people I work with are friendly): taps useful social interaction at the job place ([alpha] = .87).
Supervision and Social Support were measured using their respective subscales from the Job Content Questionnaire
(JCQ) (Karasek et al 1998).
In this study, a Spanish version of the Job Content Questionnaire
(JCQ) was tested in Colombia.
The psychosocial work environment was assessed using an abbreviated measure of the Job Content Questionnaire
The instruments used were Karasek's Job Content Questionnaire
(JCQ), previously validated in Mexico by Cedillo (1999, cited in Juarez-Garcia, 2004), the Questionnaire of Personal Control (Juarez-Garcia, 2004a, cited in Juarez-Garcia, 2004) and the General Health Questionnaire, previously validated for Mexico by Medina, Padilla, Campillo, Caraveo, and Corona in 1983 (cited in Juarez-Garcia, 2004).
Job demands, job autonomy and workplace social support were assessed with Karasek's (1985) Job Content Questionnaire
(JCQ; using a validated Dutch questionnaire: Van der Doef & Maes, 1999b).