Occupational Medicine 2000;50:591-596
© 2000 Society of Occupational Medicine
Psychological and Occupational Predictive Factors for Back Pain among Employees of a University Hospital in Southern Spain
,
Preventive Medicine and Public Health Area
Mathematical Department Cadiz, Spain
Physiotherapy Area, ‘Puerta del Mar’ University Hospital Cadiz, Spain
Psychiatiy Department, University of Cadiz
Objectives: To identify the individual and occupational factors that are predictors for low back pain among the employees of a university hospital in southern Spain.
Methods: A transverse study was conducted in which the population used was the hospital employees who volunteered to participate. The information was obtained by using a questionnaire, which included demographic and anthropometric variables, habits, characteristics of the work done, and of any pain experienced. The mental health condition of subjects was measured using the GHQ-28, using a score of 
6 as the cut-off point. To study the variables associated with pain, crude odds ratios (ORs) were calculated (± 95% Cl) and adjusted according to a logistic regression model.
Results: One thousand one hundred and four subjects participated in the study but only 890 of these completed the questionnaire in full (rate of response, 35.7% of total employees). The population studied was notable for the high proportion of women, for subjects >41 years of age, and subjects who undertook little or no physical exercise. In addition, according to the GHQ-28 test, 29.9% of the total were ‘probable psychiatric cases’. The crude ORs were high in all the occupational categories in comparison with the doctors, with the exception of the maintenance, cleaning, and catering group. They were also higher among women, among subjects with poor mental health, and among women with one or more children. The adjusted ORs showed that having a GHQ-28 score of 6, and belonging to the auxiliary technician category, were independent risk factors for suffering low back pain. Being older than 41 years and in temporary employment were protective variables.
Conclusions: The presence of probable mental illness is the variable most strongly associated with the presence of low back pain in the population studied. Its diagnostic confirmation and appropriate treatment could contribute to reducing the prevalence of vertebral pains in this occupational group.
Keywords Health workers; low back pain; risk factors
Received 4 January 2000
Accepted 20 July 2000
Correspondence to: Dr I. Failde, Escuela Universitaria de Ciencias de Ia Salud, Universidad de Cádiz, C/ Duque de Nájera 18, 11002 Cádiz, Spain. Tel: +34 956 212988; fax: +34 956 224218; e-mail: inmaculada.failde{at}uca.es
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