The SF-36 Questionnaire as a measurement of health-related quality of life: assessing short- and medium-term effects of exposure to tobacco versus the known long-term effects.

BACKGROUND: In order to determine the magnitude of the short- or medium-term effects of tobacco use on the health-related quality of life (HRQOL) of smokers and ex-smokers, and to compare them with the estimated long-term effects reported in other studies, a cross-sectional epidemiological study was designed. METHODS: A representative study of the general population over 14 years of age was conducted in the western health area of Valladolid, Spain. HRQOL was evaluated using the SF-36 Health Questionnaire. Differences in HRQOL among smokers, non-smokers, and former smokers were determined. Standardized scores from the general population and long-term effects of tobacco exposure were compared. RESULTS: Former smokers had a better HRQOL than smokers and non-smokers on the emotional dimensions, especially "vitality" and "role emotional", while differences between the groups on the physical and emotional dimensions did not reach statistical significance. Smokers displayed deterioration in "bodily pain", "general health", "vitality", "social function", and "role emotional", while deterioration in ex-smokers only occurred in "bodily pain" and "general health." The variable package/year was correlated with "general health." CONCLUSIONS: Short- and medium-range effects of tobacco consumption on HRQOL cannot be demonstrated with the SF-36 Health Questionnaire in the general Spanish population, whereas long-term effects can.