4.5 Article

A review of the association between cigarette smoking and the development of nonspecific back pain and related outcomes

Journal

SPINE
Volume 25, Issue 8, Pages 995-1014

Publisher

LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00007632-200004150-00016

Keywords

back pain; review; smoking; tobacco smoke pollution

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Study Design. A structured review of the epidemiologic literature was performed. Thirty-eight studies published in peer-reviewed journals were reviewed, The methodologic strengths and weaknesses of the studies were: described and assessed qualitatively. Four studies were excluded because of difficulties in design or interpretation. Objectives. To provide a systematic analysis of the literature to assess the evidence as to whether smoking is associated with the prevalence and incidence of nonspecific back back pain and related outcomes. Summary of Background Data. Evidence has been gathering regarding the association of smoking with nonspecific back pain acid other back disorders, but a comprehensive summary and evaluation of the data have not been published. Results. Positive associations between current smoking and nonspecific back pain were found in 18 of 26 studies in men and 18 of 20 studies in women, for sciatica and herniated discs, there were four of eight and one of five positive studies in men and women, respectively. The majority of these studies were cross-sectional (18 in men and 16 in women), with only a handful of prospective studies. Positive associations between past smoking and nonspecific back pain were reported in five of nine studies in men and five of six studies in women. In addition, increases in the prevalence and/or incidence of nonspecific back pain were found in the majority of studies in which level of consumption was analyzed and reported, An attempt was made to assess whether these results could be artifactual arising from selection bias, confounding bias, publication bias, or errors in measurement. As well, the biologic mechanisms were summarized that have been suggested by various investigators. Conclusions. The available data are consistent with the notion that smoking is associated with the incidence and prevalence of nonspecific back pain, but there are too few studies to make any conclusions for the other end points (e.g., scatca, herniated discs). It cannot be ruled out that the association is a statistical artifact arising from either selection or confounding factors, because the evidence for nonspecific low back pain derives mostly from cross-sectional studies. In addition,it cannot be stated unequivocally that smoking preceded back pain. Long term follow-up studies are needed to eliminate the possibility that chronic back pain preceded smoking, to better estimate dose-response correlations, and to perform biologic measurements to elucidate possible mechanisms.

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