Occupational sitting and health risks: a systematic review.

Area of Science:

• Public Health
• Occupational Health
• Epidemiology

Background:

• Growing evidence links sedentary behavior, including prolonged occupational sitting, to adverse health outcomes.
• This systematic review consolidates current research on the association between workplace sitting and various health risks.

Purpose of the Study:

• To systematically review and synthesize the evidence regarding the associations between occupational sitting and specific health risks.
• To evaluate the quality of existing studies examining sedentary work and health outcomes.

Main Methods:

• Conducted comprehensive literature searches across multiple databases (PubMed, PsycINFO, etc.) up to April 2009.
• Included 43 studies examining occupational sitting and health outcomes like BMI, cancer, cardiovascular disease, diabetes mellitus, and mortality.
• Assessed study quality using a standardized 15-item rating scale, with two independent reviewers.

Main Results:

• Prospective studies did not confirm a causal link between occupational sitting and BMI or cancer, despite some cross-sectional or case-control evidence.
• A significant association was found between prolonged occupational sitting and increased risk of diabetes mellitus (DM) and mortality in most prospective studies.
• Median study quality was 12 out of 15, indicating moderate to good methodological rigor.

Conclusions:

• Limited evidence supports a definitive positive relationship between occupational sitting and most health risks examined.
• Heterogeneity in study designs, measurement of sitting time, and inconsistent findings hinder definitive conclusions.
• Further high-quality prospective research is warranted to clarify the health implications of occupational sitting.