Journal
PREVENTIVE MEDICINE
Volume 37, Issue 4, Pages 283-290Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/S0091-7435(03)00110-5
Keywords
tobacco use cessation; cholesterol; triglycerides; meta-analysis
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Background. Cross-sectional studies revealed that cigarette smokers have lower high-density lipoprotein cholesterol (HDL-C) levels and higher levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), and triglycerides (TG) than nonsmokers. But prospective studies on the effects of cigarette smoking cessation on lipid profile have yielded inconclusive results. Methods. Relevant English articles were retrieved by keyword searches of MEDLINE (1966-October 2000), Cochrane Library (2000, Issue 2), and cited references. Twenty-seven studies met the following inclusion criteria: (1) prospective cohort study including clinical trials, (2) measuring smoking status and lipid profile of HDL-C, TC, LDL-C, and TG, (3) reporting the changes of lipid concentrations in abstinent smokers, and (4) not using adjuvant antihyperlipidemic drugs. Results. Overall Q statistics for net change of HDL-C, TC, LDL-C, and TG showed heterogeneity. Using a random-effects model, HDL-C level increased significantly {0.100 (CI 0.074 to 0.127) mmol/L) after smoking cessation. However, levels of TC ( +0.003 (CI -0.042 to 0.048)), LDL-C {-0.064 (CI -0.149 to 0.021), and TG {+0.028 (CI -0.014 to 0.071)) did not change significantly after smoking cessation. Conclusions. Cigarette smoking cessation increases serum levels of HDL-C but not of TC, LDL-C, and TG. (C) 2003 American Health Foundation and Elsevier Inc. All rights reserved.
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