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The risk for COVID-19 progression is nearly double for smokers versus nonsmokers.

Meta-Analysis Links Smoking to COVID-19 Disease Progression

THURSDAY, May 14, 2020 (HealthDay News) -- Smokers have an increased likelihood of COVID-19 disease progression, according to research published online May 13 in Nicotine & Tobacco Research.

Roengrudee Patanavanich, M.D., Ph.D., and Stanton A. Glantz, Ph.D., from the University of California San Francisco, reviewed and summarized 19 papers presenting data on the link between smoking and severity of COVID-19.

The meta-analysis included 11,590 COVID-19 patients, 18.4 percent of whom experienced disease progression and 6.3 percent with a history of smoking. The researchers found that 29.8 versus 17.6 percent of patients with a history of smoking versus nonsmoking patients experienced disease progression. In the meta-analysis, an association was noted between smoking and COVID-19 progression (odds ratio, 1.91), with moderate heterogeneity among the studies (I² = 38 percent) and no significant evidence of publication bias (Harbord's P = 0.813; Peters' P = 0.941). In a sensitivity analysis of five studies of current smokers versus never smokers, the results were similar (odds ratio, 1.91), with no evidence of significant heterogeneity (I² = 53.5 percent) or publication bias (Harbord's P = 0.382; Peters' P = 0.512).

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Watch the in-depth discussion above, and see our past HD Lives and other videos on our YouTube channel.