Cigarette smoking as a risk factor for influenza-associated mortality: evidence from an elderly cohort.

Influenza Other Respir Viruses · 2013 · PMC5855151 · PMID 22813463

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an increasing trendno p-value reported

Stratified analyses by smoking status showed an increasing trend of hazard ratio for all‐cause mortality from never smokers (1·013), ex‐smokers (1·048) and current smokers (1·053), but the estimates were only significant ( P < 0·05) in ex‐smokers.

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