showed a trendp = 0.485
Even ex-smoking status showed a trend of effect on protection against COVID-19 (HR 0.882, 95%CI 0.619–1.255, p = 0.485).
Even ex-smoking status showed a trend of effect on protection against COVID-19 (HR 0.882, 95%CI 0.619–1.255, p = 0.485).