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Table 1 Smoking status of COVID-19 patients

From: Impact of air pollution and smoking on COVID-19: a review

No. of subjects studied No. of deaths reported Others (severe and non-severe) Current smokers Former smokers
191 patients [71] 54 137 9% (died)
4% (others)
No information
140 patients [72] Nil 58 severe
82 non-severe
3.4% (severe)
0% (non-severe)
6.9% (severe)
3.7% (non-severe)
41 patients [22] 6 7 severe
28 non-severe
0% (severe)
11% (non-severe)
No information
1099 patients [73] Nil 173 severe
926 non-severe
16.9% (severe)
11.8% (non-severe)
5.2% (severe)
1.3% (non-severe)
78 patients [74] 2 9 severe
67 non- severe
27.3% of smokers (death and severe)
3% of smokers (non-severe)