“…21 A subgroup analysis found no significant association between the definition of smoking and the risk of NMSC (cur-* References 8,11,15,17,24,25,[27][28][29]34,35. †References 7,9,[12][13][14]16,[21][22][23]26,[30][31][32][33]. 21 reported no significant association between the risk of NMSC and smoking more than 20 years (P = .1); however, a borderline-significant 41% decrease in the risk of NMSC was seen in another study (OR, 0.59; 95% CI, 0.35-1.01).…”