Table 2

Sex-specific pooled relative risks (RR) and ratio of relative risks (RRR) for lung cancer associated with smoking

RR in womenRR in menRRR
Age adjusted
 Former versus never2.82 (2.25 to 3.54)3.01 (2.23 to 4.08)0.88 (0.69 to 1.14)
 Current versus not7.48 (5.29 to 10.60)8.78 (6.13 to 12.57)0.81 (0.62 to 1.04)
Multiple adjusted
 Former versus never3.14 (2.45 to 4.03)3.13 (2.06 to 4.76)0.89 (0.69 to 1.13)
 Current versus not6.99 (5.09 to 9.59)7.33 (4.90 to 10.96)0.92 (0.72 to 1.16)
Maximum adjusted
 Former versus never2.92 (2.35 to 3.63)3.08 (2.31 to 4.11)0.86 (0.71 to 1.05)
 Current versus not7.32 (5.58 to 9.61)8.05 (5.90 to 10.98)0.89 (0.73 to 1.08)
Cigarettes per day among current smokers versus never (maximum available adjusted)
 10 or less5.30 (3.52 to 7.97)4.97 (2.74 to 9.03)0.99 (0.65 to 1.52)
 10 to 1910.67 (7.43 to 15.33)8.93 (4.90 to 16.28)1.11 (0.75 to 1.64)
 20 or more17.09 (12.11 to 24.11)14.61 (8.33 to 25.59)0.94 (0.69 to 1.30)
  • Multiple adjusted includes anything that adjusted for more than just age. Maximum available adjustment refers to the most adjustments provided in the study. For some studies, this would have been age adjusted whereas other studies adjusted for more factors than age only (ie, multiple adjusted). These covariates are listed in table 1.