Table 2

Risk of lung cancer related to ever having worked in ISCO-68 major occupational groups (compared with those that have not worked in respective group) stratified by sex

ISCO-68 major groupsEver worked
(cases/controls)
Model 0*
OR (95% CI)
Model 1†
OR (95% CI)
Model 2‡
OR (95% CI)
MaleFemaleMaleFemaleMaleFemaleMaleFemale
0/1: Professional, technical and related workers37/3199/740.5 (0.3 to 0.7)0.8 (0.3 to 1.7)0.6 (0.4 to 0.9)0.8 (0.4 to 1.7)0.8 (0.5 to 1.1)0.9 (0.4 to 1.8)
2: Administrative and managerial workers8/932/110.4 (0.2 to 0.8)1.4 (0.3 to 6.4)0.4 (0.2 to 0.7)1.1 (0.2 to 5.8)0.4 (0.2 to 1.0)1.5 (0.3 to 7.5)
3: Clerical and related workers31/2522/230.5 (0.3 to 0.7)0.6 (0.1 to 2.6)0.6 (0.4 to 1.0)0.5 (0.1 to 2.3)0.7 (0.5 to 1.1)0.6 (0.1 to 2.7)
4: Sales workers62/2823/161.1 (0.8 to 1.5)1.5 (0.4 to 5.6)1.0 (0.7 to 1.4)1.5 (0.4 to 5.5)1.0 (0.7 to 1.4)1.1 (0.3 to 5.1)
5: Service workers40/1471/541.1 (0.8 to 1.6)0.1 (0.0 to 1.0)1.1 (0.7 to 1.7)0.1 (0.0 to 0.9)1.2 (0.8 to 1.9)0.1 (0.0 to 1.2)
6: Agricultural, animal husbandry and forest161/67818/691.2 (0.9 to 1.5)2.3 (1.2 to 4.5)1.1 (0.9 to 1.4)2.4 (1.2 to 4.6)1.0 (0.8 to 1.3)2.6 (1.3 to 5.3)
7: Craft and related trades workers41/19611/750.9 (0.6 to 1.4)1.0 (0.5 to 2.0)0.9 (0.6 to 1.3)1.0 (0.5 to 2.0)0.9 (0.6 to 1.4)0.9 (0.4 to 2.0)
8: Plant and machine operators61/2290/31.4 (1.0 to 1.9)No cases1.1 (0.8 to 1.6)No cases0.9 (0.6 to 1.3)No cases
9: Elementary occupations187/7232/81.4 (1.2 to 1.7)2.2 (0.4 to 11.4)1.2 (1.0 to 1.5)1.6 (0.2 to 8.9)1.2 (0.9 to 1.5)1.7 (0.3 to 9.5)
X: Military force14/1470.4 (0.2 to 0.7)0.5 (0.2 to 0.8)0.5 (0.2 to 0.9)
XI: Housewives132/8740.9 (0.5 to 1.5)0.9 (0.6 to 1.5)0.9 (0.5 to 1.5)
  • Each occupational group is individually compared with the respective remaining group of samples.

  • *Model 0 (M0) is adjusted for age categories (5-year categories) and residence (provinces).

  • †Model 1 (M1) is adjusted for M0 plus cigarette smoking status and intensity.

  • ‡Model 2 (M2) is adjusted for M1 plus opium consumption.

  • –, no data; ISCO-68, International Standard Classification of Occupations.