Table 3 Association between long-term heavy smoking and CRC deaths
Non-smokers | Mild-medium smokers | Long-term heavy smokers | |||||||
|---|---|---|---|---|---|---|---|---|---|
Control (%) | Case (%) | Control (%) | Case (%) | OR (95% CI) a | Control (%) | Case (%) | OR (95% CI) a | P for trend | |
Urban men | 4510 (43.90) | 2180 (42.44) | 4112 (40.02) | 1960 (38.15) | 0.984 (0.913–1.060) | 1652 (16.08) | 997 (19.41) | 1.250 (1.138–1.373) | <0.001 |
Foreland region in north China | 1360 (48.89) | 657 (47.23) | 1101 (39.58) | 546 (39.25) | 1.024 (0.890–1.178) | 321 (11.54) | 188 (13.52) | 1.212 (0.990–1.485) | 0.109 |
Foreland region in south China | 1760 (43.35) | 902 (44.43) | 1512 (37.24) | 644 (31.72) | 0.829 (0.733–0.937) | 788 (19.41) | 484 (23.84) | 1.202 (1.046–1.382) | 0.110 |
Inland region in north China | 571 (50.44) | 270 (47.70) | 449 (39.66) | 231 (40.81) | 1.085 (0.874–1.347) | 112 (9.89) | 65 (11.48) | 1.235 (0.880–1.732) | 0.208 |
Inland region in south China | 819 (35.61) | 351 (30.52) | 1050 (45.65) | 539 (46.87) | 1.198 (1.018–1.411) | 431 (18.74) | 260 (22.61) | 1.401 (1.149–1.710) | 0.001 |
Urban women | 8322 (83.40) | 4108 (82.34) | 1427 (14.30) | 708 (14.19) | 0.996 (0.903–1.098) | 229 (2.30) | 173 (3.47) | 1.512 (1.236–1.850) | <0.001 |
Foreland region in north China | 1951 (75.97) | 946 (73.68) | 548 (21.65) | 278 (21.34) | 1.043 (0.885–1.229) | 69 (2.69) | 60 (4.67) | 1.800 (1.262–2.568) | 0.016 |
Forland region in south China | 3501 (84.57) | 1754 (84.73) | 537 (12.97) | 246 (11.88) | 0.897 (0.762–1.055) | 102 (2.46) | 70 (3.38) | 1.344 (0.985–1.833) | 0.538 |
Inland region in north China | 969 (85.75) | 476 (84.25) | 141 (12.48) | 71 (12.57) | 1.015 (0.747–1.379) | 20 (1.77) | 18 (3.19) | 1.796 (0.939–3.437) | 0.188 |
Inland region in south China | 1901 (88.83) | 932 (87.10) | 201 (9.39) | 113 (10.56) | 1.138 (0.891–1.454) | 38 (1.78) | 25 (2.34) | 1.321 (0.792–2.205) | 0.123 |
Rural men | 1132 (37.14) | 480 (31.50) | 1454 (47.70) | 732 (48.03) | 1.193 (1.037–1.372) | 462 (15.16) | 312 (20.47) | 1.604 (1.341–1.919) | <0.001 |
Foreland region in north China | 142 (52.59) | 68 (50.37) | 106 (39.26) | 54 (40.00) | 1.062 (0.682–1.652) | 22 (8.15) | 13 (9.63) | 1.222 (0.579–2.577) | 0.587 |
Foreland region in south China | 522 (33.12) | 214 (27.16) | 731 (46.38) | 364 (46.19) | 1.205 (0.993–1.498) | 323 (20.49) | 210 (26.65) | 1.598 (1.262–2.024) | <0.001 |
Inland region in north China | 254 (42.19) | 111 (36.88) | 305 (50.66) | 156 (51.83) | 1.183 (0.878–1.592) | 43 (7.14) | 34 (11.30) | 1.854 (1.120–3.069) | 0.031 |
Inland region in south China | 214 (35.67) | 87 (29.00) | 312 (52.00) | 158 (52.67) | 1.245 (0.909–1.705) | 74 (12.33) | 55 (18.33) | 1.796 (1.166–2.768) | 0.007 |
Rural women | 2364 (91.49) | 1168 (90.40) | 205 (7.93) | 110 (8.51) | 1.074 (0.843–1.369) | 15 (0.58) | 14 (1.08) | 1.864 (0.896–3.876) | 0.016 |
Foreland region in north China | 227 (91.53) | 112 (90.32) | 20 (8.06) | 11 (8.87) | 1.115 (0.516–2.407) | 1 (0.40) | 1 (0.81) | 1.926 (0.119–31.184) | — |
Foreland region in south China | 1375 (91.91) | 680 (90.91) | 109 (7.29) | 58 (7.75) | 1.076 (0.772–1.499) | 12 (0.8) | 10 (1.34) | 1.665 (0.715–3.876) | 0.289 |
Inland region in north China | 380 (90.91) | 185 (88.52) | 38 (9.09) | 22 (10.53) | 1.189 (0.684–2.069) | 0 | 2 (0.96) | — | — |
Inland region in south China | 382 (90.52) | 191 (90.52) | 38 (9.00) | 19 (9.00) | 1.000 (0.561–1.782) | 2 (0.47) | 1 (0.47) | 1.014 (0.091–11.265) | — |
Total | 16 328 (63.08) | 79.36 (61.32) | 7198 (27.81) | 3510 (27.12) | 1.003 (0.956–1.053) | 2358 (9.11) | 1496 (11.56) | 1.302 (1.214–1.397) | <0.001 |
