Table 6 Postoperative complications based on pack-years of smoking before surgery
Variables | Non-smokers (n = 1413) | Smokers (n = 1056) | P value | ||
|---|---|---|---|---|---|
≤ 20 pack-years (n = 164) | 20 to 40 pack-years (n = 522) | ≥ 40 pack-years (n = 370) | |||
Complicationsa | 143 (10.1%) | 13 (7.9%) | 72 (13.8%) | 65 (17.6%) | < 0.001 |
Surgical site infection | 59 (4.2%) | 6 (3.7%) | 22 (4.2%) | 29 (7.8%) | 0.022 |
Pulmonary complication | 46 (3.3%) | 2 (1.2%) | 31 (5.9%) | 21 (5.7%) | 0.005 |
Bleeding | 12 (0.8%) | 3 (1.8%) | 4 (0.8%) | 5 (1.4%) | 0.521 |
Others | 26 (1.8%) | 2 (1.2%) | 15 (2.9%) | 10 (2.7%) | 0.367 |
Severity of complicationsb | 0.001 | ||||
Minor (grade II) | 104 (7.4%) | 6 (3.7%) | 52 (10.0%) | 44 (11.9%) | |
Major (grade III or greater) | 39 (2.8%) | 7 (4.3%) | 20 (3.8%) | 21 (5.7%) | |