Table 4

ORs and 95% CIs of postoperative complications and 30-day mortality

Target organs/tissues of surgeryPostoperative complications30-day mortality
OR (95% CI)P valueOR (95% CI)P value
Whole1.15 (1.13 to 1.17)<0.0011.22 (1.08 to 1.39)0.002
Skin or subcutaneous tissues1.18 (1.14 to 1.23)<0.0011.15 (0.85 to 1.56)0.370
Muscle, bone, limb or trunk1.12 (1.07 to 1.17)<0.0011.39 (0.74 to 2.60)0.306
Nervous system, head or CNS1.21 (1.08 to 1.34)<0.0012.99 (1.33 to 6.72)0.008
Eyes1.01 (0.89 to 1.13)0.932<0.01 (<0.01–>999.9)0.947
Ear, nose or throat1.19 (1.09 to 1.29)<0.0011.46 (0.81 to 2.64)0.209
Face, mouth or neck1.06 (0.95 to 1.18)0.3320.93 (0.06 to 14.81)0.956
Chest1.34 (1.27 to 1.42)<0.0010.95 (0.63 to 1.43)0.790
Cardiovascular1.25 (1.20 to 1.31)<0.0011.22 (0.96 to 1.55)0.111
Abdomen1.08 (1.05 to 1.11)<0.0011.17 (0.98 to 1.40)0.088
Urological system or adrenal gland1.10 (1.03 to 1.17)0.0020.90 (0.51 to 1.59)0.725
Genital1.09 (1.04 to 1.15)<0.0010.80 (0.13 to 4.79)0.806
  • ORs were calculated by using a logistic regression model to obtain the relative risk of ever-smokers compared with that of never-smokers (reference).