Table 4. Risk factors of postoperative morbidity.
| Variable | Postoperative morbidity | Univariate analysis P | Multivariate analysis | |||
|---|---|---|---|---|---|---|
| No(n = 561) | Yes(n = 131) | OR | 95%CI | P | ||
| Age | 60.7 ± 10.1 | 62.8 ± 9.9 | 0.030 | 1.016 | 0.135 | |
| Gender | 0.135 | |||||
| Male | 438(78.1) | 70(84.0) | ||||
| Female | 123(21.9) | 18(16.0) | ||||
| BMI(kg/m2) | 22.0 ± 2.6 | 21.8 ± 2.5 | 0.201 | |||
| Tumor Location | 0.422 | |||||
| Upper | 302(53.8) | 77(58.8) | ||||
| Middle | 227(40.5) | 45(34.4) | ||||
| Total | 32(5.7) | 9(6.9) | ||||
| Operative approach | 0.009 | 0.596 | 0.009 | |||
| LATG | 294(52.4) | 52(39.7) | ||||
| OTG | 267(47.6) | 79(60.3) | ||||
| Tumor size(cm) | 6.1 ± 2.9 | 5.7 ± 2.6 | 0.191 | |||
| pT stage | 0.270 | |||||
| T1 | 51(9.1) | 17(13.0) | ||||
| T2 | 44(7.8) | 6(4.6) | ||||
| T3 | 99(17.7) | 27(20.6) | ||||
| T4a | 367(65.4) | 81(61.8) | ||||
| pN stage | 0.423 | |||||
| N0 | 127 (22.6) | 32(24.4) | ||||
| N1 | 83(14.8) | 26(19.8) | ||||
| N2 | 95(16.9) | 22(16.8) | ||||
| N3a | 146(26.0) | 33(25.2) | ||||
| N3b | 110(19.6) | 18(13.7) | ||||
| pTNM stage | 0.402 | |||||
| IA | 48(8.6) | 11(8.4) | ||||
| IB | 27(4.8) | 11(6.4) | ||||
| IIA | 30(5.3) | 5(3.8) | ||||
| IIB | 62(11.1) | 18(13.7) | ||||
| IIIA | 72(12.8) | 18(13.7) | ||||
| IIIB | 108(19.3) | 29(22.1) | ||||
| IIIC | 214(38.1) | 39(29.8) | ||||
| No. of comorbidities | 0.023 | 1.527 | 0.035 | |||
| 0 | 418(73.7) | 82(62.6) | ||||
| 1–2 | 138(25.6) | 47(35.9) | ||||
| ≥ 3 | 5(0.9) | 2(1.5) | ||||
| No. of retrieved lymph nodes | 30.9 ± 10.7 | 29.6 ± 10.2 | 0.212 | |||
| Operative time (min) | 241.8 ± 71.5 | 252.9 ± 83.3 | 0.121 | |||
| Estimated blood loss (ml) | 144.5 ± 155.8 | 171.1v193.0 | 0.094 | |||
OR: odds ratio; CI: confidence interval