Table 1.
Baseline patient characteristics of patients with and without reoperation before and after matching.
| Variables | Original cohort (n = 90263) |
Matched cohort (n = 1235) |
||||
|---|---|---|---|---|---|---|
| Reoperation (n = 247) | Nonreoperation (n = 90016) | P | Reoperation (n = 247) | Nonreoperation (n = 988) | P | |
| Age(years) | 61(52–67) | 59(50–66) | 0.018 | 61(52–67) | 62(56–66) | 0.123 |
| Sex | <0.001 | 1.000 | ||||
| Male | 193(78.1) | 39808(44.2) | 193(78.1) | 772(78.1) | ||
| Female | 54(21.9) | 50208(55.8) | 54(21.9) | 216(21.9) | ||
| BMI | 23.57(±2.93) | 22.90(±3.04) | 0.001 | 23.57(±2.93) | 23.32(±2.98) | 0.221 |
| Diagnosis | <0.001 | 0.263 | ||||
| Malignant disease | 206(83.4) | 80381(89.3) | 206(83.4) | 832(84.2) | ||
| Pulmonary tuberculosis | 16(6.5) | 484(0.5) | 16(6.5) | 48(4.9) | ||
| Bronchiectasis | 7(2.8) | 259(0.3) | 7(2.8) | 21(2.1) | ||
| Pulmonary bulla | 7(2.8) | 1377(1.5) | 7(2.8) | 16(1.6) | ||
| Others | 11(4.5) | 7515(8.3) | 11(4.5) | 71(7.2) | ||
| Type of surgery | <0.001 | 0.787 | ||||
| VATS | 179(72.5) | 76024(84.5) | 179(72.5) | 734(74.3) | ||
| RATS | 10(4) | 3088(3.4) | 10(4.0) | 42(4.3) | ||
| Thoracotomy | 58(23.5) | 10904(12.1) | 58(23.5) | 212(21.5) | ||
| Location of resection | <0.001 | 0.846 | ||||
| LU | 64(25.9) | 21448(23.8) | 64(25.9) | 241(24.4) | ||
| LL | 32(13.0) | 10638(11.8) | 32(13.0) | 121(12.2) | ||
| RU | 73(29.6) | 27201(30.2) | 73(29.6) | 319(32.3) | ||
| RM | 8(3.2) | 5747(6.4) | 8(3.2) | 46(4.7) | ||
| RL | 51(20.6) | 11949(13.3) | 51(20.6) | 185(18.7) | ||
| Multiple lobes | 19(7.7) | 13033(14.5) | 19(7.7) | 76(7.7) | ||
| Operative procedures | <0.001 | 0.129 | ||||
| Wedge resection | 23(9.3) | 17619(19.6) | 23(9.3) | 88(8.9) | ||
| Segmentectomy | 23(9.3) | 13455(14.9) | 23(9.3) | 96(9.7) | ||
| Lobectomy | 178(72.1) | 55812(62.0) | 178(72.1) | 740(74.9) | ||
| Pneumonectomy | 14(5.7) | 696(0.8) | 14(5.7) | 22(2.2) | ||
| Sleeve resection | 7(2.8) | 1108(1.2) | 7(2.8) | 31(3.1) | ||
| Bullectomy | 2(0.8) | 1326(1.5) | 2(0.8) | 11(1.1) | ||
| Year of surgery | <0.001 | 0.857 | ||||
| 2012–2013 | 60(24.3) | 7972(8.8) | 60(24.3) | 211(21.4) | ||
| 2014–2015 | 27(10.9) | 12005(13.3) | 27(10.9) | 107(10.8) | ||
| 2016–2017 | 32(13.0) | 19328(21.5) | 32(13.0) | 145(14.7) | ||
| 2018–2019 | 61(24.7) | 26686(29.7) | 61(24.7) | 243(24.6) | ||
| 2020–2021 | 67(27.1) | 24025(26.7) | 67(27.1) | 282(28.5) | ||
BMI: body mass index; VATS: video-assisted thoracic surgery; RATS: robot-assisted thoracic surgery; LU: left upper lobe; LL: left lower lobe; RU: right upper lobe; RM: right middle lobe; RL: right lower lobe.