Table 3 Perioperative outcomes in the whole cohort before and after propensity score matching
Clinical records | Before PSM | After PSM | ||||||
|---|---|---|---|---|---|---|---|---|
Uniportal cohort (n = 58) | Three-port cohort (n = 524) | Z/X2-value | p-value | Uniportal cohort (n = 57) | Three-port cohort (n = 57) | Z/X2-value | p-value | |
Intraoperative blood loss (mL) | 50(20, 83) | 75(20, 83) | —1.95 | 0.05 | 50(20, 83) | 80(25, 83) | —1.68 | 0.09 |
Operation time (min) | 108(84, 131) | 110(76, 149) | —0.04 | 0.97 | 110(85, 132) | 110(73, 133) | —0.51 | 0.61 |
Conversion to thoracotomy rate | 4(6.90%) | 20(3.80%) | 0.60 | 0.44 | 4(7.00%) | 2(3.50%) | 0.18 | 0.68 |
Lymph node dissection | 1.64 | 0.44 | 0.54 | 0.76 | ||||
Nodal dissection | 48(82.80%) | 441(84.20%) | 48(84.20%) | 49(86.00%) | ||||
Nodal sampling | 7(12.10%) | 41(7.80%) | 7(12.30%) | 5(8.80%) | ||||
No nodal dissection | 3(5.20%) | 42(8.00%) | 2(3.50%) | 3(5.30%) | ||||
Overall number of lymph nodes dissected | 10(5, 18)a | 9(6, 14)b | —1.02 | 0.31 | 8(5, 16)c | 7(4, 13)d | —0.84 | 0.40 |
Overall number of lymph node stations dissected | 5(3, 6)a | 5(3, 6)b | —0.52 | 0.60 | 5(3, 6)c | 5(3, 6)d | —0.01 | > 0.99 |
Postoperative thoracic drainage (mL) | ||||||||
Within postoperative 3 days | 480(349, 733) | 495(260, 805) | —0.24 | 0.81 | 500(348, 745) | 520(315, 850) | —0.32 | 0.75 |
Total | 655(373, 1093) | 570(270, 1125) | —0.67 | 0.50 | 660(365, 1095) | 560(315, 1123) | —0.39 | 0.70 |
Duration of thoracic drainage (day) | 3(2, 5) | 3(2, 5) | —0.71 | 0.48 | 3(2, 5) | 3(2, 5) | —0.88 | 0.38 |
Postoperative length of stay (day) | 6(4, 9) | 6(4, 8) | —0.36 | 0.72 | 6(4, 9) | 5(4, 7) | —0.57 | 0.57 |
Hospitalization expenses (¥) | 54,004.42 (50,285.98, 60,978.32) | 54,320.23 (46,887.35, 61,897.48) | —0.77 | 0.44 | 53,988.58 (50,281.47, 61,665.97) | 56,537.34 (48,606.79, 67,027.76) | —1.30 | 0.20 |