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Retrospective Cohort Study
Copyright: ©Author(s) 2026.
World J Gastrointest Surg. Sep 27, 2026; 18(9): 121221
Published online Sep 27, 2026. doi: 10.4240/wjgs.121221
Table 1 Baseline characteristics and preoperative risk profile, n (%)/mean ± SD
Variable
Control group
Observation group
Test
P value
Age (years)61.17 ± 9.4062.68 ± 8.14Welch t0.368
BMI (kg/m2)22.77 ± 2.7723.35 ± 2.76Welch t0.273
FEV1 (L)2 ± 0.441.93 ± 0.40Welch t0.432
FEV1/FVC (%)67.03 ± 7.6868.92 ± 9.18Welch t0.250
Albumin (g/L)38.44 ± 3.4139.11 ± 3.37Welch t0.305
Hemoglobin (g/L)120.82 ± 13.39124.58 ± 12.40Welch t0.129
Genderχ2 test0.533
    Female15 (25)10 (20)
    Male45 (75)40 (80)
Smoking historyχ2 test0.330
    No28 (46.70)28 (56)
    Yes32 (53.30)22 (44)
COPD or other chronic lung diseaseχ2 test0.036
    No49 (81.70)32 (64)
    Yes11 (18.30)18 (36)
Hypertensionχ2 test0.385
    No36 (60)34 (68)
    Yes24 (40)16 (32)
Diabetesχ2 test0.541
    No49 (81.70)43 (86)
    Yes11 (18.30)7 (14)
ASA classχ2 test0.997
    111 (18.30)9 (18)
    238 (63.30)32 (64)
    311 (18.30)9 (18)
    40 (0)0 (0)
Tumor locationχ2 test0.663
    Upper15 (25)9 (18)
    Middle24 (40)21 (42)
    Lower21 (35)20 (40)
cT stageχ2 test0.637
    129 (48.30)20 (40)
    223 (38.30)21 (42)
    38 (13.30)9 (18)
    40 (0)0 (0)
cN stageχ2 test0.905
    045 (75)37 (74)
    115 (25)13 (26)
    20 (0)0 (0)
    30 (0)0 (0)
Neoadjuvant therapyχ2 test0.610
    No40 (66.70)31 (62)
    Yes20 (33.30)19 (38)


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