Table 1 characteristics of patients in the model group and the validation group
Factors | Model (n = 323) | Validation (n = 150) | P | ||||
|---|---|---|---|---|---|---|---|
Patient related factors | |||||||
Age(years, \(\stackrel{-}{x}\pm s\)) | 59.5 ± 11.6 | 59.3 ± 10.8 | 0.829 | ||||
Gender, n = No (%) | 0.442 | ||||||
Female | 111(34.4%) | 57(38.0%) | |||||
Male | 212(65.6%) | 93(62.0%) | |||||
AL | 0.483 | ||||||
Yes | 26(8.0%) | 15(10.0%) | |||||
No | 297(92.0%) | 135(90.0%) | |||||
Smoking, n = No (%) | 0.201 | ||||||
Yes | 85(26.3%) | 48(32.0%) | |||||
No | 238(73.7%) | 102(68.0%) | |||||
Alcohol excess, n = No (%) | 0.296 | ||||||
Yes | 76(23.5%) | 42(28.0%) | |||||
No | 247(76.5%) | 108(72.0%) | |||||
Previous history of malignancy, n = No (%) | 0.704 | ||||||
Yes | 37(11.5%) | 19(12.7%) | |||||
No | 286(88.5%) | 131(87.3%) | |||||
BMI(kg/m2, \(\stackrel{-}{x}\pm s\)) | 22.5 ± 2.7 | 22.8 ± 2.6 | 0.335 | ||||
HbA1c, n = No (%) | |||||||
≤ 6.3% | 304(94.1%) | 141(94.0%) | 0.960 | ||||
> 6.3% | 19(5.9%) | 9(6.0%) | |||||
Diabetes mellitus, n = No (%) | 0.936 | ||||||
Yes | 70(21.7%) | 33(22.0%) | |||||
No | 253(78.3%) | 117(78.0%) | |||||
Hypertension, n = No (%) | 0.632 | ||||||
Yes | 104(32.2%) | 45(30.0%) | |||||
No | 219(67.8%) | 105(70.0%) | |||||
PCT, n = No (%) | 0.338 | ||||||
Yes | 49(15.2%) | 28(18.7%) | |||||
No | 274(84.8%) | 122(81.3%) | |||||
ASA grade, n = No (%) | 0.547 | ||||||
3 | 38(11.8%) | 13(8.7%) | |||||
2 | 98(30.3%) | 50(33.3%) | |||||
1 | 187(57.9%) | 87(58.0%) | |||||
Surgical related factors | |||||||
Operation time(min) | 0.162 | ||||||
Median(IQR) | 170(155, 190) | 180(155, 210) | |||||
Intraoperative blood loss (ml) | 0.836 | ||||||
Median(IQR) | 40 (40,50) | 40 (40,50) | |||||
LCA preservation, n = No (%) | 0.435 | ||||||
Yes | 280(86.7%) | 126(84.0%) | |||||
No | 43(13.3%) | 24(16.0%) | |||||
Number of staples fired, n = No (%) | 0.192 | ||||||
1 or 2 | 262(81.1%) | 129(86.0%) | |||||
>2 | 61(18.9%) | 21(14.0%) | |||||
Surgical approach, n = No (%) | 0.212 | ||||||
Laparoscopic | 270(83.6%) | 132(88.0%) | |||||
Open | 53(16.4%) | 18(12.0%) | |||||
Tumor related factors | |||||||
TD, n = No (%) | 0.709 | ||||||
≥ 7 cm | 161(49.8%) | 72(48.0%) | |||||
< 7 cm | 162(50.2%) | 78(52.0%) | |||||
Pathological T stage, n = No (%) | 0.136 | ||||||
Tis, T1, T2, | 121(37.5%) | 67(44.7%) | |||||
T3 and T4 | 202(62.5%) | 83(55.3%) | |||||
Pathological N stage, n = No (%) | 0.905 | ||||||
N0 | 90(27.9%) | 41(27.3%) | |||||
N1 and N2 | 233(72.1%) | 109(72.7%) | |||||
TNM stage, n = No (%) | 0.126 | ||||||
I | 35(10.8%) | 10(6.7%) | |||||
II | 129(39.9%) | 73(48.7%) | |||||
III | 159(49.2%) | 67(44.7%) | |||||
Tumor histological differentiation, n = No (%) | 0.419 | ||||||
High | 126(39.0%) | 55(36.7%) | |||||
Moderate | 97(30.0%) | 54(36.0%) | |||||
Low | 100(31.0%) | 41(27.3%) | |||||