Table 1 General characteristics of 1243 patients

Male sex

801 (64.4%)

35 (66.0%)

766 (64.6%)

0.884

Age (years)

53.444 ± 9.389

62.151 ± 11.360

53.056 ± 9.105

< 0.001

BMI(kg/m²)

22.162 ± 3.095

24.032 ± 2.670

22.078 ± 3.086

< 0.001

Smoking history

256 (20.6%)

14 (26.4%)

242 (20.3%)

0.298

History of abdominal surgery

160(12.9%)

7(13.2%)

153(12.9%)

0.836

Preoperative pyloric obstruction

114(9.2%)

27(50.9%)

87(7.3%)

< 0.001

Preoperative albumin (g/L)

42.022 ± 4.344

41.556 ± 4.610

42.042 ± 4.333

0.435

Preoperative hemoglobin (g/L)

137.370 ± 12.745

131.415 ± 23.742

130.324 ± 12.041

0.741

Postoperative albumin (g/L)

34.139 ± 3.731

32.226 ± 4.060

34.135 ± 3.717

0.862

Postoperative hemoglobin (g/L)

115.930 ± 13.409

119.264 ± 22.059

115.782 ± 12.885

0.259

Preoperative anxiety

0.958

 None

751 (60.4%)

32 (60.4%)

719 (60.4%)

 Counseling

219 (17.6%)

11 (20.8%)

262 (22.0%)

 Drugs

273 (22.0%)

10 (18.9%)

209 (17.6%)

Operation time (min)

186.238 ± 21.486

189.094 ± 52.711

186.111 ± 18.982

0.683

Operation blood loss (ml)

171.440 ± 52.732

181.132 ± 89.911

171.008 ± 50.915

0.388

Approach

0.183

 Opening

832 (66.9%)

31 (58.5%)

801 (67.3%)

 Laparoscopy

411 (33.1%)

22 (41.5%)

389 (32.7%)

Reconstruction

0.079

 Roux-en-Y

442 (35.6%)

25 (47.2%)

417 (35.0%)

 Uncut Roux-en-Y

801 (64.4%)

28 (52.8%)

773 (65.0%)

Volume of residual stomach

0.018

 LGPA preserved

560 (45.1%)

14 (26.4%)

546 (45.9%)

 LGPA ligation

322 (25.9%)

17 (32.1%)

305 (25.6%)

 First branch of SGA ligation

361 (29.0%)

22 (41.5%)

339 (28.5%)

Position of anastomosis

< 0.001

 Greater curvature parallel

142 (11.4%)

10 (18.9%)

132 (11.1%)

 Greater curvature perpendicular

222 (17.9%)

21 (39.6%)

201 (16.9%)

 Middle position of gastric posterior wall

879 (70.7%)

22 (41.5%)

857 (72.0%)

Stapler type

< 0.001

 Circle stapler

879 (70.7%)

24 (45.3%)

855 (50.5%)

 Linear stapler

364 (29.3%)

29 (54.7%)

335 (49.5%)

Position of afferent loop

0.670

 Greater curvature

731 (58.8%)

33 (62.3%)

698 (58.7%)

 Lesser curvature

512 (41.2%)

20 (37.7%)

492 (41.3%)