Table 4 Influencing factors to postoperative used rescue analgesia: Single-factor analysis

Tumor location (1), n (%)

Esophagus or stomach ^a

76 (22.75%)

204 (41.89%)

<  0.001 ^b

Transverse colon

5 (1.50%)

7 (1.44%)

0.279

0.522

0.161

1.693

Left colon

5 (1.50%)

20 (4.11%)

0.441

1.490

0.540

4.111

Right colon

28 (8.38%)

39 (8.01%)

0.020 ^b

0.519

0.299

0.901

Sigmoid flexure

35 (10.48%)

29 (5.95%)

<  0.001 ^b

0.309

0.177

0.539

Rectum

177 (52.99%)

167 (34.29%)

<  0.001 ^b

0.352

0.251

0.493

Jejunum or ileum

8 (2.40%)

21 (4.31%)

0.959

0.978

0.416

2.301

Tumor location (2), n (%)

Lower abdominal tumor ^a

240 (71.86%)

235 (48.25%)

Upper abdominal tumor

94 (28.14%)

252 (51.75%)

<  0.001 ^b

2.738

2.034

3.686

Type of surgery (1), n (%)

Laparotomy ^a

260 (70.65%)

469 (83.45%)

<  0.001 ^b

Laparoscopically surgery

104 (28.26%)

82 (14.59%)

<  0.001 ^b

0.437

0.315

0.606

Superficial abdominal wall surgery

3 (0.82%)

9 (1.0%)

0.448

1.663

0.446

6.197

Laparoscopic to open surgery

1 (0.27%)

2 (0.36%)

0.933

1.109

0.100

12.286

Type of surgery (2), n (%)

Laparoscopically surgery ^a

104 (28.57%)

82 (14.88%)

Laparotomy

260 (71.43%)

469 (85.12%)

<  0.001 ^b

2.288

1.650

3.172

94 (23.15%)

179 (31.74%)

<  0.003 ^b

1.543

1.154

2.064

Number of types of intraoperative long-acting analgesics used, n (%)

0 ^a

80 (19.70%)

53 (9.40%)

<  0.001 ^b

1

312 (76.85%)

491 (87.06%)

<  0.001 ^b

2.375

1.633

3.456

2

14 (3.45%)

20 (3.55%)

0.049 ^b

2.156

1.002

4.639