Table 1 Results of univariate analyses

Age (year)

63 (14)

64 (13)

0.191*

Sex (M/F)

100/76

1571/989

0.232

Height (cm)

161 (8)

161 (9)

0.301

Weight (kg)

59 (11)

59 (11)

0.968

BMI (kg m⁻²)

22.7 (3.6)

22.5 (3.4)

0.447

ASA physical status (1–5)

2 (2–2)

2 (2–2)

0.946

Coexisting disease (Y/N)

119/57

1876/686

0.114*

Resident management (Y/N)

103/73

1506/1054

0.937

Intensity of injection pain (0–2)

0 (0–1)

0 (0–0)

0.081*

Radiating pain (Y/N)

8/168

57/2503

0.067*

Duration of anesthesia (min)

376 (217)

324 (154)

0.00002*

Duration of surgery (min)

306 (213)

255 (148)

0.00002

Inhalational anesthesia (Y/N)

157/19

2261/299

0.808

Pneumatic compression (Y/N)

152/24

2254/306

0.475

Emergency (Y/N)

6/170

84/2476

0.828

Transfusion

51/125

495/2065

0.003*

Surgical posture (supine/lateral/lithotomy/other)

93/61/20/2

1413/893/223/31

0.652

Surgical site (abdominal/extremity/thoracic)

120/3/53

1822/5/733

0.0152*

Intraoperative adverse event (Y/N)

2/174

10/2550

0.178*

ICU admission

68/108

880/1680

0.253

Intensity of postoperative pain (0–2)

1 (1–2)

1 (0–1)

0.027*

Postoperative headache (Y/N)

179/2381

21/155

0.023*

Days taken to visit postoperative anesthesia consulting clinic

11 (7)

10 (5)

0.003*