Table 3 Factors associated with postoperative OI: result from bivariable and multivariable binary logistic regression analysis in UOGCSH, 2022

Age (years)^b

32.5 (26–45)

35.5 (27–48)

1.0 (0.99–1.03

1.02 (0.99–1.05)

0.138

Gender^a

 Male

99 (45.62)

118(54.38)

1

1

 Female

67 (33.0)

136 (67.0)

1.70 (1.15–2.53)

2.27 (1.06–4.86)

0.035

BMI^b

21.3(19.72–22.49)

19.4(17.63- 20.8)

0.77 (0.70–0.84)

0.82 (0.71–0.95)

0.006

ASA status^a

 ASA I

127 (51.63)

119 (48.37)

1

1

  ≥ ASA II

39 (22.41)

135 (77.59)

3.69 (2.39–5.70)

3.34(1.34–8.28)

0.009

Hemoglobin^b

14 (12.8–15)

13.5 (12- 14.6)

0.86 (0.77–0.96)

0.91 (0.76–1.10)

0.329

Preop SBP^b

120 (110–130)

120 (110–130)

0.99 (0.98–1.01)

1.04 (0.99–1.08)

0.099

Preop DBP^b

71 (70- 80)

70 (65- 80)

0.97 (0.95–0.99)

0.93 (0.88–0.99)

0.040

Urgency of surgery^a

 Elective

125 (43.71)

161 (56.29)

1

1

 Emergency

41 (30.60)

93 (69.40)

1.76 (1.14–2.72)

0.41 (0.14–1.18)

0.10

Grade of surgery^a

 Minor

43 (68.25)

20 (31.75)

1

1

 Intermediate

60 (38.71)

95 (61.29)

3.40 (1.83–6.34)

1.16 (0.37–3.69)

0.797

 Major

63 (31.19)

139 (68.81)

4.74 (2.58–8.72)

0.28 (0.07–1.11)

0.070

Type of anesthesia^a

 Regional

88 (60.69)

57 (39.31)

1

1

 General

78 (28.36)

197 (71.64)

3.89 (2.55–5.96)

3.26 (1.31–8.12)

0.011

Intraoperative EBL (ml)^b

150 (100- 320)

300 (150–500)

1.003 (1.002–1.005)

1.003 (1.001–1.010)

0.011

Postoperative opioid used^a

 Yes

52 (25.87)

149 (74.13)

3.11 (2.06–4.69)

0.47 (0.20–1.08)

0.075

 No

114 (52.05)

105 (47.95)

1

1

Postop fluid (L)^b

1 (1–2)

2 (1.5- 3)

3.42 (2.51–4.68)

2.09 (1.23–3.55)

0.007

Pain at rest^b

2 (1- 3)

5 (3- 6)

2.64 (2.21–3.15)

1.99 (1.28–3.11)

0.006

Pain during ambulation^b

4 (3- 6)

7 (6–8)

2.65(2.22- 3.16)

1.82 (1.23–2.69)

0.003