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Table 3 Multiple explanatory variable logistic regression models

From: Risk factors for rescue analgesic use on the first postoperative day after upper limb surgery performed under single-injection brachial plexus block: a retrospective study of 930 cases

 

n

OR

95% CI

 

Patient background

 Female (vs. Male)

 

1.44

0.94–2.21

P = 0.10

Duration

 Surgical duration (per 30 min increase)

 

1.40

1.13–1.73

P < 0.05

Surgical site

 Hand

429

1.00

Ref

 Wrist

377

1.61

0.95–2.71

P = 0.08

 Forearm

30

0.63

0.14–2.91

P = 0.55

 Elbow

91

1.58

0.77–3.26

P = 0.21

 Upper arm

3

n.c

Narrow classification

 Osteotomy

26

6.07

2.30–16.1

P < 0.05

 Ligament repair and reconstruction

28

6.99

2.79–17.5

P < 0.05

 Osteosynthesis

248

5.18

2.97–9.01

P < 0.05

 Treatment for amputated digit

42

5.94

2.43–14.5

P < 0.05

 Arthrodesis

20

2.80

0.83–9.40

P = 0.10

 Arthroplasty and mobilization

6

1.61

0.17–15.5

P = 0.68

 Other bone surgery

31

2.77

0.95–8.04

P = 0.06

 Arthroscopic surgery

15

1.02

0.12–8.44

P = 0.99

 Soft tissue surgery

350

1.00

Ref

 Removal of implants to fix bone or joint

164

0.69

0.28–1.73

P = 0.43

  1. Ref reference, OR odds ratio, CI confidence interval