Table 2 Single explanatory variable logistic regression models
n | OR | 95% CI | ||
|---|---|---|---|---|
Patient background | ||||
Female (vs. male) | 1.82 | 1.28–2.59 | P < 0.05 | |
Age (per 10 years old increase) | 1.02 | 0.92–1.13 | P = 0.77 | |
Additional local anesthetic use during surgery (vs. disuse) | 1.68 | 0.88–2.96 | P = 0.12 | |
Duration | ||||
Surgical duration (per 30 min increase) | 1.56 | 1.32–1.85 | P < 0.05 | |
Tourniquet duration (per 30 min increase) | 1.89 | 1.56–2.29 | P < 0.05 | |
Surgical site | ||||
Hand | 429 | 1.00 | Ref | – |
Wrist | 377 | 2.28 | 1.55–3.35 | P < 0.05 |
Forearm | 30 | 0.57 | 0.13–2.46 | P = 0.45 |
Elbow | 91 | 1.44 | 0.76–2.75 | P = 0.26 |
Upper arm | 3 | n.c | – | – |
Broad classification | ||||
Bone surgery | 580 | 4.14 | 2.57–6.65 | P < 0.05 |
Soft tissue surgery | 350 | 1.00 | Ref | – |
Narrow classification | ||||
Osteotomy | 26 | 9.32 | 3.79–22.9 | P < 0.05 |
Ligament repair and reconstruction | 28 | 8.28 | 3.42–20.1 | P < 0.05 |
Osteosynthesis | 248 | 6.84 | 4.12–11.4 | P < 0.05 |
Treatment for amputated digit | 42 | 4.07 | 1.73–9.55 | P < 0.05 |
Arthrodesis | 20 | 3.73 | 1.15–12.1 | P < 0.05 |
Arthroplasty | 6 | 2.98 | 0.33–26.6 | P = 0.33 |
Other bone surgery | 31 | 2.87 | 1.00–8.19 | P < 0.05 |
Arthroscopic surgery | 15 | 1.07 | 0.13–8.48 | P = 0.95 |
Soft tissue surgery | 350 | 1.00 | Ref | – |
Removal of implants to fix bone or joint | 164 | 0.77 | 0.33–1.76 | P = 0.53 |