Table 2.
Risk factors for intraoperative humerus fractures
| Risk factor | OR | 95% CI | p value |
|---|---|---|---|
| Difficult modifier | 3.73 | 1.71−8.12 | < 0.01* |
| History of instability | 2.65 | 1.18−5.93 | 0.02* |
| Female sex | 2.41 | 1.11–5.68 | 0.03* |
| Prior hemiarthroplasty | 2.34 | 1.13–4.84 | 0.03* |
| Inflammatory arthritis | 2.57 | 0.75–8.84 | 0.13 |
| Cemented primary | 1.08 | 0.50–2.35 | 0.84 |
| Age at surgery | 1.02 | 0.52–1.06 | 0.21 |
| Prior proximal humerus fracture | 1.01 | 0.45–2.31 | 0.97 |
| BMI | 0.94 | 0.89–1.01 | 0.06 |
| Prior ORIF | 0.70 | 0.15−3.21 | 0.65 |
| Preoperative humeral lucency | 0.70 | 0.15–3.21 | 0.65 |
| Laborer | 0.53 | 0.03–2.88 | 0.51 |
| Smoker | 0.43 | 0.10–0.94 | 0.28 |
| Revision for infection | 0.40 | 0.09–1.76 | 0.22 |
| Diabetes mellitus | 0.13 | 0.02–1.02 | 0.052 |
* Statistically significant at p < 0.05; OR = odds ratio; ORIF = open reduction and internal fixation.