Table 2.
Patient and procedure risk factors for infection
| Risk factor | Univariate hazard ratio (95% CI) | p value | Adjusted hazard ratio (95% CI) | p value |
|---|---|---|---|---|
| Age, per 1-year increments | 0.97 (0.94–0.97) | 0.006* | 0.95 (0.92–0.98) | < 0.001 |
| Males versus females | 2.56 (1.38–4.75) | 0.003* | 2.59 (1.27–5.31) | 0.009 |
| ASA class ≥ III versus I and II | 0.56 (0.28–1.11) | 0.094* | 0.71 (0.34–1.45) | 0.344 |
| Procedure | 0.003* | < 0.001 | ||
| Hemiarthroplasty versus total shoulder arthroplasty | 1.26 (0.64–2.49) | 0.508 | 0.63 (0.24–1.63) | 0.338 |
| Reverse total shoulder arthroplasty versus total shoulder arthroplasty | 3.54 (1.67–7.50) | 0.001 | 6.11 (2.65–14.07) | < 0.001 |
| Traumatic versus elective procedure | 1.62 (0.83–3.12) | 0.156 | 2.98 (1.15–7.74) | 0.025 |
| BMI (kg/m2) | 0.095* | 0.000 | ||
| 30–34 versus < 30 | 1.54 (0.81–2.92) | 0.187 | 1.88 (0.95–3.73) | 0.081 |
| ≥ 35 versus < 30 | 0.48 (0.17–1.37) | 0.168 | 0.63 (0.21–1.91) | 0.416 |
| Race | ||||
| Nonwhite versus white | 0.59 (0.23–1.49) | 0.261 | – | – |
| Diabetes | ||||
| (Yes versus no) | 1.11 (0.58–2.12) | 0.747 | – | – |
*Included in multivariable analysis (p < 0.20); ASA = American Society of Anesthesiologists.