Table 4. Multivariable analysis of factors associated with the use of in-situ release for treatment of cubital tunnel syndrome (2010-2012).
| Patient and surgeon characteristics | Adjusted Odds Ratio ¥ | P value |
|---|---|---|
| Sex | ||
| Female | 1 | - |
| Male | 0.81 (0.70-0.93) | 0.004 |
| Patient location | ||
| Large metro | 1 | - |
| Small metro | 1.18 (0.69-2.01) | 0.55 |
| Micro | 1.06 (0.65-1.74) | 0.80 |
| Other | 1.12 (0.63-2.00) | 0.70 |
| Primary Payer | ||
| Medicare | 1 | - |
| Medicaid | 1.06 (0.90-1.24) | 0.50 |
| Private | 0.65 (0.45-0.93) | 0.02 |
| Other | 0.93 (0.74-1.18) | 0.55 |
| No. of procedure types performed by the surgeon between 2010 and 2012 | ||
| One type | 1 | |
| Two types | 0.13 (0.09-0.19) | <.0001 |
| Three types | 0.07 (0.04-0.14) | <.0001 |
| Surgeon case volume between 2010 and 2012† | ||
| Quartile 1 (1-21 case) | 1 | |
| Quartile 2 (22-61 cases) | 3.62 (2.25-5.82) | <.0001 |
| Quartile 3 (62-195 cases) | 20.83 (9.9-43.83) | <.0001 |
| Quartile 4 (195-572 cases) | 59.81 (16.37-218.56) | <.0001 |
Large metro, 1 million residents or more; small metro, less than 1 million residents; micro, adjacent to large or small metro; Other, not metro or micro
¥
Adjusted odds ratios of undergoing in-situ release were calculated in hierarchical logistic models with a random effect of surgeons who treated the patient cohort, simultaneously adjusting for all patient factors.