Table 2.
Multivariate Logistic Regression for Successful Conversion
| OR (95% CI)a | p-value | |
|---|---|---|
| Age | ||
| 0.99 (0.99, 1.00) | <.001 | |
| Charlson comorbidity score | ||
| 0.99 (0.96, 1.02) | 0.524 | |
| Gender of Patient | ||
| Female | 1.13 (1.05, 1.22) | <.001 |
| Male | reference | . |
| Implant volume | ||
| High (>25) | 1.12 (1.02, 1.22) | 0.014 |
| Medium (9–24) | 1.08 (0.99, 1.18) | 0.080 |
| Low (3–8) | reference | . |
| Year | ||
| 2012 | 0.97 (0.85, 1.10) | 0.610 |
| 2011 | 1.18 (1.04, 1.35) | 0.011 |
| 2010 | 1.13 (0.99, 1.29) | 0.068 |
| 2009 | 1.03 (0.91, 1.16) | 0.684 |
| 2008 | 0.99 (0.87, 1.12) | 0.867 |
| 2007 | reference | . |
| Insurance source | ||
| Medicare | 0.99 (0.86, 1.14) | 0.854 |
| Medicaid | 0.95 (0.86, 1.05) | 0.330 |
| Commercial Insurance | reference | . |
| Employment status | ||
| Other | 1.02 (0.92, 1.12) | 0.709 |
| Retiree/Medicare | 0.94 (0.82, 1.07) | 0.323 |
| Eligible/Disabled | ||
| FT/PT | reference | . |
a
OR, odds ratio; CI, confidence interval