Table 2.
Independent factors associated with computer navigation TKA utilization.
| Variable | Relative risk | Confidence interval | P value |
|---|---|---|---|
| Age | 1.01 | 1.00-1.01 | .03 |
| Female gender (reference: male) | 0.98 | 0.90-1.07 | .62 |
| Number of comorbidities | 1.01 | 1.00-1.03 | .13 |
| Race (reference: white) | |||
| Black | 0.67 | 0.55-0.83 | <.0001 |
| Hispanic | 0.93 | 0.78-1.11 | .42 |
| Asian or Pacific Islander | 0.59 | 0.39-0.90 | .01 |
| Native American | 1.36 | 0.78-2.37 | .28 |
| Other | 2.24 | 1.85-2.71 | <.0001 |
| Primary payment (reference: Medicare) | |||
| Medicaid | 0.55 | 0.41-0.74 | <.0001 |
| Private | 1.07 | 0.96-1.20 | .22 |
| Self-pay | 1.22 | 0.67-2.24 | .51 |
| Median household income (reference: first quartile) | |||
| 25-50th Percentile | 0.97 | 0.86-1.10 | .66 |
| 50-75th Percentile | 0.90 | 0.80-1.02 | .11 |
| 75-100th Percentile | 0.72 | 0.63-0.82 | <.0001 |
| Hospital location/teaching status (reference: rural) | |||
| Urban, nonteaching | 0.64 | 0.55-0.74 | <.0001 |
| Urban, teaching | 0.65 | 0.57-0.75 | <.0001 |
| Hospital size (reference: small) | |||
| Medium | 0.85 | 0.77-0.95 | <.0001 |
| Large | 0.65 | 0.59-0.72 | <.0001 |
| Region of hospital (reference: Northeast) | |||
| Midwest | 0.65 | 0.56-0.74 | <.0001 |
| South | 0.72 | 0.63-0.81 | <.0001 |
| West | 1.56 | 1.37-1.77 | <.0001 |