Table 2.
Results of Log-Cost Model Examining Predictors of Treatment Cost
| Characteristic | Parameter estimate | Standard error | p |
|---|---|---|---|
| Intercept | 9.19 | 0.05 | <0.0001 |
| Treatment | |||
| Endopyelotomy | 1 | — | — |
| Open pyeloplasty | 0.46 | 0.03 | <0.0001 |
| Minimally invasive pyeloplasty | 0.49 | 0.03 | <0.0001 |
| Age, years | |||
| 18–34 | 1 | — | — |
| 35–44 | 0.02 | 0.04 | 0.58 |
| 45–54 | 0.05 | 0.03 | 0.13 |
| 55–64 | −0.003 | 0.03 | 0.93 |
| Gender | |||
| Female | 1 | — | — |
| Male | 0.07 | 0.02 | 0.003 |
| Comorbidity | |||
| 0 | 1 | — | — |
| 1 or more | 0.13 | 0.03 | 0.0001 |
| Benefit plan type | |||
| HMO | 1 | — | — |
| PPO | 0.18 | 0.04 | <0.0001 |
| Othera | 0.15 | 0.04 | 0.0002 |
| Region of residence | |||
| Northeast | 1 | — | — |
| North Central | −0.03 | 0.04 | 0.42 |
| South | −0.12 | 0.04 | 0.002 |
| West | −0.002 | 0.04 | 0.96 |
| Unknown | −0.12 | 0.10 | 0.24 |
The effect of each predictor was adjusted for all other predictors in the model.
a
Other includes comprehensive, exclusive provider organization, point of service, point of service with capitation, consumer-directed health plan, and missing.