Table 3.
Mean Probability of Membership and Total Costs by Class, Based on an Estimated Finite Mixture Modela
| Class | Probability of Membership | Total Costs |
|---|---|---|
| Mean (95% CI) | Mean (95% CI) | |
| 1 | 0.22 (0.10, 0.42) | $89,980 ($ 70.790, $109,170) |
| 2 | 0.43 (0.32, 0.55) | $150,603 ($120,752, $180.455) |
| 3 | 0.35 (0.21, 0.52) | $277,712 ($236,158, $319,266) |
a
The finite mixture model used a GLM estimator with gamma family and log link, using the 10 predictors shown in Table 2, plus adjustment for whether the patient was attributed to the lower-cost safety-net hospital. The mean probability of membership in each class estimates the proportion of the sample in each class, based on the model.