Table 2:
Impact of adding BMI-levels on risk adjustment models (measured by adjusted R2 of cost a and 95% confidence interval b of R2)
| Period | Concurrent | Prospective | ||||
|---|---|---|---|---|---|---|
| Type of Cost | Total Cost |
Pharmacy Cost |
Medical Cost |
Total Cost |
Pharmacy Cost |
Medical Cost |
| Base Model 1: Age, Sex | 1.49 (1.31-1.68) |
0.61 (0.49-0.76) |
1.24 (1.07-1.44) |
1.62 (1.44-1.84) |
0.56 (0.44-0.70) |
1.38 (1.21-1.57) |
| Base Model 1 + Four BMI Levels | 1.97 (1.74-2.20) |
0.96 (0.79-1.13) |
1.60 (1.39-1.83) |
2.43 (2.20-2.74) |
0.90 (0.75-1.07) |
2.07 (1.86-2.32) |
| Base Model 2: Age, Sex, Charlson Index | 6.22 (5.66-6.85) |
2.82 (2.47-3.18) |
5.18 (4.61-5.76) |
4.23 (3.85-4.68) |
2.42 (2.11-2.77) |
3.30 (2.92-3.71) |
| Base Model 2 + Four BMI Levels | 6.47 (5.85-7.07) |
3.02 (2.66-3.40) |
5.36 (4.80-5.98) |
4.79 (4.39-5.24) |
2.64 (2.34-2.96) |
3.79 (3.42-4.21) |
| Base Model 3: Age, Sex, ACG Risk Score | 43.34 (41.96-45.04) |
26.93 (24.83-28.72) |
32.06 (30.45-33.66) |
24.21 (22.86-25.61) |
23.18 (21.88-25.04) |
15.09 (13.73-16.46) |
| Base Model 3 + Four BMI Levels | 43.36 (41.97-45.04) |
26.94 (24.84-28.74) |
32.08 (30.46-33.66) |
24.43 (23.12-25.83) |
23.19 (21.19-25.06) |
15.33 (14.01-16.65) |
(a) cost is truncated at top 0.5%; and, (b) 95% confidence interval is generated using 300 runs of different random splitting