Table 2.
Comparison of cost data and model validation.
| Total costs, $ | Item | Cullen 20157 | Model cohort* | Model prediction† | Prediction versus cohort (p value) |
| All | n (%) | 926 (100%) | 719 (100%) | 719 (100%) | |
| Mean cost (95% CI) | 5272 (4835 to 5708) | 5303 (4796 to 5810) | 5437 (4897 to 5977) | 0.72 | |
| Median cost (25th to 75th percentile) | 2433 (1458 to 6778) | 2497 (1449 to 6663) | 2169 (1747 to 6384) | ||
| Low risk | n (%) | 9 (1.0%) | 9 (1.3%) | 9 (1.3%) | |
| Mean cost (95% CI) | 2040 (1306 to 2774) | 2040 (1125 to 2955) | 2010 (1559 to 2460) | 0.95 | |
| Median cost (25th to 75th percentile) | 1530 (1298 to 3050) | 1530 (1080 to 3359) | 1907 (1569 to 2438) | ||
| Intermediate risk | n (%) | 580 (62.6%) | 468 (65.1%) | 468 (65.1%) | |
| Mean cost (95% CI) | 3304 (2963 to 3644) | 3413 (3050 to 3775) | 3755 (3288 to 4223) | 0.26 | |
| Median cost (25th to 75th percentile) | 1849 (1376 to 3570) | 1925 (1389 to 3628) | 1946 (1668 to 3270) | ||
| High risk | n (%) | 329 (35.5%) | 242 (33.7%) | 242 (33.7%) | |
| Mean cost (95% CI) | 8919 (7971 to 9867) | 9081 (7878 to 10 284) | 8816 (7593 to 10 040) | 0.76 | |
| Median cost (25th to 75th percentile) | 6452 (2650 to 11 829) | 6405 (2752 to 11 309) | 5566 (2355 to 11 130) |
All costs referred to inflated costs in A$.
*Excluded individuals not meeting the minimum required dataset for the model
†Excluded individuals with cost outliers, missing and inconsistent data.