Table 4 Simulation results in a domain with ICC = 15%, Pearson correlation X1 and random effect 0 .0
From: Prediction models for clustered data: comparison of a random intercept and standard regression model
Apparent performance | Test performance | ||||
|---|---|---|---|---|---|
Standard model | Marginal risk calculation | Conditional risk calculation | Standard model | Marginal risk calculation | |
Harrell’s C-index † | 0.77 (0.735; 0.802) | 0.77 (0.734; 0.801) | 0.85 (0.818; 0.873) | 0.77 (0.762; 0.769) | 0.77 (0.763; 0.769) |
C-index within clusters ‡ | 0.80 (0.085) | 0.80 (0.086) | 0.80 (0.086) | 0.80 (0.037) | 0.80 (0.037) |
Calibration intercept* | 0.00 | 0.19 | 0.00 | -0.00 | 0.20 |
Calibration intercept* within clusters ‡ | -0.18 (0.941) | -0.00 (1.005) | 0.00 (0.000) | -0.19 (0.967) | 0.01 (1.024) |
Calibration slope | 1.00 | 0.85 | 1.07 | 0.97 | 0.83 |
Calibration slope within clusters ‡ | 1.18 (0.096) | 1.00 (0.082) | 1.07 (0.000) | 1.15 (0.011) | 0.99 (0.008) |