Table 2.
Area under the receiver operating characteristics curves (AUC) and 95% confidence interval, Akaike information criterion (AIC), difference in likelihood ratio chi square (with model with covariates only) and p-value, and calibration chi square and p-value for the prediction of diabetic nephropathy
| Model | AUC | AIC | Delta likelihood ratio c2 | Calibration c2 (p-value) |
|---|---|---|---|---|
| SBP (A) | 0.620 (0.562-0.678) | 511.871 | 9.946 | 8.92 (0.35) |
| DBP (B) | 0.618 (0.560-0.677) | 515.376 | 6.442 | 7.86 (0.45) |
| PP (C) | 0.615 (0.558-0.673) | 515.772 | 6.046 | 5.24 (0.73) |
| MAP (D) | 0.622 (0.564-0.680) | 512.564 | 9.254 | 5.44 (0.71) |
| SBP + DBP (E) | 0.621 (0.563-0.679) | 513.749 | 10.069 | 6.32 (0.61) |
| PP + MAP (F) | 0.621 (0.563-0.679) | 513.749 | 10.069 | 6.32 (0.61) |
Models are adjusted for age, sex, use of blood pressure lowering medication and recruitment centre. P value for differences in AUC: A-B (0.91), A-C (0.69), A-D (0.84), A-E (0.78), A-F (0.78) B-C (0.89), B-D (0.67), B-E (0.86), B-F (0.86), C-D (0.72), C-E (0.69), C-F (0.69), D-E (0.88), D-F (0.88), E-F (1); Overall p-value (0.93) for the difference in AUC for all the models above. Systolic blood pressure (SBP), diastolic blood pressure (DBP), pulse pressure (PP) and mean arterial blood pressure (MAP)