A Prediction Model for Prediabetes Risk in Middle-Aged and Elderly Populations: A Prospective Cohort Study in China

Table 3

Performance of models in prediabetes prediction.

Model	AIC	NRI (95% CI)	value	IDI (95% CI)	value
Model 1	1275.641	—	—	—	—
Model 2	1266.549	9.1% (−7.3, 22.8)	0.348	1.4% (−0.7, 5.7)	0.279
Model 3	1257.077	23.5% (−1.2, 31.3)	0.139	3.4% (0, 11.8)	0.04
Model 4	1241.303	30.4% (0, 38.9)	0.04	10.4% (1.7, 21.5)	<0.01

Model 1: incorporating WC; model 2: variables in model 1 and FHD; model 3: variables in model 2 and HbA1c; model 4: variables in model 3 and FPG. AIC: Akaike’s information criterion; CI: confidence interval; FHD: family history of diabetes; FPG: fasting plasma glucose; HbA1c: hemoglobin A1c; HR: hazard ratio; IDI: integrated discrimination improvement; NRI: net reclassification index; WC: waist circumference.