Table 3.

Performance of the Non‐invasive Diabetes Score and American Diabetes Association Diabetes Risk Test in the Shaanxi cohort

Risk score	Optimal cut‐off/maximum points	No. risk factors	AUROC (95% CI)	Sensitivity (%)	Specificity (%)	NPV (%)	PPV (%)	NNS	Calibration statistic†
ADA Diabetes Risk Test	5/10	7 (Age, sex, GDM, FhxDM, HT, physical active, BMI)	0.697 (0.660–0.734)	53.8	73.1	95.3	13.5	11.4	0.047
NDS	28/50	3 (HT, BMI, age)	0.720 (0.685–0.756)	60.8	69.7	95.8	13.5	10.4	0.230

^†Hosmer–Lemeshow goodness of fit test, P < 0.05 suggests that the model does not fit the data. AUROC, area under the curve of the receiver operating characteristic; BMI, body mass index; CI, confidence interval; FhxDM, family history of diabetes; HT, hypertension; NDS, Non‐invasive Diabetes Score; NNS, number needed to screen; NPV, negative predictive value; PPV, positive predictive value.