Table 2.

CKD prevalence, model sensitivity, specificity, positive predictive value and negative predictive value estimates for CKD prediction at the time of diagnosis for different life stage groups.

Life stage	Sensitivity (%)	Specificity (%)	Prevalence (%)	PPV (%)	NPV(%)
Adult	62.42	99.69	0.15	22.86	99.94
Mature	82.40	97.99	0.48	16.57	99.91
Senior	94.99	92.88	1.46	16.47	99.92
Geriatric	98.90	69.52	5.21	15.14	99.91

Adult is defined as 1.5 to 6.5 years, mature as 6.5 to 9.75 years and under, senior 9.75 to 13 years, and geriatric as over 13 years. Disease prevalence is estimated from the life stage groups within the study population and model performance determined using the test data set.