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Table 5 Summary statistics for selected thresholds of Recalibrated Pooled KFRE SEA equation for 2-year risk of end-stage kidney disease

From: Validation of the kidney failure risk equation for end-stage kidney disease in Southeast Asia

Threshold

Recalibrated Pooled KFRE SEA equationa AUC (95% CI): 0.96 (0.95–0.97)

CKD-EPI eGFR mL/min/1.73m2 AUC (95% CI): 0.93 (0.92–0.95)

> 9%

> 20%

> 40%

> 45%

< 18.8

< 20

Cumulative n of patients

2683 (15.4%)

1240 (7.1%)

531 (3.0%)

430 (2.5%)

430 (2.5%)

546 (3.1%)

N of patients with CKD needed for evaluation by nephrologists to find one ESKD case

8.8 (7.9–9.7)

4.6 (4.2–5.2)

2.7 (2.4–3.1)

2.4 (2.2–2.7)

2.8 (2.4–3.1)

3.2 (2.8–3.6)

Risk of ESKD

11.4% (10.3–12.7%)

21.6% (19.4–24.0%)

36.7% (32.7–40.9%)

41.6% (37.1–46.3%)

36.3% (31.9–40.9%)

31.3% (27.6–35.3%)

Sensitivity (95% CI)

0.93 (0.92–0.94)

0.81 (0.79–0.83)

0.59 (0.54–0.63)

0.54 (0.49–0.59)

0.47 (0.43–0.51)

0.52 (0.48–0.56)

Specificity (95% CI)

0.86 (0.85–0.87)

0.94 (0.93–0.95)

0.98 (0.97–0.99)

0.99 (0.98–1.00)

0.98 (0.97–0.99)

0.98 (0.97–0.99)

PPV (95% CI)

0.07 (0.06–0.08)

0.20 (0.19–0.21)

0.38 (0.37–0.39)

0.42 (0.37–0.47)

0.36 (0.32–0.44)

0.31 (0.27–0.35)

NPV (95% CI)

0.999 (0.990–1.008)

0.997 (0.987–1.007)

0.992 (0.985–0.999)

0.992 (0.982–1.002)

0.989 (0.979–0.999)

0.991 (0.989–1.001)

LR+ (95% CI)

6.68 (6.25–7.14)

14.3 (12.5–16.7)

30.1 (27.0–37.8)

36.8 (25.0–50.0)

23.5 (16.0–30.3)

26.0 (20.0–33.3)

LR- (95% CI)

0.08 (0.07–0.09)

0.20 (0.16–0.20)

0.41 (0.36–0.46)

0.47 (0.42–0.52)

0.54 (0.44–0.65)

0.49 (0.45–0.53)

  1. aThe Recalibrated Pooled KFRE SEA equation for 2-year ESKD risk was calculated as: 1–0.8976 ^ exp. (− 0.2245 × (age/10–7.036) + 0.3212 × (male - 0.5642) - 0.4553 × (eGFR/5–7.222) + 0.4469 × (lnACR - 5.137)). The statistical threshold identified by Youden Index was 9%
  2. Abbreviation: ACR albumin-to-creatinine ratio, AUC area under the receiver operating characteristic curve, CI confidence interval, CKD-EPI Chronic Kidney Disease Epidemiology Collaboration, eGFR estimated glomerular filtration rate, ESKD end-stage kidney disease, KFRE Kidney Failure Risk Equation, LR+ positive likelihood ratio, LR- negative likelihood ratio, NPV negative predictive value, PPV positive predictive value, SEA Southeast Asia