. 2016 Mar 29;13(3):e1001979. doi: 10.1371/journal.pmed.1001979

Table 4. Precision and accuracy of the CKD-EPI and Schwartz equations according to age and mGFR in children and adolescents.

mGFR Category and Performance Index	All Participants <18 y		Children (2–12 y)		Adolescents (13–17 y)
mGFR Category and Performance Index	CKD-EPI	Schwartz	CKD-EPI	Schwartz	CKD-EPI	Schwartz
All mGFR categories
IQR (95% CI)	0.33 (0.31; 0.34)	0.23 (0.21; 0.24)	0.39 (0.37; 0.42)	0.22 (0.20; 0.23)	0.35 (0.31; 0.41)	0.21 (0.22; 0.27)
P10 (95% CI)	8.4 (6.0; 10.0)	46.7 (44.0; 49.6)	2.8 (1.6; 4.0)	49.1 (45.5; 52.6)	18.1 (14.3; 21.8)	42.7 (38.1; 47.6)
P30 (95% CI)	29.4 (26.8; 32.0)	88.6 (86.7; 90.4)	16.8 (14.1; 19.0)	89.3 (87.1; 91.5)	51.4 (46.7; 56.1)	87.2 (84.0; 90.3)
<60 ml/min/1.73 m ²
IQR (95% CI)	1.04 (0.90; 1.14)	0.31 (0.29; 0.45)	0.79 (0.65; 0.99)	0.26 (0.22; 0.37)	0.67 (0.46; 0.93)	0.37 (0.24; 0.61)
P10 (95% CI)	0.8 (0.0; 2.5)	33.6 (25.1; 42.1)	0.0 (0.0; 0.0)	31.1 (19.1; 42.0)	1.6 (0.0; 5.0)	36.1 (24.0; 48.1)
P30 (95% CI)	10.9 (5.3; 16.5)	67.5 (58.7; 75.6)	0.0 (0.0; 0.0)	62.1 (49.5; 74.6)	21.3 (11.0; 35.5)	72.1 (61.0; 83.9)
60–89 ml/min/1.73 m ²
IQR (95% CI)	0.42 (0.36; 0.46)	0.23 (0.20; 0.26)	0.35 (0.30; 0.40)	0.21 (0.18; 0.24)	0.41 (0.30; 0.51)	0.21 (0.17; 0.32)
P10 (95% CI)	3.0 (1.0; 5.1)	49.5 (45.5; 52.5)	0.0 (0.0; 0.0)	46.4 (38.8; 54.4)	7.1 (4.0; 10.2)	45.1 (36.6; 54.3)
P30 (95% CI)	10.3 (6.8; 13.9)	89.0 (85.5; 92.7)	0.0 (0.0; 0.0)	90.4 (85.3; 94.8)	23.9 (18.7; 29.1)	87.6 (81.5; 93.7)
≥90 ml/min/1.73 m ²
IQR (95% CI)	0.32 (0.31; 0.34)	0.21 (0.19; 0.23)	0.28 (0.26; 0.31)	0.18 (0.17; 0.21)	0.24 (0.21; 0.27)	0.20 (0.17; 0.24)
P10 (95% CI)	11.2 (9.0; 13.5)	49.5 (45.5; 52.5)	3.8 (2.2; 5.5)	51.7 (47.5; 56.0)	27.0 (21.5; 32.4)	43.4 (37.3; 49.4)
P30 (95% CI)	38.5 (35.5; 41.8)	91.2 (89.6; 93.5)	23.3 (19.7; 26.8)	92.0 (89.8; 94.3)	70.7 (65.1; 72.3)	90.6 (87.0; 94.2)

IQR: IQR of the ratio of eGFR to mGFR; P10 and P30: within 10% and 30% limits above and below the mGFR.