Normality data of eGFR and validity of commonly used screening tests for CKD in an area with endemic CKD of unknown etiology; need for age and sex based precise cutoff values

Table 1 Age and sex disaggregated distribution of eGFR (CKD-EPI equation) values among 7768 apparently healthy CKD screening participants in Anuradhapura district

Age (years)	Sex		Mean	95.0% CL for Mean		Standard Deviation	Prevalence of eGFR<< 60 mL/min/1.73 m² n %
< 30	F	883	115.7	114.56	116.84	17.29	7	0.80
< 30	M	291	112.79	110.52	115.06	19.66	4	1.40
30–39	F	1349	102.32	101.42	103.22	16.9	20	1.50
30–39	M	447	99.43	97.76	101.11	18.04	15	3.40
40–49	F	1288	91.22	90.2	92.24	18.61	69	5.40
40–49	M	541	89.57	87.82	91.32	20.73	49	9.10
50–59	F	1236	81.13	80.03	82.22	19.67	167	13.50
50–59	M	505	76.18	74.13	78.23	23.39	103	20.40
60–69	F	597	73.57	72	75.14	19.48	133	22.30
60–69	M	348	65.73	63.25	68.2	23.48	120	34.50
> = 70	F	169	61.88	58.6	65.16	21.6	68	40.20
> = 70	M	114	55.21	51.55	58.87	19.7	66	72.8

ISSN: 1471-2369