Table 1.

Basic Characteristics of Cys‐C, Crea, BUN, and Uric Acid

Age groups (years)	n	Age (years) Mean ± 1SD	Cys‐C (mg/L) Mean ± 1SD (Range)	Crea (μmol/L) Mean ± 1SD (Range)	BUN (mmol/L) Mean ± 1SD (Range)	Uric Mean ± 1SD (Range)
≤18	44	16.1 ± 2.4	0.874 ± 0.121	65.4 ± 14.5	5.1 ± 1.26	317.7 ± 71.3
			(0.62,1.09)	(39.3,99.70)	(2.44,7.04)	(184.0,487.0)
19–29	697	25.4 ± 2.6	0.808 ± 0.119	72.8 ± 14.9	5.00 ± 1.1	310.5 ± 73.1
			(0.52,1.09)	(40.6,121.90)	(2.74,7.92)	(166.0,524.0)
30–39	1,258	35.0 ± 2.8	0.814 ± 0.116	74.6 ± 14.5	5.12 ± 1.10	313 ± 76.7
			(0.51,1.09)	(41,118.6)	(2.80,10.58)	(158.0,609.0)
40–49	1,297	44.0 ± 2.7	0.837 ± 0.121	74.7 ± 14.4	5.26 ± 1.15	311.5 ± 75.7
			(0.51,1.18)	(38.0,130.1)	(2.86,9.53)	(151.0,587.0)
50–59	769	54.3 ± 2.5	0.887 ± 0.108	74.8 ± 14.1	5.5 ± 1.17	312.9 ± 72.3
			(0.54,1.17)	(38.4,127.1)	(3.15,8.56)	(160.0,551.0)
≥60	452	66 ± 5.2	0.939 ± 0.101	75.30 ± 13.6	5.6 ± 1.21	308.0 ± 65.7
			(0.63,1.19)	(46.3,112.5)	(3.16,11.30)	(132.0,485.0))
Total	4,517	42 ± 12.5	0.845 ± 0.122	74.4 ± 14.4	5.2 ± 1.15	311.7 ± 74.0
			(0.51,1.19)	(39.3,130.1)	(2.44,11.30)	(132.0,609.0)