Table 2.

Comparisons of Urine Albumin to Total Protein Ratio (UAPR), Albumin To Creatinine Ratio (UACR), and Total Protein To Creatinine Ratio (UPCR) of Five Chronic Kidney Disease (CKD) Stages

CKD stage	Number (% of total)	UACR	UPCR	UAPR
1 and 2	172 (28.58)	59 (15–316)	169 (82–621)	0.44 ± 0.25
3	225 (37.38)	89 (20–555)	226 (80–814)	0.47 ± 0.23
4	111 (18.44)	555 (159–1,556)a, b	937 (352–2,335)a, b	0.59 ± 0.17a, c
5	94 (15.61)	647 (265–1,617)a, b	1,166 (685–3,027)a, b	0.49 ± 0.18d

UACR and UPCR are expressed as median with interquartile range.

UAPR is expressed as mean ± standard deviations.

^a P < 0.0001 compared with stages 1 and 2.

^b P < 0.0001 compared with stage 3.

^c P < 0.01 compared with stage 3.

^d P < 0.01 compared with stage 4.