Urinary albumin excretion in healthy adults: a cross sectional study of 24-hour versus timed overnight samples and impact of GFR and other personal characteristics

Table 3 Spearman correlation coefficients between 24 h AER, proxies and determinants

	24 h AER	24 h UAC	24 h ACR	24 h ASG	ON AER	ON UAC	ON ACR	ON ASG
24 h AER	1.00	0.77	0.77	0.71	0.61	0.40^a	0.42^b	0.40
		<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	130	130	130	130	123	123	123	123
24 h UAC	0.77	1.00	0.63	0.69	0.57	0.60	0.42	0.48
	<0.001		<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
	130	130	130	130	123	123	123	123
24 h ACR	0.77	0.63	1.00	0.75	0.44	0.31	0.67	0.41
	<0.001	<0.001		<0.001	<0.001	.0005	<0.001	<0.001
	130	130	130	130	123	123	123	123
24 h ASG	0.71	0.69	0.75	1.00	0.50	0.40	0.54	0.59
	<0.001	<0.001	<0.001		<0.001	0.005	<0.001	<0.001
	130	130	130	130	123	123	123	123
GFR	0.24	0.21	0.18	0.08	0.05	0.07	0.04	0.06
	0.006	0.02	0.04	0.35	0.58	0.39	0.67	0.49
	130	130	130	130	144	144	144	144
Sex	-0.12	-0.17	0.33	0.07	-0.28	-0.09	0.21	0.08
	0.16	0.06	<0.001	0.40	0.007	0.26	0.01	0.92
	130	130	130	130	145	145	145	145
Body mass	0.17	0.21	-0.22	0.03	0.30	0.11	-0.14	0.09
Body mass	0.04	0.02	0.01	0.79	<0.001	0.21	0.05	0.34
	128	128	128	128	142	142	142	142
Smoking	-0.04	-0.09	0.01	-0.15	-0.03	-0.08	0.05	-0.02
	0.61	0.33	0.88	0.09	0.72	0.34	0.52	0.83
	129	129	129	129	144	144	144	144
Age	-0.08	0.06	0.06	-0.02	0.13	0.09	0.23	0.09
	0.38	0.50	0.53	0.83	0.12	0.30	0.006	0.27
	130	130	130	130	145	145	145	145
UF	0.06^c	-0.51^c	-0.006^c	-0.11^c	-0.03^d	-0.70^d	-0.18^d	-0.41^d
	0.47	<0.001	0.94	0.21	0.68	<0.001	0.04	<0.001
	130	130	130	130	145	145	145	145
UCC	0.1^e	0.54^e	-0.24^e	0.05^e	0.24^f	0.71^f	-0.06^f	0.35^f
	0.10	<0.001	0.005	0.56	0.04	<0.001	0.94	<0.001
	130	130	130	130	145	145	145	145

Note: First row in each cell, spearman correlation coefficient; second row, P-value; third row, number of observations.
Abbreviations:ON Overnight, AER Albumin excretion rate, UAC Urinary albumin concentration, ASG Albumin adjusted for specific gravity, ACR Albumin to creatinine ratio, GFR Glomerular filtration rate, UF Urinary flow, UCC Urinary creatinine concentration.
^aMen: r=0.59, P<0.001, N=53; Women: r=0.24, P=0.043, N=70. ^bMen: r=0.64, P<0.001, N=53; Women: r=0.37, P=0.002, N=70. ^c24 h UF. ^dON UF. ^e24 h UCC. ^fON UCC.

ISSN: 1471-2369