Table 1.

Amounts of collagen peptides in 24 h urine and correlation coefficients between the peptides.

	nmol/24 h Urine		Spearman’s Correlation Coefficient
	Median	(IQR)	Pro-Hyp	Ala-Hyp	Gly-Pro-Hyp	Phe-Hyp	Leu-Hyp	Hyp-Gly	Ile-Hyp	Pro-Hyp-Gly	Ala-Hyp-Gly	Ser-Hyp-Gly
Pro-Hyp	18,400	(6522–32,310)	1.00	0.78	0.83	0.89	0.82	0.42	0.86	0.83	0.90	0.88
Ala-Hyp	1136	(789–1830)		1.00	0.83	0.89	0.94	0.45	0.93	0.78	0.87	0.82
Gly-Pro-Hyp	856	(599–1219)			1.00	0.87	0.83	0.28	0.80	0.68	0.79	0.71
Phe-Hyp	840	(502–1,32)				1.00	0.96	0.43	0.94	0.87	0.91	0.85
Leu-Hyp	594	(391–801)					1.00	0.51	0.96	0.87	0.87	0.81
Hyp-Gly	514	(398–1215)						1.00	0.61	0.61	0.49	0.48
Ile-Hyp	483	(287–647)							1.00	0.88	0.94	0.88
Pro-Hyp-Gly	244	(144–284)								1.00	0.85	0.84
Ala-Hyp-Gly	235	(97–313)									1.00	0.95
Ser-Hyp-Gly	164	(73–312)										1.00

IQR, interquartile range. n = 35; r ≥ 0.34 p < 0.05, r ≥ 0.44 p < 0.01. Bold values indicate a statistically significant difference with a p-value less than 0.05.