. 2018 Oct 25;13(10):e0205913. doi: 10.1371/journal.pone.0205913

Table 7. Effect of dietary xylose concentration and collection period on urine xylose and metabolite excretion.

Collection period, d	5–7				12–14				19–21
Dietary treatment, % xylose inclusion	0	2	4	8	0	2	4	8	0	2	4	8	Pooled SEM	T×C¹ P-value
Urinary excretion, g/d
Xylose^*^‡^†	0.51^g	7.04^f	21.59^d	50.06^a	0.49^g	6.01^f	16.25^e	31.53^c	0.83^g	5.73^f	16.06^e	38.58^b	1.28	< 0.0001
Threitol^*^‡^†	0.12^f	2.73^e	6.53^d	15.96^a	0.08^f	2.36^e	5.61^d	10.95^c	0.27^f	2.46^e	6.01^d	13.46^b	0.45	0.0008
Xylitol^*^‡^†	0.01^f	0.07^e	0.16^c ^d	0.27^b	0.01^f	0.06^e ^f	0.14^d	0.23^b	0.04^e ^f	0.05^e ^f	0.21^b ^c	0.41^a	0.02	0.0021
Xylulose^*^‡	0.02^e	0.08^d	0.12^c	0.20^a	0.02^e	0.08^d	0.13^c	0.17^b	0.02^e	0.07^d	0.13^c	0.21^a	0.007	0.0021
Xylonic acid^‡^†	0.000^c ^d	0.001^c ^d	0.009^c ^d	0.059^a	0.000^d	0.001^d ^e	0.009^c	0.033^b	0.000^d	0.001^d	0.008^c ^e	0.035^b	0.003	< 0.0001

Pigs (n = 12/treatment) were housed individually in metabolism crates and fed diets containing either 0, 2, 4, or 8% D-xylose at 4% of BW. Urine was collected during 3 different periods representing increasing adaptation time to treatment diets.

^a-gWithin a row, means without a common superscript differ (P ≤ 0.05)

¹Dietary treatment × collection period interaction (T×C)

*Treatment is significant at P < 0.01

^‡Treatment linear contrast is significant at P < 0.01

^†Collection period is significant at P < 0.01