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

Table 8. Effect of dietary xylose concentration and collection period on urine energy concentration and urine sugar concentration and excretion.

Collection period, d	5–7			12–14			19–21
Dietary treatment, % xylose inclusion	2	4	8	2	4	8	2	4	8	Pooled SEM	T×C¹ P-value
Consumed xylose excreted in urine, %
As xylose^*^‡^†	31.09^c ^d	47.17^b	54.87^a	26.53^c ^e	35.50^c	34.56^c	25.32^e	35.08^c	42.29^b	2.34	0.0026
As threitol^*^‡^†	12.05	14.27	17.49	10.40	12.26	12.00	10.88	13.13	14.75	0.71	0.1037
As xylitol, xylulose, or xylonic acid^*^#	0.94^a ^b ^c	0.89^a ^b ^c	0.80^c	0.92^a ^b ^c	0.90^b ^c	0.73^c	0.86^a ^b ^c ^d	1.03^a	0.98^a ^b	0.06	0.0180
Retained xylose^*^‡^†, %	55.92^b ^c	37.67^d	26.84^e	62.15^a ^b	51.35^c	52.77^c	62.94^a	50.77^c	42.01^d	2.85	0.0063

^a-eWithin 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

^#Collection period is significant at P < 0.05

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.