. 2011 Jul 25;8:52. doi: 10.1186/1743-7075-8-52

Table 2.

Effect of adaptation diet (15 days) on growth, dietary consumption, body and tissue composition in rats (n = 48)

	OPI		MPI		RPI

	Mean	SD	Mean	SD	Mean	SD	Stat effect^a
Weight
Initial weight (g)	210	9	210	6	209	8	NS
Final weight (g)	282	14	290	14	292	9	P = 0.07
Weight gain (g.d^-1)	4.8^a	0.7	5.3^ab	0.7	5.5^b	0.5	P < 0.02

Consumption
Food intake (kcal.d^-1)	74.5	5.3	74.2	4.2	74.8	6.0	NS
Protein intake (g.d^-1)	3.7	0.3	3.7	0.2	3.7	0.3	NS
Food efficiency (g.kcal^-1×100)	6.8^a	0.9	7.5^ab	1.0	7.9^b	0.9	P < 0.005

Body composition^b
Total body water (g)	177	11	188	10	181	11	NS
Fat free mass (g)	243	15	257	13	248	15	NS
Fat mass (g)	42	19	29	8	39	22	NS
Fat mass (%)	14.5	6.2	10.2	2.8	13.6	7.5	NS

Tissue mass (g/100 g BW)
Stomach	0.51^a	0.03	0.52^ab	0.05	0.46^b	0.03	P < 0.0005
Intestinal mucosa	2.69	0.28	2.68	0.31	2.65	0.23	NS
Cecum	0.24	0.04	0.28	0.04	0.23	0.05	P = 0.08
Colon	0.36	0.05	0.35	0.04	0.35	0.04	NS
Liver	3.36	0.24	3.31	0.20	3.31	0.19	NS
Kidney	0.71^a	0.04	0.66^b	0.03	0.68^ab	0.06	P < 0.05
Gastrocnemius muscle	0.183	0.008	0.180	0.008	0.179	0.008	NS
Total skeletal muscle ^c	51.6	1.9	52.4	3.1	50.3	1.9	P = 0.08

Tissue protein content (mg)
Stomach	234	22	239	42	214	41	NS
Intestinal mucosa	867	92	841	100	812	98	NS
Kidney	366	32	360	35	357	37	NS
Liver	1957	163	2026	168	1996	156	NS
Colon	107	32	100	36	103	38	NS
Cecum	76^a	14	95^b	14	67^a	8	P < 0.01
Gastrocnemius muscle	112^a	8	120^b	11	120^b	8	P < 0.01
Skin	12841	1134	13455	1448	13644	1432	NS

NS: not significant, BW: body weight. ^aOne way ANOVA; ^bDetermined by deuterated water method; ^cEstimated from fat-free mass (see Materials and methods). Means in a row with different letters are significantly different (P < 0.05, Tukey post-hoc test).