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) | 4.8a | 0.7 | 5.3ab | 0.7 | 5.5b | 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) | 6.8a | 0.9 | 7.5ab | 1.0 | 7.9b | 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 | 0.51a | 0.03 | 0.52ab | 0.05 | 0.46b | 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 | 0.71a | 0.04 | 0.66b | 0.03 | 0.68ab | 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 | 76a | 14 | 95b | 14 | 67a | 8 | P < 0.01 |
Gastrocnemius muscle | 112a | 8 | 120b | 11 | 120b | 8 | P < 0.01 |
Skin | 12841 | 1134 | 13455 | 1448 | 13644 | 1432 | NS |