Table 2.
Treatment groupsb) | Low-RS-S | Hi-RS-S | Low-RS-WG | Hi-RS-WG | Pooled SEM |
---|---|---|---|---|---|
Empty cecum weights (g) | 0.461 | 0.872 | 0.553 | 1.144 | 0.04 |
Cecal contents pH | 7.921 | 6.722 | 7.362 | 6.283 | 0.15 |
Acetate (millimoles/cecum) | 0.0721 | 0.2592 | 0.1622 | 0.5623 | 0.050 |
Propionate (millimoles/cecum) | 0.0121 | 0.0502 | 0.0262 | 0.1153 | 0.011 |
Butyrate (millimoles/cecum) | 0.0201 | 0.1432 | 0.0502 | 0.3133 | 0.033 |
Glucagon-like peptide 1, pM | 0.0511 | 0.1492 | 0.0811 | 0.1742 | 0.028 |
Energy intake (kcal) | 5550.41 | 6302.42 | 5898.93 | 6352.32 | 112.3 |
Emboweled body weight (EBW, g)c) | 450.01 | 464.11,2 | 484.32 | 480.82 | 9.5 |
Abdominal fat (AF, %)AF/EBW × 100 | 7.1 | 7.0 | 7.2 | 7.0 | 0.1 |
HOMA-IRd) | 31.31 | 17.22 | 30.11 | 26.81,2 | 3.2 |
Significant differences for treatment group dependent variable values with p < 0.05 are indicated by different superscript numbers. Note that the p-value for the difference between the cecal contents pH for Hi-RS-S and Low-RS-WG approached significance at p = 0.052.
Acronym letters for the diets include: Low-RS-S, isolated starch control diet; Hi-RS-S, high isolated RS diet that contains high-amylose maize RS type 2; Low-RS-WG, low-RS whole-grain control diet that contains whole-grain dent corn flour; Hi-RS-WG, high-RS whole-grain flour diet that contains high-amylose whole-grain flour.
Emboweled body weight was calculated as disemboweled body weight (final body weight minus weight of full GI tract) plus the weight of the empty GI tract.
The homeostatic model of assessment-insulin resistance (HOMA-IR), which equals fasting plasma glucose (mg/dL) multiplied by fasting plasma insulin (µU/mL) and then divided by 2430.