Determining the preference ranking for Oreo, Froot Loops, and Crisco in aged laboratory rats.
Date: June 27, 2007
Researchers: R. Mackechnie, K. Govind, GR Davis
Oreo = 4.7 kcal/g, FL =3.9 kcal/g , Crisco = 9.3 kcal/g
Background:
In previous research several food selections have been used to study the food intake in laboratory rats. There are many reasons to choose different food types such as macronutrient content, mode of eating, etc. Froot Loops (FL), Crisco (CR), and Oreo cookies (OR) are more palatable than rat chow (RC); however, the rank of palatability of these foods is not known. FL are for the most part comprised of carbohydrates and CR is almost all fat. OR have a combination of the two macronutrients with the filling being comprised of primarily fats and the out two cookies mostly carbohydrates. Since these foods have been used in multiple studies it would be useful to know if laboratory rats prefer one selection to another since the results are compared. For instance in developing an animal model for binge eating it will be necessary to compare the results for a study using CR and a study using FL. If there is a difference in both the palatability as well as the macronutrient content it could be difficult to compare the data. Another difference among these foods is their energy densities.
30 min intake FL vs. Oreo vs. Crisco
One Way Analysis of VarianceWednesday, June 27, 2007, 11:06:12 AM
Data source: Data 1 in Notebook 1
Normality Test:Failed(P = <0.001)
Equal Variance Test:Failed(P = 0.021)
Group Name N MissingMeanStd DevSEM
30min fl 22 0 1.641 1.3270.283
30min crisco 22 0 1.664 1.4980.319
30min oreo 22 0 0.364 1.1180.238
Source of Variation DF SS MS F P
Between Groups 2 24.361 12.180 6.9560.002
Residual 63 110.315 1.751
Total 65 134.676
The differences in the mean values among the treatment groups are greater than would be expected by chance; there is a statistically significant difference (P = 0.002).
Power of performed test with alpha = 0.050: 0.876
All Pairwise Multiple Comparison Procedures (Student-Newman-Keuls Method) :
Comparisons for factor:
ComparisonDiff of MeanspqPP<0.050
30min crisco vs. 30min oreo 1.300 3 4.608 0.005Yes
30min crisco vs. 30min fl 0.0227 2 0.0806 0.955No
30min fl vs. 30min oreo 1.277 2 4.527 0.002Yes
60 min intake fl vs oreo vs crisco
One Way Analysis of VarianceWednesday, June 27, 2007, 11:09:27 AM
Data source: Data 1 in Notebook 1
Normality Test:Failed(P = <0.001)
Equal Variance Test:Failed(P = <0.001)
Group Name N MissingMeanStd DevSEM
total fl 22 0 1.668 1.6490.352
total crisco 22 0 2.182 1.7360.370
total oreo 22 0 0.141 0.4360.0930
Source of Variation DF SS MS F P
Between Groups 2 49.586 24.793 12.557<0.001
Residual 63 124.394 1.975
Total 65 173.979
The differences in the mean values among the treatment groups are greater than would be expected by chance; there is a statistically significant difference (P = <0.001).
Power of performed test with alpha = 0.050: 0.996
All Pairwise Multiple Comparison Procedures (Student-Newman-Keuls Method) :
Comparisons for factor:
ComparisonDiff of MeanspqPP<0.050
total crisco vs. total oreo 2.041 3 6.812 <0.001Yes
total crisco vs. total fl 0.514 2 1.715 0.230No
total fl vs. total oreo 1.527 2 5.098 <0.001Yes
Kcal at 60 minutes for FL, Oreos, and Crisco
One Way Analysis of VarianceWednesday, June 27, 2007, 3:49:01 PM
Data source: Data 1 in cafeteria preference test.SNB
Normality Test:Failed(P = <0.001)
Equal Variance Test:Failed(P = <0.001)
Group Name N MissingMeanStd DevSEM
kcal FL 22 0 6.506 6.4321.371
kcal crisco 22 0 20.291 16.1433.442
kcal oreo 22 0 0.662 2.0490.437
Source of Variation DF SS MS F P
Between Groups 2 4469.356 2234.678 21.896<0.001
Residual 63 6429.580 102.057
Total 65 10898.937
The differences in the mean values among the treatment groups are greater than would be expected by chance; there is a statistically significant difference (P = <0.001).
Power of performed test with alpha = 0.050: 1.000
All Pairwise Multiple Comparison Procedures (Student-Newman-Keuls Method) :
Comparisons for factor:
ComparisonDiff of MeanspqPP<0.050
kcal crisco vs. kcal oreo 19.629 3 9.113 <0.001Yes
kcal crisco vs. kcal FL 13.785 2 6.400 <0.001Yes
kcal FL vs. kcal oreo5.8442 2.713 0.060No