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Table 2.

Plasma concentrations and mean differences [mean (SE)] of plasma IGF-I by diet feeding order

AnalytePeriodDiet Feeding Order
P for interaction*
DietControl → Experimental (n = 19)DietExperimental → Control (n = 23)
IGF-I (ng/mL) Control 214.9 (14.5) Experimental 211.3 (8.5)  
 Experimental 215.9 (14.6) Control 193.6 (7.3)  
  Difference§ 1.05 (20.1) Difference§ 18.1 (5.2)  
  P 0.89 P 0.0005 0.07 
AnalytePeriodDiet Feeding Order
P for interaction*
DietControl → Experimental (n = 19)DietExperimental → Control (n = 23)
IGF-I (ng/mL) Control 214.9 (14.5) Experimental 211.3 (8.5)  
 Experimental 215.9 (14.6) Control 193.6 (7.3)  
  Difference§ 1.05 (20.1) Difference§ 18.1 (5.2)  
  P 0.89 P 0.0005 0.07 
*

Interaction between diet and diet feeding order.

Period 1, mean (SE) difference between experimental and control for IGF-I = −3.63 (15.8); Wilcoxon rank sum P = 0.89.

Period 2, mean (SE) difference between experimental and control for IGF-I = 22.5 (14.9); Wilcoxon rank sum P = 0.29.

§

Difference between experimental and control calculated using generalized estimating equations.

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