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)1Control214.9 (14.5)Experimental211.3 (8.5)
2Experimental215.9 (14.6)Control193.6 (7.3)
Difference§1.05 (20.1)Difference§18.1 (5.2)
P0.89P0.00050.07
  • * 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.