Table 3

Comparison of hormone and growth factor levels among 6–8 year old Boston girls after 1 week milk consumption versus 1 week macronutrient substitute for milk (n = 28).

Boston

Mean

50^th percentile

75^th percentile

Growth Hormone (ng/ml)

After substitute

0.89 ± 0.96

0.41

1.52

After milk

1.25 ± 1.67

0.21

1.62

p-value

NA*

0.63

0.93

IGF-I (ng/ml)

After substitute

257.26 ± 69.12

250.36

294.71

After milk

270.60 ± 89.46

250.20

308.77

p-value

0.35

0.99

0.68

IGF-I/IGFBP-3

After substitute

0.057 ± 0.01

0.057

0.064

After milk

0.059 ± 0.02

0.056

0.068

p-value

0.28

0.72

0.28

For means, p-values are from paired t-tests. For 50^th and 75^th percentiles, p-values are from unpaired quantile regression.

*T-test comparing mean GH is not appropriate, due to non-Normal GH distribution

Rich-Edwards et al. Nutrition Journal 2007 6:28   doi:10.1186/1475-2891-6-28