TABLE 1.

Statistical analysis of neonatal body weight, body temperature and USV data (from pnd 2 to 12)

	Main effect of strain	Main effect of pnd	Interaction of strain × pnd
Body weight	F(2, 25) = 5.26, p = 0.01	F(2, 4) = 333.58, p < 0.001	F(8, 100) = 0.473, NS
Body temperature	F(2, 25) = 7.33, p < 0.01	F(2, 4) = 107.99, p < 0.001	F(8, 100) = 3.76, p < 0.01
USV rate	F(2, 25) = 52.47, p < 0.01	F(2, 4) = 14.47, p < 0.001	F(8, 100) = 7.76, p < 0.01
USV duration	F(2, 25) = 109.96, p < 0.01	F(2, 4) = 17.35, p < 0.001	F(8, 100) = 8.76, p < 0.01
Peak frequency of USVs	F(2, 25) = 42.47, NS	F(2, 4) = 4.53, NS	F(8, 100) = 12.23, NS
Peak amplitude of USVs	F(2, 25) = 19.86, NS	F(2, 4) = 18.35, NS	F(8, 100) = 8.35, NS

Abbreviation: NS, not statistically significant.