Table 1 Descriptive and inferential statistics for differences between boys and girls
Boys (B) | Girls (G) | All | B vs. G | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
n | M | SD | n | M | SD | n | M | SD | t | p | d a | |
Testosterone at mini-puberty (pg/ml) | 39 | 79.68 | 22.56 | 47 | 67.98 | 20.19 | 86 | 73.29 | 21.97 | 2.54 | .013 | .55 |
Q-CHAT scores | 40 | 28.83 | 6.89 | 47 | 25.74 | 7.23 | 87 | 27.62 | 7.24 | 2.06 | .042 | .43 |
Birth weight (kg) | 40 | 3.39 | .53 | 47 | 3.42 | .43 | 87 | 3.41 | .48 | −.27 | .790 | −.06 |
Child’s age at saliva sampling (weeks) | 40 | 7.62 | 1.67 | 47 | 8.00 | 2.19 | 87 | 7.82 | 1.96 | −.90 | .369 | −.19 |
Child’s age at Q-CHAT assessment (months) | 40 | 22.47 | 3.55 | 47 | 22.31 | 3.38 | 87 | 22.39 | 3.44 | .22 | .830 | .05 |
Maternal age (years) | 40 | 34.52 | 3.23 | 46 | 33.95 | 4.45 | 86 | 34.21 | 3.92 | .67 | .504 | .14 |
Paternal age (years) | 39 | 35.96 | 3.65 | 46 | 36.51 | 5.92 | 85 | 36.26 | 4.99 | −.50 | .620 | −.11 |
Maternal education | 40 | 4.65 | .48 | 47 | 4.64 | .53 | 87 | 4.64 | .51 | .11 | .915 | .02 |
Paternal education | 40 | 4.50 | .64 | 47 | 4.68 | .52 | 87 | 4.60 | .58 | −1.46 | .148 | −.31 |
Number of siblings | 40 | .58 | .87 | 47 | .60 | .74 | 87 | .59 | .80 | −.12 | .905 | −.02 |