Estimate

95% CI

p

Infantile aggression

Maternal problems in reciprocal social behavior

0.123

[0.032, 0.215]

0.008

Maternal age at birth

0.010

[−0.043, 0.062]

0.719

Paternal age at birth

−0.023

[−0.068, 0.022]

0.319

Maternal years of education

−0.032

[−0.136, 0.071]

0.542

Paternal years of education

−0.065

[−0.139, 0.010]

0.091

Marital status at pregnancy (unmarried)

1.028

[0.010, 2.046]

0.048

Annual household income

3 - 7.9 million yen

0.268

[−0.193, 0.728]

0.255

<3 million yen

0.451

[−0.336, 1.239]

0.261

Maternal history of depression and/or anxiety disorders (yes)

0.049

[−0.478, 0.576]

0.857

Infant gender (male)

0.103

[−0.235, 0.440]

0.551