Table 2.

Odds ratios (ORs) with 95% confidence interval (CI) for offspring ADHD among children by exposure to prenatal PTSD

Population	Crude	Model I	Model II	Model III	Model IV
Children without prenatal PTSD	Reference group	Reference group	Reference group	Reference group	Reference group
Total population of children with prenatal PTSD (n = 553 766)	1.79 (1.37–2.34)	1.62 (1.23–2.13)	1.43 (1.09–1.88)	0.85 (0.65–1.13)	0.86 (0.65–1.14)
Children with prenatal PTSD without parental ADHD (n = 535 651)	1.48 (1.06–2.08)	1.42 (1.01–2.00)	1.25 (0.89–1.76)	0.87 (0.62–1.22)	0.92 (0.65–1.29)
Children with prenatal PTSD without parental ADHD or maternal psychiatric diagnosis other than PTSD (n = 506 222)	2.72 (1.56–4.76)	2.51 (1.42–4.45)	2.32 (1.30–4.14)a	NA	NA

Note: Model I – Including child’s sex, year of birth, maternal age, paternal age, family situation, disposable family income, and parental country of birth.

Model II – Model I + Maternal smoking during pregnancy, parity and pregnancy complications and major somatic disorders.

Model III – Including child’s sex, ADHD in parents (only in the total population) and maternal mental disorder.

Model IV – Including all the factors in models I–III.

^aAs this group is without ADHD in parents or any maternal mental disorder, model II is the mutually inclusive model for this group.