Table 3.
Odds ratios (ORs) with 95% confidence interval (CI) for offspring ADHD among children without parental ADHD or maternal psychiatric diagnosis other than PTSD for each variable in model II for offspring
| Variable | Parameter | OR (95% CI) |
|---|---|---|
| Children without parental ADHD | Without maternal mental disorder | Reference group |
| Without maternal mental disorder other than PTSD | 2.32 (1.30–4.14) | |
| Sex | Boy | Reference group |
| Girl | 0.30 (0.29–0.32) | |
| Birth year offspring | 2006 | Reference group |
| 2007 | 0.80 (0.75–0.84) | |
| 2008 | 0.64 (0.61–0.68) | |
| 2009 | 0.46 (0.43–0.49) | |
| 2010 | 0.32 (0.30–0.34) | |
| Maternal age | <19 | 1.14 (0.94–1.38) |
| 19–35 | Reference group | |
| >35 | 0.87 (0.82–0.93) | |
| Missing | – | |
| Paternal age | <19 | 0.76 (0.51–1.12) |
| 19–35 | Reference group | |
| >35 | 1.05 (1.00–1.10) | |
| Missing | 0.87 (0.73–1.03) | |
| Family situation | Cohabiting | Reference group |
| Single parent | 2.04 (1.80–2.32) | |
| Other family situation | 1.61 (1.47–1.77) | |
| Missing | 1.42 (1.30–1.55) | |
| Disposable income | 1st quintile (lowest) | 2.14 (1.99–2.31) |
| 2nd quintile | 1.99 (1.85–2.15) | |
| 3rd quintile | 1.71 (1.59–1.84) | |
| 4th quintile | 1.25 (1.16–1.34) | |
| 5th quintile (highest) | Reference group | |
| Missing data | 1.76 (1.20–2.60) | |
| Migration status | Both parents born in Sweden | Reference group |
| One parent born in Sweden | 0.81 (0.77–0.86) | |
| Both parents born outside Sweden | 0.54 (0.50–0.58) | |
| Smoking | Non-smoking during pregnancy | Reference group |
| Smoking during pregnancy | 1.92 (1.83–2.02) | |
| Parity | First child | Reference group |
| 2nd child or later order | 0.75 (0.71–0.78) | |
| Missing | 0.58 (0.50–0.68) | |
| Pregnancy complications | No | Reference group |
| Yes | 1.16 (1.11–1.21) | |
| Major somatic disorders | Yes | Reference group |
| No | 0.78 (0.64–0.94) |