TABLE 2.

Univariate Relationship Between Socioeconomic Characteristics of the Parents at the Time of Delivery of the Child and Risk for Hyperkinetic Disorder in the Offspring, Presented as RRs with 95% CIs From a Conditional Logistic Regression Model

MotherFather
NnRR (95% CI)*NnRR (95% CI)*
Years of schooling after basic school
    ≥321685912255901
    <316221092.5 (1.8–3.5)1244771.5 (1.1–2.1)
Annual income quartile
    Highest9313111102301
    Second highest983361.1 (0.7–1.8)1026281.0 (0.6–1.7)
    Second lowest1131441.1 (0.7–1.8)954532.1 (1.3–3.3)
    Lowest882592.0 (1.3–3.2)772512.5 (1.6–4.0)
Employed§
    Yes (included students)19615912571781
    No19031041.8 (1.3–2.5)1283842.2 (1.6–3.0)
Cohabitant status
    Married21587112168711
    Cohabitant with common children1263451.1 (0.7–1.5)1268461.1 (0.7–1.6)
    Cohabitant without common children11582.2 (1.1–4.6)116102.7 (1.4–5.5)
    Single391464.1 (2.8–6.0)297353.9 (2.5–6.0)
  • Hyperkinetic offspring n = 170 (F90.0 [n = 102]; F90.1 [n = 33]; F90.8 [n = 2]; F90.9 [n = 33]) and 3765 control subjects.

  • * Cases and control subjects are matched for age, gender, and calendar time.

  • Missing information for 145 and 266.

  • Missing information for 8 and 81.

  • § Missing information for 71 and 81.

  • Missing information for 8 and 86.