Skip to main content

Table 5 Associations between ASD and socio-demographic and perinatal risk factors in the final sample of ASD cases and POP controls and the total invited sample of likely cases and controls

From: Assessment of demographic and perinatal predictors of non-response and impact of non-response on measures of association in a population-based case control study: findings from the Georgia Study to Explore Early Development

  Final complete sample
ASD versus POP
Total invited sample
Likely ASD versus Likely POP
  Unadjusted OR (95% CI) Adjusted ORa (95% CI) Unadjusted OR (95% CI) Adjusted ORa (95% CI)
Child sex female 0.2 (0.10.4) 0.2 (0.10.4) 0.3 (0.20.4) 0.3 (0.20.4)
Maternal age > 35 years 1.2 (0.7–2.0) 1.3 (0.7–2.4) 1.7 (1.32.2) 1.7 (1.32.2)
Previous live births ≥ 1 0.8 (0.5–1.3) 0.8 (0.5–1.3) 0.8 (0.6–1.0) 0.8 (0.6–1.0)
Maternal education > 12 years 1.0 (0.6–1.6) 1.0 (0.6–1.8) 1.7 (1.32.0) 1.7 (1.32.1)
Maternal race/ethnicity
NOT non-Hispanic white
1.3 (0.8–2.0) 1.5 (0.8–2.5) 0.9 (0.7–1.1) 1.1 (0.8–1.3)
Maternal marital status NOT married 0.8 (0.5–1.4) 0.8 (0.4–1.3) 0.9 (0.7–1.1) 0.9 (0.8–1.2)
Preterm delivery (< 37 weeks’ gestation) 1.6 (0.8–3.2) 1.8 (0.8–3.9) 1.7 (1.32.3) 1.9 (1.42.5)
Cesarean delivery (primary or repeat) 1.3 (0.7–2.6) 1.1 (0.5–2.4) 1.3 (1.0–1.8) 1.3 (0.9–1.7)
Induction/stimulation of labor 1.4 (0.7–2.7) 1.4 (0.6–3.2) 1.0 (0.7–1.3) 0.9 (0.6–1.2)
  1. Data in italics indicate the confidence interval for the effect estimate does not include 1.0
  2. aFor each factor, ORs were adjusted for the following factors if they were relevant as potential confounders (i.e. not the risk factor of interest): child sex, maternal age, previous live birth, maternal education, maternal race/ethnicity, and maternal marital status