Table 3.
Association between maternal age at childbirth and parent-reported LD, ADHD, and either LD or ADHD.
| ≤ 17 | 18–24 | 25–29 | 30–34 | 35–39 | ≥40 | ||
|---|---|---|---|---|---|---|---|
| ADHD | Model 1 | 1.08 (0.72, 1.62) | 1.38 (1.04, 1.84) | 1 | 0.93 (0.61, 1.43) | 0.56 (0.34, 0.93) | 1.30 (0.49, 3.48) |
| Model 2 | 1.15 (0.75, 1.78) | 1.39 (1.04, 1.84) | 1 | 0.95 (0.62, 1.46) | 0.58 (0.35, 0.97) | 1.34 (0.50, 3.55) | |
| Model 3 | 1.04 (0.68, 1.60) | 1.34 (1.01, 1.79) | 1 | 0.99 (0.63, 1.53) | 0.60 (0.36, 1.00) | 1.48 (0.56, 3.93) | |
| LD | Model 1 | 2.05 (1.30, 3.25) | 1.58 (1.20, 2.08) | 1 | 1.23 (0.85, 1.78) | 1.18 (0.90, 1.56) | 1.98 (0.80, 4.92) |
| Model 2 | 1.69 (1.07, 2.67) | 1.39 (1.06, 1.83) | 1 | 1.35 (0.94, 1.95) | 1.31 (0.99, 1.74) | 2.34 (0.97, 5.70) | |
| Model 3 | 1.61 (0.99, 2.62) | 1.36 (1.02, 1.79) | 1 | 1.41 (0.96, 2.05) | 1.34 (1.01, 1.78) | 2.59 (1.05, 6.35) | |
| Either ADHD or LD | Model 1 | 1.88 (1.35, 2.61) | 1.63 (1.34, 1.98) | 1 | 1.12 (0.81, 1.55) | 1.05 (0.80, 1.39) | 1.91 (0.86, 4.24) |
| Model 2 | 1.72 (1.23, 2.39) | 1.52 (1.25, 1.85) | 1 | 1.18 (0.86, 1.63) | 1.12 (0.84, 1.50) | 2.13 (0.98, 4.63) | |
| Model 3 | 1.59 (1.12, 2.28) | 1.48 (1.20, 1.81)* | 1 | 1.23 (0.89, 1.70) | 1.15 (0.85, 1.54) | 2.35 (1.09, 5.09) |
Model 1: adjusted for age and sex.
Model 2: adjusted for age, sex, race, BMI, and PIR.
Model 3: adjusted for age, sex, race, BMI, PIR, smoking during pregnancy, and NHANES cycle.
*The P-value was less than the Bonferroni adjustment (0.010).