The low- and high-MaternalEd groups were matched with respect to age, hearing thresholds (pure tone average for right and left ear), and birth weight
| Low-MaternalEd | High-MaternalEd | t | Significance (two-tailed) | |
|---|---|---|---|---|
| Age (years) | Mean, 14.52; SD, 0.51 | Mean, 14.58; SD, 0.50 | −0.49 | 0.63 |
| Hearing thresholds, (dB hearing level) | Mean, 6.79; SD, 4.55 | Mean, 5.55; SD, 4.77 | 1.08 | 0.28 |
| Birth weight (lb)a | Mean, 7.15; SD, 1.22 | Mean, 7.47; SD, 1.48 | −0.85 | 0.40 |
↵aInformation not available on 11 participants.