Table 4
Multiple regression model of children's classroom adjustment (teacher-rating scale) (comparison of the effects of the differences (mean (95 % CIs)) between the two samples)
| Population study* | Extreme exposure study† | |||
|---|---|---|---|---|
| Coefficient | Mean difference‡ (95% CI) | p Value | Mean difference‡ (95% CI) | p Value |
| *Representative sample; †sampling on exposure extremes (<50 dB,A,Ldn; >60 dB,A,Ldn); ‡differences based on the following contrasts: maternal education (high school v basic), male v female, people in household (6 v 3), house type (multiple dwelling v single family), biological risk=1 (birth weight <2500 g or <37 weeks of gestation) v 0 (normal birth weight/length of gestation), noise exposure (65 v 40 dB,A,Ldn ; >60 v <50 dB,A,Ldn). | ||||
| Maternal education (1–5) | −1.20 ( 0.82 to 1.58) | <0.0001 | −0.88 (−0.16 to 1.92) | 0.1013 |
| Sex (male/female) | −1.04 (−1.33 to −0.74) | <0.0001 | −1.39 (−2.23 to −0.55) | 0.0017 |
| People in household (1–9) | −0.14 (−0.52 to 0.25) | 0.4878 | 0.94 (0.02 to 1.87) | 0.0489 |
| House type (1–3) | −0.48 (−0.85 to −0.11) | 0.0112 | −0.04 (−1.07 to 1.00) | 0.9472 |
| Biological risk (0–1) | −0.33 (−0.71 to 0.05) | 0.0855 | −0.53 (−1.68 to 0.63) | 0.3720 |
| Noise exposure (30–75) | −0.58 (−1.06 to −0.09) | 0.0196 | 1.11 ( 0.28 to 1.95) | 0.0105 |
| R2=0.09 | R2=0.21 | |||
