Multiple regression model of children's psychological health (self reporting scale) (comparison of the effects (mean differences (95 % confidence intervals)) in 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, persons in household (6 v 3), house type (multiple dwelling v single family), interaction term: noise exposure=1 (65 dB,A,Ldn ; >60 dB,A,Ldn) and biological risk=1 (birth weight <2500 g or <37 weeks of gestation). | ||||
| Maternal education (1–5) | 3.96 (1.88 to 6.04) | 0.0002 | 2.12 (−3.65 to 7.88) | 0.4733 |
| Sex (male-female) | −1.47 (−3.09 to 0.15) | 0.0762 | 2.03 (−2.53 to 6.60) | 0.3853 |
| People in household (1–9) | −2.47 (−4.59 to −0.35) | 0.0227 | −0.55 (−5.65 to 4.55) | 0.8330 |
| House type (1–3) | −3.32 (−5.32 to −1.32) | 0.0012 | 4.47 (−1.08 to 10.03) | 0.1180 |
| Biological risk (0–1) | −5.85 (−10.07 to −1.64) | −15.01 (−22.83 to −7.19) | ||
| Noise exposure (30–75) | −2.77 (−5.46 to −0.08) | −16.90 (−28.37 to −5.42) | ||
| Risk×noise | 0.0344 | 0.0470 | ||
| R2=0.04 | R2=0.23 | |||