Table 3.
Mediation models of the relationship between road traffic noise (LAeq) and mental ill-health through noise annoyance
| Continuous symptoms score | Dichotomized symptoms score | |||
|---|---|---|---|---|
|
|
|
|||
| Depression | Anxiety | Depression(PHQ-9 ≥ 10) | Anxiety(GAD-7 ≥ 10) | |
|
|
|
|
|
|
| β (95% CI) | β (95% CI) | OR (95% CI) | OR (95% CI) | |
| Total effect | 0.13 (−1.20, 1.45) | 0.34 (−1.02, 1.70) | 0.86 (0.39, 1.93) | 1.16 (0.45, 2.99) |
| Direct effect | −0.17 (−1.51, 1.17) | −0.02 (−1.39, 1.36) | 0.71 (0.31, 1.61) | 0.93 (0.35, 2.46) |
| Indirect effect | 0.30 (0.01, 0.71) * | 0.35 (0.06, 0.76) * | 1.20 (1.03, 1.50) * | 1.20 (1.01, 1.52) * |
Note. Abbreviations: GAD-7–Generalized Anxiety Disorder 7-item, LAeq − equivalent daytime road traffic noise level, PHQ-9–Patient Health Questionnaire 9-item.The models are adjusted for gender, age, nationality, income adequacy, population density, and university faculty.Effect estimates of LAeq are reported per 5 dB(A) increase. Coefficients are unstandardized linear regression coefficients (β) and odds ratios (OR) with their 95% confidence intervals (CI). The indirect effects were tested using the percentile bootstrap 95% CI (based on 5000 resamples). Statistically significant associations (P-value<0.05) are denoted by an asterisk (*).