Table 2.
Estimated effect of a 10-μg/m3 increase in annual average home outdoor NO2 concentrations [β (95% CI)] on SBP (mmHg).
| Models for SBPa | n | Adjusted for noise | Unadjusted for noise |
|---|---|---|---|
| Nonmedicated | 2,685 | 1.34 (0.14, 2.55) | 0.59 (–0.15, 1.34) |
| Medicated | 1,015 | 1.19 (–1.37, 3.75) | 0.68 (–1.09, 2.44) |
| Without adjustment for medication | 3,700 | 1.11 (–0.03, 2.24) | 0.56 (–0.17, 1.28) |
| With adjustment for medication | 3,700 | 1.35 (0.23, 2.47) | 0.67 (–0.04, 1.38) |
| + 10 mmHgb | 3,700 | 0.78 (–0.43, 2.00) | 0.41 (–0.36, 1.18) |
| + 15 mmHgb | 3,700 | 0.62 (–0.65, 1.89) | 0.33 (–0.47, 1.14) |
| + 20 mmHgb | 3,700 | 0.46 (–0.88, 1.80) | 0.26 (–0.59, 1.11) |
| Censored regression | 3,700 | 0.38 (–0.98, 1.73) | 0.12 (–0.73, 0.97) |
| aAll multivariate linear regression models were adjusted for age, age squared, sex, living alone, education, diabetes, BMI, nighttime railway noise, nighttime traffic noise, smoking, alcohol consumption, deprivation, daily NO2, and temperature (lag 0). Models additionally were adjusted for noise (nighttime railway and traffic noise) and BP-lowering medication if specified in table. bAddition to SBP for participants with BP-lowering medications. | |||