Table 3. Regression analysis of indoor and ambient PM2.5 mass concentrations.
| Indoor PM2.5 (including all families) | Indoor PM2.5 (excluding smoking families) | |||
|---|---|---|---|---|
| Ambient PM 2.5 (hourly data) | Slope (p-value) | 0.67(<0.0001) | Slope (p-value) | 0.68(<0.0001) |
| Intercept(p-value) | -1.99(0.039) | Intercept(p-value) | -3.51(1.05) | |
| R2 | 0.842 | R2 | 0.851 | |
| Ambient PM 2.5 (24-h average data) | Slope (p-value) | 0.73(<0.0001) | Slope (p-value) | 0.71(<0.0001) |
| Intercept(p-value) | -5.62(<0.0001) | Intercept(p-value) | -5.86(<0.0001) | |
| R2 | 0.910 | R2 | 0.901 | |