Table 2.
The results of the general regression models and the metaregression model in the univariate and multivariate analyses in the study sites (GDA—Gdansk, WAW—Warsaw, KRA—Krakow, WRO—Wroclaw, LOD—Lodz, SZC—Szczecin, WAL—Walbrzych). The subsequent rows show: the percentage of the RSV hospitalizations explained by the air pollution (R2) model with and without interactions, the degree of freedom for each study site, the number of statistically significant effects in the models with and without interactions (YYYY—year of the study), and statistically significant effects in the multivariate and univariate models according to the study site.
| RSV | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| City code | GDA | WAW | KRA | WRO | LOD | SZC | WAL | ||
| percentage of RSV hospitalizations explained by the air pollution (R2) model with interactions | Adjusted R2 (interactions) | 30.5% | 29.6% | 20.4% | 14.8% | 16.2% | 12.6% | 8.4% | |
| Metaregression | |||||||||
| 31.4% | |||||||||
| percentage of RSV hospitalizations explained by the air pollution (R2) model without interactions | Adjusted R2 (univariate) | 31.4% | 25.2% | 17.3% | 9.2% | 14.7% | 10.1% | 4.9% | |
| Metaregression | |||||||||
| 23% | |||||||||
| degree of freedom | Df = n − 1 | 3 634 | 1 698 | 1 897 | 1 678 | 1 686 | 1 691 | 1 262 | Sum of the effects |
| Interactions | YYYY | 1 | 3 | 3 | 4 | 1 | 3 | 2 | 17 |
| PM10 | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 10 | |
| PM2.5 | 1 | 2 | 3 | 2 | 2 | 1 | 1 | 12 | |
| NO2 | 1 | 0 | 3 | 2 | 2 | 1 | 1 | 10 | |
| Univariate factors | YYYY | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
| PM10 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 4 | |
| PM2.5 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 5 | |
| NO2 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 5 | |
| Interactions | YYYY | PM2.5 | PM2.5*NO2 | PM2.5 | YYYY*NO2 | NO2 | NO2 | ||
| NO2*PM2.5 | PM10 | PM2.5*PM10 | PM10 | NO2*PM2.5 | YYYY | YYYY*PM2.5 | |||
| PM10 | YYYY | PM10*NO2 | NO2 | PM2.5*PM10 | YYYY*PM2.5 | YYYY*PM10 | |||
| YYYY*PM2.5 | YYYY | YYYY*NO2 | YYYY*PM10 | ||||||
| YYYY*PM10 | YYYY*NO2 | YYYY | |||||||
| YYYY*PM2.5 | YYYY*PM10 | ||||||||
| YYYY*PM2.5 | |||||||||
| Univariate factors | YYYY | YYYY | YYYY | PM2.5 | YYYY | YYYY | NO2 | ||
| PM2.5 | PM2.5 | PM2.5 | PM10 | PM2.5 | NO2 | YYYY | |||
| PM10 | PM10 | PM10 | YYYY | ||||||
| NO2 | NO2 | NO2 | |||||||