Table 5
Association (odds ratio (95% CI) for interquartile change) between nitrogen dioxide and ozone and mortality, controlling for pollen and spores
| More than one admission: always asthma* | ||
|---|---|---|
| Nitrogen dioxide | Ozone | |
| *Adjusted for epidemic days. Conducted in years 1985 and 1988–94 for the non-adjusted model and after including pollen; and for the years 1990–4 after including spores. | ||
| Not adjusted | 1.688 (1.074 to 2.652) | 1.755 (0.984 to 3.133) |
| Adjusted for: | ||
| Total pollen | 1.655 (1.057 to 2.621) | 1.736 (0.971 to 3.102) |
| Gramineas | 1.689 (1.074 to 2.655) | 1.758 (0.984 to 3.142) |
| Total spores | 1.599 (0.911 to 2.809) | 1.931 (0.975 to 3.825) |
| Cladosporium | 1.598 (0.904 to 2.826) | 1.964 (0.990 to 3.896) |
| Alternaria | 1.610 (0.916 to 2.827) | 1.949 (0.968 to 3.928) |
