Table 2 Odds ratio of ventricular arrhythmia (VA) associated with an interquartile range (IQR) increase in the 24 hour (lags 0–23) moving average pollutant concentration; St Louis ICD Study, 2001–02.
| Pollutant | IQR | No. subjects | No. VAs | Odds ratio | 95% CI |
|---|---|---|---|---|---|
| PM2.5 | 9.7 µg/m3 | 55 | 130 | 0.95 | 0.72 to 1.27 |
| Elemental carbon | 0.5 µg/m3 | 51 | 118 | 1.18 | 0.93 to 1.50 |
| Organic carbon | 2.3 µg/m3 | 51 | 118 | 1.08 | 0.81 to 1.43 |
| Nitrogen dioxide | 6 ppb | 55 | 134 | 1.22 | 0.94 to 1.60 |
| Carbon monoxide | 0.2 ppm | 55 | 133 | 0.99 | 0.80 to 1.21 |
| Sulphur dioxide | 5 ppb | 55 | 136 | 1.24 | 1.07 to 1.44 |
| Ozone | 18 ppb | 55 | 136 | 1.15 | 0.61 to 2.18 |