Table 4.
Multiple regression model of the association between cat (Fel d 1) allergen levels (concentration: μg/g and loading: μg/m2) and home characteristics
| Cat (concentration)
|
Cat (loading)
|
|||
|---|---|---|---|---|
| Home characteristics | Geometric mean (μg/g) | RR (95% CI) | Geometric mean (μg/m2) | RR (95% CI) |
| Number of cats | ||||
| No cat | 0.8 | 1 | 0.3 | 1 |
| One cat | 48.4 | 2.06 (1.90, 2.23) | 14.9 | 2.12 (1.94, 2.31) |
| Two or more cats | 108.1 | 2.18 (2.02, 2.37) | 36.4 | 2.17 (2.00, 2.36) |
| Number of dogs | ||||
| No dog | 2.2 | 1 | 0.7 | 1 |
| One dog | 1.6 | 0.85 (0.79, 0.92) | 0.5 | 0.88 (0.82, 0.95) |
| Two or more dogs | 1.7 | 0.81 (0.73, 0.91) | 0.9 | 0.92 (0.81, 1.04) |
| Number of residents | ||||
| ≤4 | 2.5 | 1 | 0.7 | |
| >4 | 1.2 | 0.90 (0.85, 0.97) | 0.4 | |
| Plants in PAR | ||||
| No | 1.8 | 0.6 | 1 | |
| Yes | 2.3 | 0.5 | 0.88 (0.82, 0.95) | |
| Relative humidity in PAR | ||||
| <30 | 2.3 | 0.7 | 1 | |
| 30–50 | 2.1 | 0.7 | 0.94 (0.84, 1.04) | |
| ≥50 | 1.1 | 0.3 | 0.83 (0.72, 0.96) | |
| Carpet | ||||
| No | 0.9 | 0.1 | 1 | |
| Yes | 2.1 | 0.7 | 1.28 (1.13, 1.45) | |
| Vacuuming frequency | ||||
| ≤once/week | 2.9 | 0.9 | 1 | |
| 2 times/week–once/day | 1.6 | 0.5 | 0.91 (0.85, 0.97) | |
| ≥once/day | 1.5 | 0.6 | 0.96 (0.87, 1.06) | |