Table 3.
Odds ratio estimates for age at onset and duration of allergic conditions
| Cases | Controls | AOR | |||
|---|---|---|---|---|---|
| Allergy Onset/Duration | N=345 | % | N=1285 | (95% CI) | |
| No Hay Fever | 239 | 72 | 777 | 63 | 1.00 |
| Hay Fever | 92 | 28 | 464 | 37 | 0.68 (0.52-0.89) |
| Age at onset | |||||
| 0-17 years | 20 | 6 | 124 | 10 | 0.58 (0.35-0.95) |
| 18-35 years | 30 | 9 | 134 | 11 | 0.81 (0.53-1.24) |
| 36+ years | 18 | 5 | 116 | 9 | 0.50 (0.30-0.84) |
| Time since onset | |||||
| <25 years | 18 | 5 | 130 | 10 | 0.50 (0.30-0.83) |
| 25-39 years | 23 | 7 | 110 | 9 | 0.78 (0.48-1.26) |
| 40+ years | 27 | 8 | 134 | 11 | 0.65 (0.42-1.00) |
| Duration | |||||
| 1-15 years | 16 | 5 | 111 | 9 | 0.50 (0.29-0.86) |
| 16-35 years | 28 | 8 | 118 | 10 | 0.87 (0.56-1.35) |
| 36+ years | 23 | 7 | 128 | 10 | 0.59 (0.37-0.95) |
| No Dust/Mold Allergy | 275 | 84 | 947 | 79 | 1.00 |
| Dust/Mold Allergy | 52 | 16 | 253 | 21 | 0.75 (0.54-1.04) |
| Age at onset | |||||
| 0-17 years | 12 | 4 | 67 | 6 | 0.70 (0.37-1.33) |
| 18-35 years | 7 | 2 | 75 | 6 | 0.35 (0.16-0.76) |
| 36+ years | 11 | 3 | 41 | 3 | 0.90 (0.45-1.78) |
| Time since onset | |||||
| <25 years | 8 | 2 | 44 | 4 | 0.69 (0.32-1.49) |
| 25-39 years | 5 | 2 | 69 | 6 | 0.28 (0.11-0.71) |
| 40+ years | 16 | 5 | 70 | 6 | 0.80 (0.45-1.40) |
| Duration | |||||
| 1-15 years | 4 | 1 | 37 | 3 | 0.41 (0.14-1.16) |
| 16-35 years | 8 | 2 | 56 | 5 | 0.55 (0.26-1.18) |
| 36+ years | 15 | 5 | 74 | 6 | 0.74 (0.42-1.31) |
| No Animal/Pet Allergy | 292 | 89 | 1024 | 83 | 1.00 |
| Animal/Pet Allergy | 37 | 11 | 212 | 17 | 0.68 (0.46-0.99) |
| Age at onset | |||||
| 0-17 years | 14 | 4 | 68 | 6 | 0.86 (0.47-1.57) |
| 18-35 years | 3 | 1 | 56 | 5 | 0.21 (0.07-0.69) |
| 36+ years | 6 | 2 | 37 | 3 | 0.57 (0.24-1.37) |
| Time since onset | |||||
| <25 years | 5 | 2 | 42 | 3 | 0.47 (0.18-1.21) |
| 25-39 years | 6 | 2 | 53 | 4 | 0.47 (0.20-1.12) |
| 40+ years | 11 | 3 | 66 | 5 | 0.63 (0.33-1.21) |
| Duration | |||||
| 1-15 years | 5 | 2 | 34 | 3 | 0.59 (0.23-1.52) |
| 16-35 years | 6 | 2 | 42 | 3 | 0.58 (0.24-1.39) |
| 36+ years | 10 | 3 | 62 | 5 | 0.63 (0.32-1.25) |
| No Eczema/Atopic Dermatitis | 276 | 84 | 1015 | 81 | 1.00 |
| Eczema/Atopic Dermatitis | 54 | 16 | 235 | 19 | 0.89 (0.64-1.24) |
| Age at onset | |||||
| 0-17 years | 14 | 4 | 60 | 5 | 0.92 (0.51-1.68) |
| 18-35 years | 8 | 2 | 50 | 4 | 0.64 (0.30-1.37) |
| 36+ years | 10 | 3 | 55 | 4 | 0.68 (0.34-1.35) |
| Time since onset | |||||
| <25 years | 11 | 3 | 56 | 4 | 0.79 (0.41-1.54) |
| 25-39 years | 7 | 2 | 41 | 3 | 0.71 (0.31-1.60) |
| 40+ years | 14 | 4 | 67 | 5 | 0.76 (0.42-1.38) |
| Duration | |||||
| 1-15 years | 10 | 3 | 76 | 6 | 0.51 (0.26-1.01) |
| 16-35 years | 7 | 2 | 40 | 3 | 0.72 (0.32-1.64) |
| 36+ years | 11 | 3 | 27 | 2 | 1.59 (0.77-3.26) |
| No Hay Fever, Dust/Mold or Animal/Pet Allergy | 222 | 66 | 680 | 55 | 1.00 |
| Hay Fever, Dust/Mold or Animal/Pet Allergy | 113 | 34 | 555 | 45 | 0.66 (0.51-0.86) |
| Age at onset | |||||
| 0-17 years | 31 | 9 | 155 | 13 | 0.68 (0.45-1.04) |
| 18-35 years | 28 | 8 | 153 | 12 | 0.62 (0.40-0.96) |
| 36+ years | 22 | 7 | 133 | 11 | 0.51 (0.31-0.82) |
| Time since onset | |||||
| <25 years | 22 | 7 | 147 | 12 | 0.51 (0.32-0.82) |
| 25-39 years | 24 | 7 | 124 | 10 | 0.68 (0.42-1.09) |
| 40+ years | 34 | 10 | 170 | 14 | 0.61 (0.41-0.92) |
AOR, age group-adjusted odds ratio (none of the covariates assessed were identified as confounders)
CI, confidence interval
Numbers may not add to total due to missing values