Table 1.
Demographic Characteristics of the Study Population Comprising 932 Individuals Divided in Different Groups After Allergy Status
| Characteristics | Cohort | Cases (Asthma + Perennial Allergy) | Asthma + Season Allergy | Asthma + No Allergy | Controls (Asthma and Season + No Allergy) | p-value (Cases vs Controls) |
|---|---|---|---|---|---|---|
| Subjects (n) | 932 | 544 | 210 | 178 | 388 | |
| Age (years) | 31.4 (±4.7) | 31.4 (±4.7) | 30.9 (±4.5) | 30.8 (±5) | 30.7 (±4.8) | 0.029 |
| BMI (kg/cm2) | 24.1 (±4.6) | 24 (±4.5) | 23.6 (±3.9) | 25 (±5.6) | 24.2 (±5.5) | 0.395 |
| Current smokers | 39 (4.2) | 15 (2.8) | 3 (1.7) | 19 (10.7) | 24 (6.2) | 0.010 |
| Ex-smokers | 215 (23) | 130 (23.9) | 34 (18.9) | 51 (24.5) | 85 (21.9) | 0.477 |
| Never smokers | 678 (72.7) | 399 (73.3) | 143 (79.4) | 136 (65.4) | 279 (71.9) | 0.627 |
| Mild asthma | 661 (71) | 392 (72.1) | 142 (78.9) | 102 (57.3) | 269 (69.3) | 0.366 |
| Moderate/severe asthma | 271 (29) | 152 (27.9) | 38 (21.1) | 76 (42.7) | 119 (30.7) | 0.366 |
| Primiparity | 626 (67.2) | 371 (68.2) | 111 (61.7) | 116 (65.2) | 255 (65.7) | 0.427 |
Notes: Data are given as mean with SD in brackets or numbers with percentages in brackets. Bold values indicate significant p-values <0.05.