Table 1.
Features of the participants. Data represent the mean ± standard deviation or the number of participants (%).
| Feature | Participants (N=1,074) |
|---|---|
| Age (months) | 32.7 ± 14.7 |
| Age of symptom onset (months) | 12.9 ± 10.6 |
| Male | 681 (63.4) |
| Self-reported race | |
| White | 733 (68.2) |
| Black | 235 (21.9) |
| Asian | 22 (2.0) |
| More than one race | 60 (5.6) |
| Reported as “other” | 24 (2.2) |
| Hispanic ethnicity | 283 (26.4) |
| Family medical history | |
| Mother with asthma | 352 (32.8) |
| Mother with allergies | 280 (26.1) |
| Father with asthma | 397 (37.0) |
| Father with allergies | 308 (28.7) |
| Household exposures | |
| Tobacco smoke | 293 (27.3) |
| Cat | 169 (15.7) |
| Dog | 325 (30.3) |
| Self-reported triggers | |
| Inhaled allergens | 566 (52.7) |
| Exercise | 524 (48.8) |
| Respiratory infections | 1,027 (95.6) |
| Chemicals/irritants | 219 (20.4) |
| Weather changes | 765 (71.2) |
| Cold air | 549 (51.1) |
| Emotions | 328 (30.5) |
| Tobacco | 265 (24.7) |
| Food | 51 (4.7) |
| Ever had eczema | 513 (47.8) |
| Medication use in past year (at any time) | |
| Inhaled corticosteroid | 459 (42.7) |
| Leukotriene receptor antagonist | 113 (10.5) |
| Exacerbation history (past year) | |
| Any oral corticosteroid burst | 684 (63.7) |
| Number of oral corticosteroid bursts | 1.3 ± 1.3 |
| Any unscheduled visit | 1,037 (96.6) |
| Number of unscheduled visits | 3.5 ± 3.3 |
| Any Emergency Department visit | 801 (74.6) |
| Number of Emergency Department visits | 2.1 ± 2.0 |
| Any hospitalization | 126 (11.7) |