Table 2.
Patient demographics, clinical characteristics, and comorbidities (n = 6350)
| Age in years, mean (SD) | 42.4 (22.1) |
| No. (%) of patients within age group (years) | |
| ≤5 | 456 (7.2) |
| 6–11 | 357 (5.6) |
| 12–17 | 326 (5.1) |
| 18–44 | 2069 (32.6) |
| 45–64 | 1976 (31.1) |
| 65+ | 1166 (18.4) |
| Female, no. (%) | 4336 (68.3) |
| Region, no. (%) | |
| Midwest | 1523 (24.0) |
| Northeast | 801 (12.6) |
| South | 2924 (46.0) |
| West | 1102 (17.4) |
| Number of chronic conditions, mean (SD) [median] | 3.3 (2.2) [3] |
| Charlson comorbidity index, mean (SD) [median] | 0.9 (1.6) [0] |
| Physicians providing usual carea, no. (%) | |
| Primary care | 3300 (52.0) |
| Allergist | 1210 (19.1) |
| Miscellaneousb | 1109 (17.5) |
| Dermatologist | 538 (8.5) |
| Unknown | 193 (3.0) |
| Angioedemac, no. (%) | 1490 (23.5) |
| Related conditions, no. (%) | |
| Allergic rhinitis | 2745 (43.2) |
| Other allergy | 1335 (21.0) |
| Asthma | 1165 (18.3) |
| Atopic dermatitis | 493 (7.8) |
| Vasculitis and allergic purpura | 27 (0.4) |
SD standard deviation
a“Usual care” is defined as the specialty accounting for the largest proportion of a given patients’ evaluation and management visits
bAll included specialties individually accounted for <2 % of patients
cPresence of an International Classification of Diseases, 9th Revision, Clinical Modification code of 995.1 (angioedema, not hereditary) during the study period