TABLE 1.
Characteristics of patients with a diagnosis of AA between 2012 and 2019, according to the JMDC Claims Database
| Characteristic | |
|---|---|
| All patients | N = 61 899 |
| Mean age, years (SD) | 35.8 (16.3) |
| Median age, years | 38 |
| Age range, years | 0–74 |
| Male, n (%) | 26 634 (43) |
| Female, n (%) | 35 265 (57) |
| Severe subtypes | |
| Alopecia totalis | n = 29 |
| Mean age, years (SD) | 34.3 (15.3) |
| Male, n (%) | 9 (31) |
| Female, n (%) | 20 (69) |
| Alopecia universalis | n = 406 |
| Mean age, years (SD) | 37.3 (14.7) |
| Male, n (%) | 174 (42.9) |
| Female, n (%) | 232 (57.1) |
| Alopecia ophiasis | n = 19 |
| Mean age, years (SD) | 34.4 (16.2) |
| Male, n (%) | 4 (21.1) |
| Female, n (%) | 15 (78.9) |
| Widespread alopecia | n = 1043 |
| Mean age, years (SD) | 35.9 (15.3) |
| Male, n (%) | 446 (42.8) |
| Female, n (%) | 597 (57.2) |
| Diagnosed by a dermatologist | Approximately 70% |
| New AA diagnosis | 50 547 |
| Male, n (%) | 21 301 |
| Female, n (%) | 29 246 |
Abbreviations: AA, alopecia areata; JMDC, Japan Medical Data Center; SD, standard deviation.