Table I.
Demographic characteristics of the PN group and comparison group without PN
| Characteristic | PN group, n = 695, % | Control group, n = 2,454,685, % |
|---|---|---|
| Sex | ||
| Male | 48.35 | 45.42 |
| Female | 51.65 | 54.58 |
| Race | ||
| White, Caucasian | 41.44 | 60.98 |
| Black, African American | 51.37 | 22.13 |
| Asian | 2.59 | 3.81 |
| American Indian or Alaskan native | 0.14 | 0.21 |
| Native Hawaiian, other | 0.14 | 0.05 |
| Pacific Islander | ||
| Other | 4.32 | 6.31 |
| Unknown | 1.15 | 8.13 |
| Declined to answer | 0.14 | 0.21 |
| Age, y | ||
| 40–49 | 25.61 | 32.85 |
| 50–59 | 44.93 | 36.34 |
| 60–69 | 29.46 | 30.80 |
In total, 695 patients aged 40–69 years who presented to Johns Hopkins Health System during April 2013-December 2017 with a visit diagnosis, billing diagnosis, or active problem list entry of PN were identified. The comparison population was 2,446,880 patients aged 40–69 years without a diagnosis of PN.
PN, Prurigo nodularis.