Table 1. Demographics of Study Participants.
| Characteristic | EPP (n = 204) |
XLP (n = 22) |
|---|---|---|
| Demographic | ||
| Age at enrollment, mean (SD), y | 35.8 (17.0) | 45.2 (14.4) |
| Age, median (range), y | 34.0 (3-77) | 49.0 (21-67) |
| Sex, No. (%) | ||
| Male | 103 (50.5) | 10 (45.5) |
| Female | 101 (49.5) | 12 (54.5) |
| Race/ethnicity, No. (%) | ||
| White | 197 (96.5) | 20 (90.9) |
| African American | 0 | 2 (9.1) |
| Hispanic | 0 | 0 |
| Asian | 3 (1.5) | 0 |
| Other | 4 (2.0) | 0 |
| Clinical | ||
| Age at first symptom, No. (%)a | ||
| <1 y | 79 (38.7) | 5 (50.0)/2 (16.7) |
| 1-12 y | 109 (53.4) | 5 (50.0)/5 (41.7) |
| 13-17 y | 4 (2.0) | 0/2 (16.7) |
| ≥18 y | 2 (1.0) | 0/2 (16.7) |
| Unsure | 1 (0.5) | 0/0 |
| No symptoms | 0 | 0/1 |
| No response | 9 (4.4) | 0/0 |
Abbreviations: EPP, erythropoietic protoporphyria; XLP, X-linked protoporphyria.
a
Data for XLP given as number (percentage for male/female patients). In the XLP group, 10 were male and 12 were female patients.