Table 1.
Demographic and clinical characteristics of people newly diagnosed with vitiligo (vitiligo cases) and matched controls without vitiligo
| Matched controls | Vitiligo cases | SMD | |
|---|---|---|---|
| Total number of patients | 28 880 | 7224 | |
| Age, median [IQR] | 44.0 [32.0–58.0] | 44.0 [33.0–58.0] | 0.004 |
| Age group, years, n (%) | 0.005 | ||
| 18–29 | 5534 (19.2) | 1377 (19.1) | |
| 30–40 | 6087 (21.1) | 1526 (21.1) | |
| 40–49 | 5822 (20.2) | 1463 (20.3) | |
| 50–59 | 5006 (17.3) | 1251 (17.3) | |
| 60–69 | 3647 (12.6) | 918 (12.7) | |
| 70–79 | 2155 (7.5) | 534 (7.4) | |
| ≥80 | 629 (2.2) | 155 (2.1) | |
| Gender, n (%) | <0.001 | ||
| Male | 13 576 (47.0) | 3396 (47.0) | |
| Female | 15 304 (53.0) | 3828 (53.0) | |
| Ethnicity, n (%) | 0.126 | ||
| White | 14 013 (48.5) | 3504 (48.5) | |
| Asian or Asian British | 3200 (11.1) | 1060 (14.7) | |
| Black, African, Caribbean or Black British | 556 (1.9) | 170 (2.4) | |
| Mixed or multiple ethnic groups | 238 (0.8) | 66 (0.9) | |
| Other ethnic groups | 1155 (4.0) | 259 (3.6) | |
| Not stated | 949 (3.3) | 199 (2.8) | |
| Missing | 8769 (30.4) | 1966 (27.2) |
For additional baseline clinical characteristics, see Supplementary Table 2.1. SMD, standardised mean difference; IQR, interquartile range.