Table I.
Sample population demographics
| Sex | Number |
| Female | 99 |
| Male | 4 |
| Age, mean, SD, (range), y | 64.0, 11.99, (31-88) |
| BMI, mean, SD, kg/m2 | 27.1, 3.19 |
| Race | |
| Caucasian | 87 |
| Black | 6 |
| Asian | 5 |
| Diagnosis | |
| Lichen planopilaris | 61 |
| Frontal fibrosing alopecia | 42 |
| Smoking status | |
| Daily smoker | 18 (17.5%) |
| Never smoker | 71 (68.9%) |
| Unknown | 14 (13.6%) |
| Smoking prevalence in US population | 16.7% |
| Diabetes status | |
| Type 1 diabetes | 13 (12.6%) |
| Nondiabetic | 46 (44.7%) |
| No data available | 44 (42.7%) |
| Diabetes prevalence in US population | 11.7% |
BMI, Body mass index.