Table 2.
Association of type 2 diabetes, diabetes duration, diabetes treatment, and age at time of diabetes diagnosis with severe central scalp hair loss⁎ (Black Women’s Health Study, 1995-2015)
| Cases/person-years | HR (95% CI) |
||
|---|---|---|---|
| Age-adjusted | Multivariable† | ||
| No diabetes | 714/89092 | 1.0 | 1.0 |
| Diabetes | 129/5806 | 1.87 (1.54-2.28) | 1.68 (1.38-2.06) |
| Duration of diabetes, years | |||
| < 5 | 48/2499 | 1.74 (1.29-2.29) | 1.56 (1.16-2.11) |
| 5 ≤ 10 | 39/1870 | 1.73 (1.25-2.45) | 1.55 (1.11-2.15) |
| ≥ 10 | 42/1437 | 2.27 (1.64-3.13) | 2.05 (1.48-2.85) |
| Age at diabetes diagnosis, years | |||
| < 50 | 71/3636 | 1.92 (1.54-2.39) | 1.69 (1.34-1.70) |
| ≥ 50 | 51/1981 | 1.51 (1.24-1.84) | 1.39 (1.13-1.70) |
| Use of diabetes medication‡ | |||
| No treatment | 42/2084 | 1.84 (1.34-2.52) | 1.68 (1.22-2.31) |
| Used insulin | 17/729 | 1.80 (1.10-2.95) | 1.55 (0.94-2.56) |
| Used pills only | 70/2994 | 1.92 (1.49-2.47) | 1.72 (1.33-2.22) |
CI, confidence interval; HR, hazard ratio
⁎
No diabetes is reference group for all comparisons.
†
Adjusted for age (continuous), body mass index (< 25, 25-29, 30-34, 35-39, ≥ 40, unknown), and years of education (≤ 12, 13-15, 16, ≥ 17)
‡
Among diabetic participants.