Table 3.
Past medical history between those with and without a history of premature hair graying
| Participant characteristics | History of PHG, n (%) | No history of PHG, n (%) | OR (95% CI) | P |
|---|---|---|---|---|
| Number of participants | 216 | 251 | ||
| Past medical history | ||||
| Hair loss | 63 (29.2) | 77 (30.7) | 0.930 (0.625-1.385) | 0.722 |
| Hypertension | 28 (13.0) | 38 (15.1) | 0.835 (0.493-1.413) | 0.501 |
| Hyperlipidemia | 24 (11.1) | 27 (10.8) | 1.037 (0.579-1.857) | 0.903 |
| Diabetes mellitus | 6 (2.8) | 10 (4.0) | 0.689 (0.246-1.927) | 0.475 |
| CVD | 1 (0.5) | 4 (1.6) | 0.287 (0.032-2.589) | 0.379 |
| Anxiety | 54 (25.0) | 69 (27.5) | 0.879 (0.581-1.331) | 0.542 |
| Depression | 61 (28.2) | 58 (23.1) | 1.310 (0.863-1.987) | 0.204 |
| Bipolar disorder | 5 (2.3) | 5 (2.0) | 1.166 (0.333-4.082) | 1.000 |
| Iron-deficiency anemia | 35 (16.2) | 32 (12.7) | 1.323 (0.788-2.222) | 0.288 |
| Pernicious anemia | 1 (0.5) | 0 (0.0) | - | 0.463 |
| Celiac disease | 1 (0.5) | 2 (0.8) | 0.579 (0.052-6.430) | 1.000 |
| Inflammatory bowel disease | 1 (0.5) | 5 (2.0) | 0.229 (0.027-1.974) | 0.224 |
| IBS | 22 (10.2) | 15 (6.0) | 1.784 (0.901-3.533) | 0.093 |
| Cystic fibrosis | 0 (0.0) | 1 (0.4) | - | 1.000 |
| Autoimmune disease | ||||
| Systemic lupus erythematosus | 0 (0.0) | 3 (1.2) | - | 0.253 |
| Diabetes mellitus type 1 | 0 (0.0) | 1 (0.4) | - | 1.000 |
| Vitiligo | 0 (0.0) | 0 (0.0) | - | - |
| Hypothyroidism | 15 (6.9) | 14 (5.6) | 1.263 (0.595-2.680) | 0.542 |
| Hyperthyroidism | 3 (1.4) | 3 (1.2) | 1.164 (0.233-5.829) | 1.000 |
| Rheumatoid arthritis | 3 (1.4) | 0 (0.0) | - | 0.098 |
PHG – Premature hair graying; CI – Confidence interval; OR – Odds ratio; IBS – Irritable bowel syndrome; CVD – Cardiovascular disease