Table 1 Distribution of comorbidities among basal cell carcinoma cases and their matched controls
|  | BCC cases ( n =57 121), n (%) | BCC-free controls ( n =57 121), n (%) | OR crude (95% CI) |
|---|---|---|---|
Diseases of internal organs | |||
COPD | 2663 (4.7) | 2922 (5.1) | 0.90 (0.86–0.96) |
Diabetes mellitus | 5009 (8.8) | 5709 (10.0) | 0.86 (0.83–0.90) |
Hypertension | 22 235 (38.9) | 21 807 (38.2) | 1.04 (1.01–1.06) |
Gout | 3660 (6.4) | 3483 (6.1) | 1.06 (1.01–1.11) |
Rheumatoid arthritis | 1571 (2.8) | 1322 (2.3) | 1.20 (1.11–1.29) |
Inflammatory bowel disease | 729 (1.3) | 589 (1.0) | 1.24 (1.11–1.39) |
Depression | 8784 (15.4) | 8758 (15.3) | 1.00 (0.97–1.04) |
Schizophrenia | 271 (0.5) | 381 (0.7) | 0.71 (0.61–0.83) |
Dementia | 672 (1.2) | 945 (1.7) | 0.70 (0.63–0.77) |
Malignancies (excl. skin cancer) | 5247 (9.2) | 4015 (7.0) | 1.35 (1.29–1.41) |
Solid organ transplantation | 205 (0.4) | 41 (0.1) | 5.10 (3.63–7.16) |
Skin diseases | |||
Atopic dermatitis | 3761 (6.6) | 3305 (5.8) | 1.16 (1.10–1.22) |
Seborrhoeic dermatitis | 3514 (6.2) | 2686 (4.7) | 1.34 (1.27–1.41) |
Skin mycoses | 8560 (15.0) | 7263 (12.7) | 1.22 (1.18–1.27) |
Bacterial skin infections | 3948 (6.9) | 3388 (5.9) | 1.18 (1.13–1.24) |
Warts | 5462 (9.6) | 3642 (6.4) | 1.58 (1.51–1.65) |
Herpes infection | 6923 (12.1) | 6236 (10.9) | 1.13 (1.09–1.17) |
Psoriasis | 2480 (4.3) | 2319 (4.1) | 1.07 (1.01–1.14) |
Rosacea | 2346 (4.1) | 1671 (2.9) | 1.43 (1.34–1.53) |
Cutaneous malignant melanoma | 810 (1.4) | 332 (0.6) | 2.46 (2.16–2.80) |
