Table 1. Characteristics of the study patients of the AITD (n=3,659) and control group (n=18,295).
| Variables | Control group (n=18,295) | AITD group (n=3,659) | P value |
|---|---|---|---|
| CSU | 0.001 | ||
| No event | 17,585 (96.1) | 3,436 (93.9) | |
| Event | 710 (3.9) | 223 (6.1) | |
| Age group (year) | 1.000 | ||
| 20-39 | 6,805 (37.2) | 1,361 (37.2) | |
| 40-64 | 9,570 (52.3) | 1,914 (52.3) | |
| >65 | 1,920 (10.5) | 384 (10.5) | |
| Gender | 1.000 | ||
| Male | 3,520 (19.2) | 704 (19.2) | |
| Female | 14,775 (80.8) | 2,995 (80.8) | |
| Household income (%) | <0.001 | ||
| 0–20 | 3,100 (18.3) | 443 (12.1) | |
| 21–100 | 15,195 (83.1) | 3,216 (87.9) | |
| Resident area | <0.001 | ||
| Urban | 8,643 (47.2) | 1,849 (50.5) | |
| Rural | 9,652 (52.8) | 1,810 (49.5) | |
| Comorbidities | |||
| Type 2 DM | 939 (5.3) | 297 (8.3) | <0.001 |
| Hypertension | 2,910 (16.3) | 942 (26.4) | <0.001 |
| Dyslipidemia | 1,220 (6.8) | 478 (13.4) | <0.001 |
| Allergic rhinitis | 4,207 (23.0) | 1,214 (33.2) | <0.001 |
| Atopic dermatitis | 273 (1.5) | 117 (3.2) | <0.001 |
| Asthma | 1,195 (6.5) | 364 (10.0) | <0.001 |
Data are presented as number of patients (%).
AITD, autoimmune thyroid disease; DM, diabetes mellitus.