Pre-existing systemic diseases in 140 ulcer episodes
| Systemic diseases | Fluoroquinolone | Fortified-Combined | Total (n=71) (51.3%) |
| Diabetes | 9 (16.7%) | 9 (10.7%) | 18 (13.0%) |
| Hypertension | 10 (18.5%) | 11 (13.1%) | 21 (15.2%) |
| Rheumatoid arthritis | 6 (11.1%) | 4 (4.8%) | 10 (7.2%) |
| Others (asthma, gout, peptic ulcer, IHD) | 12 (22.2%) | 10 (11.9%) | 22 (15.9%) |