Table 1. Baseline and pre-COVID-19 features of the patients (n=277).
| n | % | Median | Min-Max | |
| Age (year) | 45 | 20-77 | ||
| Sex | ||||
| Male | 178 | 64.3 | ||
| Female | 99 | 35.7 | ||
| Working status | ||||
| Employed | 165 | 59.6 | ||
| Unemployed | 5 | 1.8 | ||
| Housewife | 58 | 20.9 | ||
| Retired | 49 | 17.7 | ||
| Comorbid disease | 89 | 32.1 | ||
| Hypertension | 48 | 32.1 | ||
| Diabetes mellitus | 17 | 6.1 | ||
| Cardiovascular disease | 15 | 5.4 | ||
| Pulmonary disease | 6 | 2.2 | ||
| Others | 25 | 9.0 | ||
| Smoking status | ||||
| Active | 100 | 36.1 | ||
| Quit | 65 | 23.5 | ||
| Never | 111 | 40.1 | ||
| Rheumatic diseases | ||||
| Spondyloarthritis | 229 | 82.7 | ||
| Axial spondyloarthritis | 202 | 88.2 | ||
| Psoriatic arthritis | 23 | 10.0 | ||
| Enteropathic arthritis | 4 | 1.7 | ||
| Rheumatoid arthritis | 48 | 17.3 | ||
| Medications | ||||
| Anti-tumor necrosis factor | 247 | 89.2 | ||
| Non-TNF biological DMARDs | 30 | 10.8 | ||
| Receiving infusion therapy | 54 | 19.5 | ||
| Min: Minimum; Max: Maximum; TNF: Tumor necrosis factor; DMARDs: Disease-modifying | ||||