Table 3. Demographic and clinical characteristics of rheumatoid arthritis patients who were divided into poor and good sleep groups (PSQI > 5 vs. PSQI ≤ 5).

Values are presented as mean ± SD, median (range), or number (%).

PSQI, Pittsburgh sleep quality index; VAS, visual analog scale; BDI-II, Beck Depression Inventory second edition; DMARD, disease modifying anti-rheumatic drug.