From: Screening for depressive symptoms in patients with rheumatoid arthritis: relationship with pain severity, disease activity, and sleep quality
RA with depression (n:1152)
RA without depression (n:48)
P value
Sleep quality
 Good sleep
376 (32.6%)
40 (83.3%)
< 0.001
 Poor sleep
776 (67.4%)
8 (16.7%)
Fatigue
972 (84.4%)
12 (25.0%)
Fibromyalgia
444 (38.5%)
0 (0.0%)