Table 2. Diseases that Fulfilled the Criteria for RLS in Chang Gung Sleep Center.

	n (%)
Iron deficiency	15 (12.4%)
With anemia	5 (4.1%)
Without anemia	10 (8.3%)
Thyroid dysfunction	4 (3.3%)
Hyperthyroidism	2 (1.7%)
Hypothyroidism	2 (1.7%)
Obstructive sleep apnea	67 (55.4%)
Neuropathy	35 (28.9%)
Peripheral neuropathy	17 (14.0%)
Polyneuropathy	8 (6.6%)
Radiculopathy	3 (2.5%)
Myelopathy	7 (5.8%)
End-stage renal disease	9 (7.4%)
Parkinson's disease	5 (4.1%)
Rheumatic disease	2 (1.7%)
Medication-related (antidepressants)	2 (1.7%)