Table 3.

Mean (SD) Restless Leg Syndrome Symptom Severity by Substance Use Disorder

Severity variable	Opioid Use Disorder (n=63)	Alcohol Use Disorder (n=39)	t
Symptom severity (rated 0–4)
Overall	2.54 (0.64)	1.95 (0.73)	4.25**
Sleep disturbance due to symptoms	2.52 (0.98)	1.74 (0.97)	3.93**
Time (rated 0–10)
At bedtime	7.63 (1.80)	5.82 (2.41)	4.34**
During the night	7.13 (2.01)	5.58 (2.43)	3.40*
During the day while resting	5.11 (2.38)	3.53 (2.64)	3.06*
During the day while active	2.83 (2.52)	1.47 (1.83)	2.88*

^*p<.01,

^**p<.001