Table 6.

Frequency of PROMIS Sleep Assessments T-Scores for Study 1 and Study 2

	Study 1	Study 2
PROMIS Sleep Disturbance T-Scores
Within the normal limits	27 (73.0%)	26 (70.3%)
Mild sleep disturbance	6 (16.2%)	8 (23.5%)
Moderate sleep disturbance	4 (10.8%)	2 (5.4%)
Severe sleep disturbance	-	1 (2.7%)
PROMIS Sleep-Related Impairment T-Scores
Within the normal limits	24 (64.9%)	17 (45.9%)
Mild sleep-related impairment	7 (18.9%)	9 (24.3%)
Moderate sleep-related impairment	4 (10.8%)	11 (29.7%)
Severe sleep-related impairment	2 (5.4%)	-

Note: PROMIS = Patient-Reported Outcomes Measurement Information System. The T-score distribution has a mean of 50 and a standard deviation of 10 [39, 62]. The cut-points of mild, moderate, and severe correspond to 0.5, 1.0, and 2.0 standard deviations above the mean of the normative adult sample, respectively [65].