Table 1.

Demographics and sleep outcomes of study sample of ICD patients with self-reported sleep disturbance (N = 41)

Variable	Mean (SD)	Range
Age	60.34 (12.32)	20.00–84.00
Sex (M:F)	23:18	--
Time since ICD implantation (years)	3.61 (3.14)	(0.08–13.00)
Medical Conditions
Coronary Artery Disease (n,%)	7 (17%)	--
Cardiomyopathy (n, %)	3 (7%)	--
Congestive Heart Failure (n,%)	14 (34%)	--
History of Myocardial Infarction (n,%)	6 (15%)	--
Atrial Fibrillation (n,%)	19 (46%)	--
Psychiatric Diagnosis (n,%)	12 (29%)
Use of prescription sleep meds (n, %)	26 (63%)	--
MMSE	27.11 (1.82)	26.00–30.00
Anxiety score (STAI-Y)	36.15 (13.35)	20.00–72.00
Sleep Measure
TST-actigraphy (minutes)	409.77 (74.77)	262.20–566.43
Cognitive Measures
Flanker Task (RT in seconds)	710.78 (207.00)	227.40–1184.63
Letter Series (proportion correct)	.59 (.29)	.06–1.00
N-Back (2-back; number correct)	83.30 (19.11)	16.00–100.00
SDMT (number correct)	28.32 (11.36)	1.00–56.00
SRT (RT in seconds)	344.87 (121.21)	182.43–673.74

Note. Dx = diagnosis; MMSE = Mini-Mental State Examination; STAI-Y = State-Trait Anxiety Subscale Form Y; TST = total sleep time; SDMT = Symbol Digit Modality Test; SRT = Simple Reaction Time