. Author manuscript; available in PMC: 2020 Aug 1.

Published in final edited form as: J Sleep Res. 2018 Dec 13;28(4):e12810. doi: 10.1111/jsr.12810

Table 2.

Actigraphic sleep determinants of cognitive performance in patients with an Implantable Cardiac Defibrillators (ICD) (n=41)

Cognitive Domain/Measure	B	SE	t	p
*Attention/Processing Speed*
SDMT^a
TST	.05	.02	2.37	.02
Age	−.42	.14	−2.91	.01
TST x age	−.00	.00	−.85	.40
Anxiety score	−.11	.13	−.82	.42
SRT^a
TST	−.29	.24	−.1.17	.25
Age	2.85	1.57	1.81	.08
TST x age	.01	.03	.28	.78
Anxiety score	−2.79	1.46	−1.91	.07
*Executive Functioning*
N-Back (2-back)^a
TST	.10	.04	2.53	.02
Age	−.08	.26	−.33	.74
TST x age	−.01	.00	−1.44	.16
Anxiety score	.03	.24	.14	.89
Letter Series^a
TST	.00	.00	2.19	.04
Age	−.00	.00	−1.10	.28
TST x age	−.00	.00	−.63	.53
Anxiety score	.00	.00	.34	.74
Flanker Task^a
TST	−.38	.40	−.96	.34
Age	8.81	2.56	3.43	<.01
TST x age	−.02	.05	−.35	.73
Anxiety score	−.87	2.39	−.36	.72

Note. SE = Standard error; Flanker Task = Mean reaction time on incongruent trials;

TST = total sleep time; Anxiety score = Score on the STAI-Y; SDMT = Symbol Digit Modality Test;

SRT = Simple Reaction time.

Regression analyses were also conducted with participants who met sleep apnea criteria (AHI > 5, n = 5) removed. Results remained similar across all cognitive tasks, therefore these participants were retained in in the study sample.