ClinicalTrials.gov Identifier: NCT00247624.
Actigraphy in insomnia
Comparison of actigraphy with polysomnography and sleep logs in depressed insomniacs
Article first published online: 29 MAR 2011
© 2011 European Sleep Research Society
Journal of Sleep Research
Volume 21, Issue 1, pages 122–127, February 2012
How to Cite
MCCALL, C. and MCCALL, W. V. (2012), Comparison of actigraphy with polysomnography and sleep logs in depressed insomniacs. Journal of Sleep Research, 21: 122–127. doi: 10.1111/j.1365-2869.2011.00917.x
- Issue published online: 20 JAN 2012
- Article first published online: 29 MAR 2011
- Accepted in revised form 26 February 2011; received 28 July 2010
- sleep logs
Actigraphy is increasingly used in the assessment and treatment of various clinical conditions, being a convenient and cost-effective method of capturing bodily movements over long periods of time. This study examined the use of actigraphy in the measurement of sleep of patients with depression and insomnia. Fifty-four patients diagnosed with a current major depressive episode and chronic insomnia underwent a baseline overnight study with concurrent actigraphic and polysomnography (PSG) monitoring, as well as subjective sleep diaries. Agreement between PSG, actigraphy and sleep diary measurements was evaluated using two-tailed t-tests, Pearson’s correlations and the Bland–Altman concordance technique. The only significant difference found between actigraphy and PSG was in latency to persistent sleep, in which actigraphy underestimated sleep latency relative to PSG (P < 0.05). There were moderate positive correlations between actigraphy and PSG for all variables. In contrast, significant differences were observed between sleep diaries and PSG for all sleep variables. Bland–Altman concordance diagrams also demonstrated that, while bias was limited between PSG and the other two measurement types, there were somewhat broad 95% limits of agreement for all sleep variables with both sleep diaries and actigraphy. In summary, actigraphic measurements of sleep more closely approximated those of PSG than did sleep diaries in this sample of depressed insomniacs.