期刊
JOURNAL OF CLINICAL SLEEP MEDICINE
卷 9, 期 3, 页码 217-225出版社
AMER ACAD SLEEP MEDICINE
DOI: 10.5664/jcsm.2482
关键词
Actigraphy; sleep; insomnia; aging; sleep initiation and maintenance disorders
资金
- National Institutes of Health (NIH) [AT002108, T32 NR07039-18]
- National Institutes of Health (NIH) (Center for Research on the Management of Sleep Disturbance) [NR 011400]
- National Institutes of Health (NIH) (Center for Women's Health and Gender Research) [NR04011]
- NATIONAL CENTER FOR COMPLEMENTARY &ALTERNATIVE MEDICINE [R21AT002108] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF NURSING RESEARCH [T32NR007039, P30NR011400] Funding Source: NIH RePORTER
Study Objectives: The objective of this secondary analysis was to evaluate concurrent validity of actigraphy and polysomnography (PSG) in older women with insomnia. Methods: Concurrent validity of actigraphy and PSG was examined through (1) comparison of sleep outcomes from each recording method; (2) calculation of sensitivity, specificity, accuracy, and predictive values from epoch-by-epoch data; and (3) statistical and graphical exploration of the relationship between sleep disturbance severity and concordance of actigraphy and PSG. Subjects were 16 community-dwelling older women (mean age 69.4 +/- 8.1) with insomnia who underwent 8 nights of concurrent actigraphy and PSG. Results: Sleep efficiency reflected much greater sleep disturbance on PSG (66.9%) than actigraphy (84.4%). Based on generalized linear models, the parameter estimates for agreement between actigraphy and PSG were statistically significant (p < 0.05) for total sleep time and sleep latency, verged on significance for WASO (p = 0.052), but was not significant for sleep efficiency (p = 0.20). Epoch-by-epoch analysis showed high sensitivity (96.1%), low specificity (36.4%), and modest values on agreement (75.4%) and predictive values of sleep (74.7%) and wake (80.2%). Generalized linear models showed that overall accuracy of actigraphy declined as sleep efficiency declined (unstandardized Beta = 0.741, p < 0.001). Based on this model, sleep efficiency of 73% was the point at which accuracy declined below an acceptable accuracy value of 80%. Conclusions: Actigraphy offers a relatively inexpensive and unobtrusive method for measuring sleep, but it appears to underestimate sleep disturbance, particularly at sleep efficiency levels below 73%, in older women with insomnia.
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