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Establishment and Implementation of Standardized Sleep Laboratory Data Collection and Scoring Procedures
Author(s) -
Karacan Ismet,
Orr William C.,
Roth Thomas,
Kramer Milton,
Shurley Jay T.,
Thornby John I.,
Bingham Stephen F.,
Salis Patricia J.
Publication year - 1978
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/j.1469-8986.1978.tb01358.x
Subject(s) - stage (stratigraphy) , psychology , sleep (system call) , standardization , sleep stages , electroencephalography , audiology , polysomnography , medicine , psychiatry , computer science , paleontology , biology , operating system
To standardize data collection and processing procedures, three Veterans Administration sleep laboratories established standard procedures “on paper,” implemented them in a study, and assessed scoring agreement for sleep EEG‐EOG recordings. The first phase of the study resulted in a detailed written description of all basic procedures. For the second, each laboratory evaluated 6 mentally and physically healthy males on three consecutive nights. Overall scoring agreement was about 90%. It was at least 89% between pairs of laboratories for stage 0, 59% for stage 1, 95% for stage 1 REM, 92% for stage 2, and 80% for stages 3+4. Values for standard sleep EEG‐EOG parameters were generally similar among scoring laboratories, and interlaboratory scoring agreement compared favorably with one measure of intralaboratory agreement. The low agreement for stage 1 is attributable to the infrequent and sporadic occurrence of stage 1 and is considered to be trivial. That for stages 3+4 is more critical and is probably related to the subjective process involved in scoring these stages. These data indicated that these techniques produced a high degree of interlaboratory standardization, and consequently, concurrence in sleep stage scoring.