Abstract
In the measurement of sleep stages categorization using the R-K Method, which is the internationally standardized method, it is quite difficult to obtain the same results from all the measurements made by different scorers due to the interventions of the scorers interpretations. If the results can be corrected to eliminate these interventions by referring to a model that shows the commonly observed properties in normal sleeps, the sleep stage measurement will be of more credibility. This paper proposes a model that applies the test subjects body movements to change the Transition Probability Matrix in the Sleep Stage Transition Equation. The model then will be used as a basis for making the measuring equipment, and the probable emergency rate of each sleep stage will be estimated by using the sleep stage measurement results as well as the sleep stages obtained through the R-K method as input values, and also by applying the Pneumatic Method that we have continuously been proposing. As a result, the probabilities of the top three possible sleep stages out of six that two scorers selected have been evaluated for their coincidence with the selections made by the pneumatic method, using the K statistics. In the comparison among the data used for making the Transition Probability Matrix, the K statistics result between the two scorers was0.95. The results between the scorers and the pneumatic method were0.79 (scorer1) and0.76 (scorer 2). The results were also found to be effective for the data that were not used for making the Transition Probability Matrix, with the respective value of 0.93, 0.73, and 0.75.
