EVALUATION OF THE ACTILLUME(R) WRIST ACTIGRAPHY MONITOR IN THE DETECTION OF SLEEPING AND WAKING

This study evaluated the Actillume(R) instrument and the modified Acti on 3 sleep-wake scoring algorithm, in which the scoring factor (P) was set at 0.10, 0.14, 0.20, 0.30, 0.30 and 0.50. Fifteen subjects, each of whom underwent polysomnography with simultaneous wrist actigraphy f our times, yielded a total of 60 sleep studies. The sleep data from ea ch subject were divided into four groups. In the high sleep efficiency index groups of the calibration and validation samples, the accuracy of the algorithm significantly differed within six P-values and was hi ghest at P = 0.14. In the low sleep efficiency index groups of both sa mples, however, there were no significant differences in the accuracy. Thus, these results indicate that P = 0.14 should be most appropriate for this actigraph and algorithm.