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Validation of Actiwatch for Assessment of Sleep-wake States in Preterm Infants
Shu-Chen Yang,Asphodel Yang,Ying-Ju Chang 한국간호과학회 2014 Asian Nursing Research Vol.8 No.3
Purpose: The purpose of this study was to validate the Actiwatch with behaviorally determined sleepewake state in preterm infants and to explore the influence of postmenstrual age on the accuracy ofActiwatch. Methods: A prospective and comparative research design was used. Twenty-four preterm infants withpostmenstrual age ranging from 28e38 weeks were studied. The infants were studied for 2 hours betweentwo feedings. Infant's sleep and wake state was measured every 30 seconds using Actiwatch andthe Anderson Behavioral State Scale simultaneously. Results: Actiwatch demonstrated high agreement, sensitivity, and predictivity of sleep state, whenvalidated with the Anderson Behavioral State Scale at the setting of high and automatic activitythresholds, and was not influenced by the infant's postmenstrual age. However, lower specificity andpredictivity were found in the wake state, and influenced by postmenstrual age. Conclusion: Results of this study suggest that high activity thresholds are the most accurate for determiningsleep state in preterm infants, and health care professionals must take the limitations intoconsideration while using the Actiwatch to assess wake states.