Psychological predictors of postoperative sleep in children undergoing outpatient surgery

Background: The purpose of this study was to examine psychological predictors of postoperative sleep in children undergoing outpatient surgery. Methods: We used hierarchical multivariate regression to examine the impact of demographic and personality variables such as parental worry/anxiety [NEO-personality inventory, revised (NEO-PI-R) Neuroticism], parental coping style (Miller Behavioral Style Scale), children's aggressive behavior [child behavior checklist (CBCL) externalizing], and children's temperament (emotionality, activity, sociability, and impulsivity) on postoperative sleep in 52 consecutive, healthy, children undergoing outpatient surgery. Sleep was assessed using actigraphy, a valid, reliable and objective measure of sleep quality. All perioperative protocols were strictly controlled and standardized. Results: We found that 22% of the children experienced difficulty with postoperative sleep as defined by actigraphy. A hierarchical multiple regression model that was constructed to identify predictors of postoperative sleep efficiency in children accounted for 82% of the variance (R = 0.906, F = 19.42, P = 0.0001). Significant predictors in this model included preoperative sleep patterns (60%), postoperative pain (8.2%), parental anxiety/worry (NEO-PI-R Neuroticism scale; 9%), and children's aggressive behavior (CBCL externalizing; 5%). Conclusions: We conclude that psychological factors such as parental anxiety/worry and children's aggressive behavior are predictive of children's postoperative sleep above and beyond the influence of preoperative sleep patterns and postoperative pain.