These scales have been shown to have acceptable validity and reliability for use with the age group in this study (5 years and older; von Baeyer et al., 2009; Tomlinson, von Baeyer, Stinson, & Sung, 2010). All 10 children had at least two pain assess- ments recorded during the first 48–72 hr postopera- tively. Of the 17 nurses in the study, 2 were not observed assessing children’s pain, nor did they document any pain scores. Pain assessments took place most often in the immediate postoperative period. Seventy-five percent of the 75 pain assess- ments recorded were within the first 24 hr after surgery. The regularity of pain assessments decreased as the time since surgery increased: