“…Thus, future studies should control the confounding effects of types of surgery and pain medication on children's perioperative anxiety, negative behaviors, and postoperative pain. In addition, because of the fact that nonpharmacologic methods were also reported to be used to help relieve children's postoperative pain (He et al, 2007(He et al, , 2011 Among the six studies, two (Fincher et al, 2012;Kain et al, 1998) examined the effectiveness of therapeutic play intervention in parents' anxiety. Both studies found significant, positive effects on parents' anxiety before operation, as confirmed by both subjective and objective outcome measurements (Fincher et al, 2012;Kain et al, 1998).…”