All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .
An Evaluation of the Efficacy and Tolerability of Oral Tramadol Hydrochloride Tablets for the Treatment of Postsurgical Pain in Children
In this double-blinded , r and omized , multicenter study , we examined analgesic efficacy and tolerability of tramadol in postoperative pediatric patients . Eighty-one postsurgical ASA physical status I and II patients ages 7–16 yr received oral tramadol ( approximately 1 or 2 mg/kg ) for postoperative analgesia when they were ready to transition from morphine patient-controlled analgesia to oral analgesics . Rescue analgesia consisted of morphine patient-controlled analgesia or an oral equivalent dose of oxycodone . Patients rated their pain just before the administration of tramadol and at regular intervals for 8 h afterwards using the Wong-Baker Faces Pain Rating Scale . The 2-mg/kg group required approximately half as much rescue analgesia as the 1-mg/kg group ( P = 0.006 ) . Parents rated the larger dose more favorably . Adverse events were generally mild to moderate in severity ( vomiting [ 10 % ] , nausea [ 9 % ] , pruritus [ 7 % ] , rash [ 4 % ] ) and similar between the two treatment groups . There were no significant changes in hemodynamic variables , respiratory rate , or Spo2 percentages between the two treatment groups or in all patients compared with pretreatment values
All 4 faces pain scales were found to be adequately supported by psychometric data .
When given a choice between faces scales , children preferred the WBFPRS .
Confounding of pain intensity with affect caused by use of smiling and crying anchor faces is a disadvantage of the WBFPRS .
: For clinical use , we found no grounds to switch from 1 faces scale to another when 1 of the scales is in use .
CONTEXT : Numerous faces scales have been developed for the measurement of  pain intensity in children .
It remains unclear whether any one of the faces scales is better for a particular purpose with regard to validity , reliability , feasibility , and preference .
OBJECTIVES : To summarize and systematic ally review faces pain scales most commonly used to obtain self-report of pain intensity in children for evaluation of reliability and validity and to compare the scales for preference and utility .