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 .
Imagery reduces children's post-operative pain
& NA ; This un‐blinded experimental study investigated the effectiveness of imagery , in addition to routine analgesics , in reducing tonsillectomy and /or adenoidectomy pain and anxiety after ambulatory surgery ( AS ) and at home . Seventy‐three children , aged 7–12 , were recruited from five AS setting s. Thirty‐six children r and omly assigned to the treatment group  watched a professionally developed videotape on the use of imagery and then listened to a 30‐min audio tape of imagery approximately 1 week prior to surgery ( T1 ) . They listened to only the audio tape 1–4 h after surgery ( T2 ) , and 22–27 h after discharge from AS ( T3 ) . The 37 children in the attention‐control group received st and ard care . Pain and anxiety were measured at each time‐point in both groups . Measures of sensory pain were the Oucher and amount of analgesics used in AS and home ; affective pain was measured with the Facial Affective Scale ( FAS ) . Anxiety was measured using the State Trait Anxiety Inventory for Children ( STAIC ) . When controlling for trait anxiety and opioid and non‐opioid intake 1–4 h before the pain measures , MANCOVA showed significantly lower pain and anxiety in the treatment group at T2 , but not at T3 . When controlling for trait anxiety , a two‐way RM MANCOVA indicated no significant group differences in combined opioid and non‐opioid use between the groups , or between times . Appropriately trained health care providers should use imagery to reduce post‐operative pain following tonsillectomy and /or adenoidectomy in AS . Teaching parents about adequate home administration of analgesics may increase the effectiveness of imagery at home
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 .