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 .
Further validity testing of the Abu-Saad Paediatric Pain Assessment Tool.
This paper reports on the results of two studies conducted to further vali date the Abu-Saad Paediatric Pain Assessment Tool , a Dutch- language question naire developed to assess pain in school-age children . Children of 5 to 15 years of age reported in the first study their post-operative pain before and after the administration of analgesic medication using word descriptors of pain , the 10-cm scale , the Oucher , and a  visual analogue scale ( VAS ) . Lower mean pain scores at 4-hourly intervals post-analgesia supported the construct validity of the tool . Convergent validity was supported in both studies when scores on all concurrently administered measures positively correlated with the pain tool . In the second study , the correlations between pain and fear , a concurrently used measure with the pain instruments , were low , substantiating the discriminant validity of the pain tool . The significance of the results in relation to instrument development and multidimensional pain assessment in children are further discussed and elaborated
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 .