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 .
The analgesic efficacy of an injectable prodrug of acetaminophen in children after orthopaedic surgery.
The analgesic efficacy and safety of propacetamol , an injectable prodrug of acetaminophen , ( paracetamol ) were studied in 87 children ( 36 boys , 51 girls ; age 6 - 13 ; mean age 9.5 years ) immediately after limb surgery . Using a double-blind , r and omized , parallel group design , the effects of a single IV infusion of 30 mg.kg-1 propacetamol ( i.e. 15 mg.kg-1 acetaminophen ) were compared with a single injection of placebo ( PL ) . Efficacy was assessed on pain scores rated on a four-point verbal scale , a five-point visual scale ( faces ) and on a four-point relief verbal scale before administration ( T0 ) and 0.25 , 0.5 , 1 , 2 , 3 , 4 , 5 , 6 h after administration . At the end the global efficacy was rated by the physician on a five-point verbal scale . Propacetamol was statistically superior to placebo on all assessment criteria . Seven side-effects were recorded : five in the propacetamol group and two in the placebo group . 30 mg.kg-1 propacetamol provided a significantly greater analgesic effect than placebo in children after orthopaedic surgery
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 .