The Psychometric Properties of the FLACC Scale Used to Assess Procedural Pain

Abstract

The Face, Legs, Activity, Cry, and Consolability (FLACC) scale is one of the most commonly and widely used behavioral observation pain scales. The aim of this study was to test the psychometric and practical properties of the FLACC scale to quantify procedural pain in infants and young children. Twenty-six clinicians independently applied the FLACC scale to segments of video collected from 100 children aged 6 to 42 months undergoing a procedure. Video segments were scored by 4 reviewers. Inter- and intrarater reliability coefficients were high (.92 and.87, respectively). Linear mixed modeling confirmed scale responsiveness (differences in difference between FLACC scores across phases for pai..