Pain Assessment in Children Younger Than 8 Years in Out-of-Hospital Emergency Medicine: Reliability and Validity of EVENDOL Score.

Objective Pain in children is underestimated and undertreated in out-of-hospital emergency medicine. In this setting, caregivers need a reliable pain scale, but none has been validated. A single observational pain scale for all children younger than 8 years, EVENDOL, has been validated in emergency pediatric units. We study the feasibility of EVENDOL score in an out-of-hospital emergency setting. Methods This prospective multicenter study included all conscious children younger than 8 years transported by a mobile intensive care unit between October 2008 and May 2010. The emergency physician and nurse independently assessed the child's pain using first a numeric rating scale (score 0-10), then the 5-item EVENDOL scale (verbal/vocal expression, facial expression, movements, postures, and relationship with entourage) (score 0-3/item) at 3 time points (at rest, during examination, and after analgesia). We studied the scale's internal validity, interrater reliability, discriminant ability (influence of fever and anxiety), and face validity. Results Of the 422 included children, 82 and 62 (29%-39%) were in pain according to the emergency physician and nurses (numeric rating scale >3/10). All EVENDOL scale attributes were satisfied at all 3 time points, for all population subsets. Values for the first assessment (entire study population) were as follows: internal validity (0.78-0.89), interrater reliability (r = 0.63-0.76, weighted kappa = 0.49-0.65), construct validity, and discriminant ability (r = 0.6-0.7). Fever did not impact on EVENDOL score. Anxiety level and pain were correlated. Completion time was fast (mean, 2.3-3.4 minutes). Face validity was good. Conclusion EVENDOL is a quick, easy-to-use, discriminant instrument to assess pain in young children in out-of-hospital emergency settings.