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 κ = 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.