Modification of the acute otitis media symptom severity scale

To modify a parent-reported scale we developed to follow symptoms of young children with acute otitis media (AOM-SOS) with the aim of improving its psychometric properties.We modified version 4.0 of the scale by increasing the number of response options from 3 to 6. We compared the distribution of scores, internal reliability, construct validity, and responsiveness of versions 4.0 and 5.0 in children diagnosed with acute otitis media (AOM) in 2...