THE ROLE OF RECURRENT OTITIS MEDIA IN COGNITIVE DEVELOPMENT DELAY: A LONGITUDINAL PEDIATRIC STUDY

Abstract

Otitis media is one of the most common pediatric infections and has been implicated in adverse developmental outcomes, yet few studies have quantified its long-term impact on cognitive trajectories. In this prospective cohort study, 300 infants (mean age 6 months at enrollment) were followed over 48 months to examine how the frequency, duration, and severity of recurrent otitis media influence neurocognitive development. Otitis media episodes were diagnosed by pediatric otolaryngologists and confirmed via tympanometry and audiometry at six-month intervals. Cognitive function was evaluated at 12, 24, 36, and 48 months using the Bayley Scales of Infant and Toddler Development, Third Edition, and at 48 months with the Wechsler Preschool and Primary Scale of Intelligence. Multilevel linear mixed-effects models adjusted for sex, socioeconomic status, parental education, and baseline development. Children experiencing three or more infection episodes exhibited progressively lower Bayley-III composite scores, declining from a mean of 95 ± 12 at 12 months to 88 ± 15 at 48 months, compared with gains from 100 ± 10 to 108 ± 12 among non-recurrence peers (p ≤ 0.01 at each timepoint). Each additional episode corresponded to a 1.5-point reduction in cognitive score (SE = 0.5; p = 0.002), and longer episode duration produced an independent −0.8-point effect (SE = 0.3; p = 0.01). At 48 months, full-scale IQ averaged 95 ± 12 in the recurrence group versus 110 ± 10 in the non-recurrence group. Nearly 30% of children with recurrent infections fell below the clinical threshold for cognitive delay (<85), compared with 10% of their counterparts. Executive function trajectories diverged significantly over time (p < 0.005), and cumulative hearing loss was negatively correlated with memory scores (r = –0.42; p < 0.001). Early tympanostomy tube placement was associated with a 15-point increase in mean cognitive score at 48 months.These findings establish a dose-dependent, deleterious effect of recurrent otitis media on early cognitive and executive function, highlighting the importance of prompt diagnosis, audiological monitoring, and timely medical or surgical intervention to protect neurodevelopmental outcomes.