Attention-Deficit/Hyperactivity Disorder and Outcome from Concussion: Examining Duration of Active Rehabilitation and Clinical Recovery

Abstract

Aims The objective of this study was to compare recovery time and duration of active rehabilitation following concussion between adolescents with and without attention-deficit/hyperactivity disorder (ADHD). Methods A retrospective cohort study was conducted among adolescents presenting to a specialty concussion clinic. One-quarter of the eligible episodes of care were selected. The final sample included 540 adolescents (ages 13–17 years, median age 15 years; 49.8% girls), of which 65 (12.0%) had a pre-injury diagnosis of ADHD. Days to recovery and days of active rehabilitation were examined. Results ADHD was not associated with recovery time (ADHD: median = 49 days, IQR = 25–77; No ADHD: median = 47 days, IQR = 29–85) in univariate (Z = −0.45; p = 0.65) or multivariable analyses (Hazard Ratio: 1.17 (0.85–1.61); χ2(1) = 0.95; p = 0.33). The duration of active rehabilitation services received did not differ between youth with ADHD (median = 38.5 days, IQR = 27.5–54.5) and without ADHD (median = 37.5 days, IQR = 18.5–66) in univariate (Z = −0.19; p = 0.85) or multivariable analyses (Hazard Ratio: 1.04 (0.67–1.63); χ2(1) = 0.03; p = 0.85). Conclusions Our findings support accumulating evidence that ADHD, in and of itself, is not a risk factor for longer recovery or worse outcomes following pediatric concussion.