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Long-Term Risk for Mood and Anxiety Disorders After Pediatric Traumatic Brain Injury: A Population-Based, Birth
Dmitry Esterov1, Julie Witkowski, Dana M McCall
1Department of Physical Medicine and Rehabilitation (Drs Esterov and Brown), Division of Clinical Trials and Biostatistics (Ms Weaver), Mayo Clinic, Rochester, Minnesota; and Mayo Clinic School of Graduate Medical Education, Mayo Clinic College of Medicine and Science, Rochester, Minnesota (Drs Witkowski and McCall). Dr Witkowski is now with the Department of Physical Medicine and Rehabilitation, Northwestern Medicine, Wheaton, Illinois. Dr McCall is now with the Gundersen Health System, La Crosse, Wisconsin.
Objective:
To determine whether exposure to traumatic brain injury (TBI) before 10 years of age is associated with development of a mood or anxiety disorder by 25 years of age, and whether sex or injury severity influences this risk.
Setting:
Olmsted County, Minnesota.
Participants:
A total of 5518 persons born from January 1, 1976, through December 31, 1982.
Design:
Population-based, birth cohort study. Children sustaining TBI before 10 years of age (index date) were confirmed by manual record review and classified by injury severity using the Mayo Classification System. Each TBI case was age- and sex-matched to 2 referents from the same birth cohort without a history of TBI at the index date. Cox proportional hazards models were fit to compare the risk of a subsequent clinically diagnosed mood or anxiety disorder by 25 years of age between TBI cases and referents. Separate analysis was performed stratified by sex and injury severity.
Main Measures:
Incidence of mood and anxiety disorders determined through clinical diagnostic codes and manual record review.
Results:
The study included 562 children (238 females [42.3%] and 324 males [57.7%]) with TBI before 10 years of age (mean [SD] age at TBI: 4.7 [2.8] years). At least 1 mood or anxiety disorder was diagnosed for 115 persons with TBI and 215 referents. No statistically significant association existed between childhood TBI status and anxiety disorder (adjusted hazard ratio [aHR], 1.01 [95% confidence interval (CI), 0.71-1.43]; P = .97) or mood disorder (aHR, 1.16 [95% CI, 0.92-1.47]; P = .21). However, females who sustained TBI had a significantly increased risk of a subsequently diagnosed mood disorder compared with age-matched female referents (aHR, 1.40 [95% CI, 1.04-1.89]; P = .03).
Conclusions:
This study suggests that isolated TBI before 10 years of age is not significantly associated with an increased risk of anxiety or mood disorder by 25 years of age, though females may be at an increased risk.
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