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Ware AL, McLarnon MJW, Lapointe AP, Brooks BL, Bacevice A, Bangert BA, Beauchamp MH, Bigler ED, Bjornson B, Cohen DM, Craig W, Doan Q, Freedman SB, Goodyear BG, Gravel J, Mihalov HLK, Minich NM, Taylor HG, Zemek R, Yeates KO. IQ After Pediatric Concussion. Pediatrics 2023:e2022060515. [PMID: 37455662 PMCID: PMC10389777 DOI: 10.1542/peds.2022-060515] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/30/2023] [Indexed: 07/18/2023] Open
Abstract
OBJECTIVES This study investigated IQ scores in pediatric concussion (ie, mild traumatic brain injury) versus orthopedic injury. METHODS Children (N = 866; aged 8-16.99 years) were recruited for 2 prospective cohort studies from emergency departments at children's hospitals (2 sites in the United States and 5 in Canada) ≤48 hours after sustaining a concussion or orthopedic injury. They completed IQ and performance validity testing postacutely (3-18 days postinjury; United States) or 3 months postinjury (Canada). Group differences in IQ scores were examined using 3 complementary statistical approaches (linear modeling, Bayesian, and multigroup factor analysis) in children performing above cutoffs on validity testing. RESULTS Linear models showed small group differences in full-scale IQ (d [95% confidence interval] = 0.13 [0.00-0.26]) and matrix reasoning (0.16 [0.03-0.30]), but not in vocabulary scores. IQ scores were not related to previous concussion, acute clinical features, injury mechanism, a validated clinical risk score, pre- or postinjury symptom ratings, litigation, or symptomatic status at 1 month postinjury. Bayesian models provided moderate to very strong evidence against group differences in IQ scores (Bayes factor 0.02-0.23). Multigroup factor analysis further demonstrated strict measurement invariance, indicating group equivalence in factor structure of the IQ test and latent variable means. CONCLUSIONS Across multisite, prospective study cohorts, 3 complementary statistical models provided no evidence of clinically meaningful differences in IQ scores after pediatric concussion. Instead, overall results provided strong evidence against reduced intelligence in the first few weeks to months after pediatric concussion.
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Affiliation(s)
- Ashley L Ware
- Department of Psychology, Georgia State University, Atlanta, Georgia
- Department of Neurology, University of Utah, Salt Lake City, Utah
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Matthew J W McLarnon
- Department of General Management and Human Resources, Bissett School of Business, Mount Royal University, Calgary, Alberta, Canada
| | - Andrew P Lapointe
- Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Brian L Brooks
- Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Neurosciences Program, Alberta Children's Hospital, Departments of Pediatrics, Clinical Neurosciences, and Psychology, University of Calgary, Calgary, Alberta, Canada
| | - Ann Bacevice
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Barbara A Bangert
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
| | - Miriam H Beauchamp
- Department of Psychology, University of Montreal and CHU Sainte-Justine Hospital Research Center, Montréal, Québec, Canada
| | - Erin D Bigler
- Department of Neurology, University of Utah, Salt Lake City, Utah
- Department of Psychology, Brigham Young University, Provo, Utah
| | - Bruce Bjornson
- Division of Neurology
- Department of Pediatrics, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Daniel M Cohen
- Abigail Wexner Research Institute at Nationwide Children's Hospital, and Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - William Craig
- University of Alberta and Stollery Children's Hospital, Edmonton, Alberta, Canada
| | - Quynh Doan
- Department of Pediatrics, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, British Columbia, Canada
| | - Stephen B Freedman
- Departments of Pediatrics and Emergency Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Bradley G Goodyear
- Department of Radiology, University of Calgary, Calgary, Alberta, Canada
| | - Jocelyn Gravel
- Department of Pediatric Emergency Medicine; CHU Sainte-Justine, Department of Pediatrics, University of Montréal, Montréal, Québec, Canada
| | - H Leslie K Mihalov
- Abigail Wexner Research Institute at Nationwide Children's Hospital, and Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Nori Mercuri Minich
- Department of Pediatrics, Case Western Reserve University, Cleveland, Ohio
- Rainbow Babies & Children's Hospital, University Hospitals Cleveland Medical Center, Cleveland, Ohio; and
| | - H Gerry Taylor
- Abigail Wexner Research Institute at Nationwide Children's Hospital, and Department of Pediatrics, The Ohio State University, Columbus, Ohio
| | - Roger Zemek
- Departments of Pediatrics and Emergency Medicine, University of Ottawa, Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - Keith Owen Yeates
- Department of Psychology, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute and Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
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