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Attention-Deficit/Hyperactivity Disorder Is Associated With Increased Rates of Childhood Infectious Diseases: A
Eugene Merzon1, Ariel Israel2, Shai Ashkenazi3
1Leumit Health Services, Tel-Aviv, Israel; School of Medicine, Ariel University, Ariel, Israel.
Insights
Children with attention-deficit/hyperactivity disorder (ADHD) have a higher likelihood of experiencing infectious diseases (IDs). Healthcare providers should consider this association in pediatric care.
Area of Science:
- Pediatric Health
- Epidemiology
- Infectious Diseases
Background:
- Infectious diseases (IDs) represent a significant health burden in children.
- Previous studies indicate a link between pediatric attention-deficit/hyperactivity disorder (ADHD) and specific infectious diseases.
Purpose of the Study:
- To investigate the association between pediatric ADHD and the overall incidence of infectious diseases.
- To determine if ADHD increases the risk for various pediatric infections.
Main Methods:
- A population-based case-control study utilized Electronic Medical Records (EMRs) from Leumit Health Services (LHS).
- The study included children and adolescents aged 5-18 years from January 1, 2006, to June 30, 2021.
- Cases met ADHD criteria; controls were randomly selected (2:1 ratio) and matched by demographics. Diagnoses used ICD-9/10 criteria.
Main Results:
- The study included 18,756 ADHD cases and 37,512 controls, with similar demographics.
- Children with ADHD showed significantly higher rates of all infectious diseases compared to controls.
- Specific infections with increased risk included acute respiratory infection (OR=1.4), acute gastroenteritis (OR=1.3), salmonellosis (OR=2.8), and urinary tract infection (OR=1.3).
- Children with ADHD received anti-infective medications more frequently and had more physician visits.
Conclusions:
- Findings suggest a significant association between infectious diseases and pediatric ADHD.
- Healthcare providers should be aware of the increased risk of infections in children with ADHD.
Objective:
Infectious diseases (IDs) pose a heavy burden on children. An association between pediatric attention-deficit/hyperactivity disorder (ADHD) and specific IDs has been documented. Our objective was to test the possibility that ADHD is associated with increased likelihood for pediatric IDs at large.
Method:
A population-based case-control study was conducted using Electronic Medical Records (EMRs) of a national Health Maintenance Organization, Leumit Health Services (LHS). ICD-9/10 criteria were used for all diagnoses. The study population consisted of all children and adolescents (aged 5-18 years), members of LHS between January 1, 2006-June 30, 2021. Case patients met International Classification of Diseases (ICD-9/10) criteria for ADHD. Controls included randomly selected persons without ADHD (2:1 ratio), matched individually by demographic indices. The EMRs retrieved 3 exposure categories: pediatric ID, anti-infective medications use, and number of physician visits. The study was approved by the review board of Shamir Medical Center and the Research Committee of LHS.
Results:
Cases patients comprised 18,756 participants, with a mean age of 8.3 ± 2.6 years and a male/female ratio of 63%:37%. Matched controls comprised 37,512 participants, with a mean age of 8.3 ± 2.6 years and a male/female ratio of 63%:37%. Demographic variables were similar between the groups. The rates of all IDs were significantly higher in participants with ADHD than in controls and were not restricted to a single body system, including acute respiratory infection (OR = 1.4, 95% CI = 1.3-1.4, p < .001), acute gastroenteritis (OR = 1.3,95% CI 1.3-1.4, p < .001), salmonellosis (OR = 2.8, 95% CI = 2.3-3.5, p < .001), and urinary tract infection (OR = 1.3, 95% CI = 1.2-1.4, p < .001). All anti-infective agents were prescribed significantly more often to children with ADHD. There were significantly higher rates of physician visits for participants with ADHD.
Conclusion:
Study findings suggest an association between ID and pediatric ADHD Health care providers should be aware of this potential association.
Clinical Trial Registration Information:
The Health and Economic Impact of Treated and Untreated ADHD; https://www.shamir.org/; 005-18-LEU.
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