This retrospective cohort study used TriNetX, a global federated health research network containing over 150 million deidentified electronic medical records, to evaluate psychiatric outcomes after pediatric upper respiratory infection (URTI). The analysis focused on children aged 3–16 with a diagnosis of acute URTI (ICD-10 J00–J06) who had a Streptococcus pyogenes test result (positive or negative) within two weeks of the URTI diagnosis.
Before propensity matching, the study identified 464,513 children who tested positive for streptococcal infection and 1,023,171 children who tested negative. Propensity score matching was performed using 70 baseline variables to balance the groups. After matching, each cohort included 456,221 children. The matched cohorts were 48% female. The abstract does not provide additional demographic breakdowns, geographic distribution, testing modalities, or information on antibiotic treatment or other clinical management.
The main outcomes evaluated over a 1-year follow-up were incidence of any psychiatric disorder and specific diagnoses chosen a priori: obsessive-compulsive disorder (OCD), tic disorder, anxiety disorder, and restricted oral intake. The study positioned these outcomes in the context of longstanding clinical interest in post-streptococcal neuropsychiatric associations (for example, PANDAS and related immunopsychiatric hypotheses).
The matched analysis produced risk estimates comparing streptococcal-positive versus streptococcal-negative children at 1 year:
Any psychiatric disorder: relative risk (RR) 0.92, 95% confidence interval (CI) 0.90–0.94, indicating a reduced risk in the streptococcal-positive cohort.
Restricted oral intake: RR 0.81, 95% CI 0.77–0.86, lower risk in the streptococcal-positive cohort.
Anxiety disorder: RR 0.94, 95% CI 0.91–0.97, a modestly reduced risk in the streptococcal-positive cohort.
Obsessive-compulsive disorder (OCD): RR 0.98, 95% CI 0.86–1.12, no statistically significant difference between cohorts.
Tic disorder: RR 0.95, 95% CI 0.87–1.04, no statistically significant difference between cohorts.
These reported RRs and confidence intervals derive from the abstract's matched-cohort analysis; the abstract does not present absolute incidence rates, event counts after matching, time-to-event curves, or subgroup analyses in the provided text.
In this large-scale, propensity-matched electronic health-record analysis, the authors report no evidence that exposure to Streptococcus pyogenes in the setting of acute pediatric URTI is associated with an increased 1-year risk of the psychiatric outcomes measured, including OCD and tic disorder. Instead, the streptococcal-positive cohort had modestly lower risks of any psychiatric disorder, restricted oral intake, and anxiety disorder at 1 year.
The study addresses a research question that has clinical and historical importance in immunopsychiatry, given decades of interest in post-streptococcal neuropsychiatric sequelae (often discussed under terms such as PANDAS). The abstract frames the findings as contradicting an association between streptococcal URTI and increased risk for the prespecified psychiatric diagnoses in the examined sample.
The information provided here is limited to the abstract. The following important methodological and contextual details were not reported in the abstract text supplied and therefore cannot be asserted:
Because these items are not included in the provided source text, they were not inferred or added. The abstract’s conclusion is limited to the reported matched-cohort findings indicating no increase in the measured psychiatric outcomes following streptococcal URTI in this dataset.