Publications by authors named "Christakis D"

The COVID-19 pandemic has been associated with increased neuropsychiatric conditions in children and youths, with evidence suggesting that SARS-CoV-2 infection may contribute additional risks beyond pandemic stressors. This study aimed to assess the full spectrum of neuropsychiatric conditions in COVID-19 positive children (ages 5-12) and youths (ages 12-20) compared to a matched COVID-19 negative cohort, accounting for factors influencing infection risk. Using EHR data from 25 institutions in the RECOVER program, we conducted a retrospective analysis of 326,074 COVID-19 positive and 887,314 negative participants matched for risk factors and stratified by age.

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Objective: To compare the prevalence of neurodevelopmental and mental health diagnoses in a national sample of youth with sex chromosome trisomies (SCTs) with matched controls.

Methods: Patients in PEDSnet and a diagnosis code mapping to 47,XXY/Klinefelter syndrome (n = 1171), 47,XYY/Double Y syndrome (n = 243), or 47,XXX/Trisomy X syndrome (n = 262) were matched with controls using propensity scores. Generalized estimating equations computed odds ratios (OR) with 95% confidence intervals (CI) for the prevalence of diagnoses within the neurodevelopmental and mental health composites, psychotropic medication prescriptions, and encounters with behavioral health and therapy providers.

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Background: The impact of pre-infection vaccination on the risk of long COVID remains unclear in the pediatric population. We aim to assess the effectiveness of BNT162b2 on long COVID risks with various strains of the SARS-CoV-2 virus in children and adolescents, using comparative effectiveness methods. We further explore if such pre-infection vaccination can mitigate the risk of long COVID beyond its established protective benefits against SARS-CoV-2 infection using causal mediation analysis.

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Pediatric Long COVID has been associated with a wide variety of symptoms, conditions, and organ systems, but distinct clinical presentations, or subphenotypes, are still being elucidated. In this exploratory analysis, we identified a cohort of pediatric (age <21) patients with evidence of Long COVID and no pre-existing complex chronic conditions using electronic health record data from 38 institutions and used an unsupervised machine learning-based approach to identify subphenotypes. Our method, an extension of the Phe2Vec algorithm, uses tens of thousands of clinical concepts from multiple domains to represent patients' clinical histories to then identify groups of patients with similar presentations.

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Article Synopsis
  • Croup and bronchiolitis are common reasons for kids to be hospitalized, but the impact of COVID-19 (SARS-CoV-2) on hospitalization rates is unclear.
  • This study analyzed health records from children with and without COVID-19 to see how their hospital experiences differed during the pandemic across different virus variant periods.
  • The findings revealed that while a small percentage of patients with croup and bronchiolitis tested positive for COVID-19, there were no significant differences in hospital utilization outcomes for those with and without the virus, suggesting minimal impact on healthcare resource use.
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Objectives: This study seeks to identify demographic and clinical factors prompting clinician prescribing of nirmatrelvir/ritonavir to pediatric patients for management of coronavirus disease 2019 (COVID-19) infection.

Methods: Patients aged 12 to 17 years with a COVID-19 infection and nirmatrelvir/ritonavir prescription during an outpatient clinical encounter within a PEDSnet-affiliated institution between January 2022 and August 2023 were identified using electronic health record data. A multivariate logistic regression analysis was used to estimate odds of nirmatrelvir/ritonavir prescription after adjusting for various factors.

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Purpose: To understand if and why guardians access their adolescent child's electronic health record patient portal account.

Methods: Guardians of transgender and gender-diverse adolescents completed a survey regarding patient portal use. Descriptive statistics were used to describe items related to guardian access to adolescent portal accounts.

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Importance: With personalized touch-screen tablets, young children can choose content and engage in play-like activities. However, tablets may also reduce shared engagement as the action of viewing or touching the screen is often not visible to nearby adults. This may impact communicative gazing and pointing, which is critical to the formation of shared awareness and in turn supports language development.

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We investigated the risks of post-acute and chronic adverse kidney outcomes of SARS-CoV-2 infection in the pediatric population via a retrospective cohort study using data from the RECOVER program. We included 1,864,637 children and adolescents under 21 from 19 children's hospitals and health institutions in the US with at least six months of follow-up time between March 2020 and May 2023. We divided the patients into three strata: patients with pre-existing chronic kidney disease (CKD), patients with acute kidney injury (AKI) during the acute phase (within 28 days) of SARS-CoV-2 infection, and patients without pre-existing CKD or AKI.

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Article Synopsis
  • The study assesses a new algorithm for identifying Long COVID in pediatric patients, aiming to standardize how this condition is defined and recognized in the medical community.
  • Using data from 31,781 patients, the algorithm showed moderate accuracy when compared to traditional chart reviews, with an overlap rate of 62%, but also noted significant disagreement on cases.
  • The findings suggest that discrepancies may stem from varying interpretations of Long COVID symptoms, emphasizing the need for a clearer clinical definition to improve identification and support research efforts.
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Importance: The profile of gastrointestinal (GI) outcomes that may affect children in post-acute and chronic phases of COVID-19 remains unclear.

Objective: To investigate the risks of GI symptoms and disorders during the post-acute phase (28 days to 179 days after SARS-CoV-2 infection) and the chronic phase (180 days to 729 days after SARS-CoV-2 infection) in the pediatric population.

Design: We used a retrospective cohort design from March 2020 to Sept 2023.

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Article Synopsis
  • A group of experts met online to decide if using screens, especially before bed, is bad for sleep in kids, teens, and adults.
  • They looked at lots of studies and found that screens do hurt sleep, particularly for children and teenagers.
  • They agreed that certain behaviors and strategies can help lessen the negative effects of screen time on sleep.
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We aimed to understand transgender and nonbinary (TNB) young adults' desire to receive gender-affirming medical care (GAMC) before age 18 and identify barriers and facilitators to receiving this care in adolescence. A cross-sectional survey was administered to TNB young adults presenting for care between ages 18 and 20 in 2023. Descriptive statistics characterized the sample, χ tests with pairwise comparisons identified differences in desire for gender-affirming medications, outness, and parental consent by gender identity and sex assigned at birth, and -tests evaluated differences in barriers and facilitators to receiving care by outness to parents.

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Background: The risk of cardiovascular outcomes in the post-acute phase of SARS-CoV-2 infection has been quantified among adults and children. This paper aimed to assess a multitude of cardiac signs, symptoms, and conditions, as well as focused on patients with and without congenital heart defects (CHDs), to provide a more comprehensive assessment of the post-acute cardiovascular outcomes among children and adolescents after COVID-19.

Methods: This retrospective cohort study used data from the RECOVER consortium comprising 19 US children's hospitals and health institutions between March 2020 and September 2023.

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Objectives: To identify and examine demographic variation in estimates of gender-diverse youth (GDY) populations from the PEDSnet learning health system network and the Youth Risk Behavior Survey (YRBS).

Methods: The PEDSnet sample included 14- to 17-years-old patients who had ≥2 encounters at a member institution before March 2022, with at least 1 encounter in the previous 18 months. The YRBS sample included pooled data from 14- to 17-year-old in-school youth from the 2017, 2019, and 2021 survey years.

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Telemedicine may help improve access to gender-affirming care for transgender and gender diverse (TGD) adolescents. Parents or guardians (i.e.

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Objective: Assess how child involvement in making rules about screen time relates to age, child prosocial functioning, and amount of screen use.

Methods: NORC's AmeriSpeak Panel was used to recruit a nationally representative sample of parents or guardians of school-aged children (age 5-17) in the United States (n = 2084). Parents completed survey that included measures of screen time, child involvement in rule making about screen use, family functioning, and dimensions of child psychosocial functioning.

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Article Synopsis
  • - The review highlights the growing impact of digital technologies on youth development and mental health, specifically examining how screen use may affect brain development and behavior.
  • - A group of international experts identified gaps in current knowledge about the relationship between screen media and neurodevelopment, stressing the need for further research in understanding these effects from infancy to adolescence.
  • - The authors suggest that applying transdiagnostic frameworks could enhance future research and that translating findings into effective policies can support healthier youth development in our digital age.
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  • The study developed two new algorithms (ODACoR) to analyze clinical data from children's hospitals, focusing on the risk factors affecting post-acute sequelae of SARS-COV-2 (PASC) in kids and teens.
  • By utilizing EHR data from over 6.5 million pediatric patients, the algorithms were shown to be efficient and accurate in identifying key risk factors, outperforming traditional meta-analysis methods.
  • The ODACoR algorithms demonstrated lower bias and higher reliability compared to other estimation methods, making them ideal for studying complex clinical interactions.
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  • The study evaluates the BNT162b2 vaccine's effectiveness in preventing COVID-19 infection and severe illness in children and adolescents, focusing on the Delta and Omicron variants.
  • It involved analyzing data from over 77,000 adolescents during the Delta phase and 167,000 children and adolescents during the Omicron phase, comparing vaccinated individuals to those unvaccinated.
  • Results showed the vaccine was extremely effective (98.4%) during the Delta period, while the effectiveness during the Omicron period dropped to around 74.3%, with no significant impact on cardiac complications among vaccinated individuals.
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