Publications by authors named "Rainu Kaushal"

Objective: Studies show metformin use before and during SARS-CoV-2 infection reduces severe COVID-19 and postacute sequelae of SARS-CoV-2 (PASC) in adults. Our objective was to describe the incidence of PASC and possible associations with prevalent metformin use in adults with type 2 diabetes mellitus (T2DM).

Research Design And Methods: This is a retrospective cohort analysis using the National COVID Cohort Collaborative (N3C) and Patient-Centered Clinical Research Network (PCORnet) electronic health record (EHR) databases with an active comparator design that examined metformin-exposed individuals versus nonmetformin-exposed individuals who were taking other diabetes medications.

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Background: SARS-CoV-2-infected patients may develop new conditions in the period after the acute infection. These conditions, the post-acute sequelae of SARS-CoV-2 infection (PASC, or Long COVID), involve a diverse set of organ systems. Limited studies have investigated the predictability of Long COVID development and its associated risk factors.

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Paxlovid has been approved for use in patients who are at high risk for severe acute COVID-19 illness. Evidence regarding whether Paxlovid protects against Post-Acute Sequelae of SARS-CoV-2 infection (PASC), or Long COVID, is mixed in high-risk patients and lacking in low-risk patients. With a target trial emulation framework, we evaluated the association of Paxlovid treatment within 5 days of SARS-CoV-2 infection with incident Long COVID and hospitalization or death from any cause in the post-acute period (30-180 days after infection) using electronic health records from the Patient-Centered Clinical Research Networks (PCORnet) RECOVER repository.

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Article Synopsis
  • The study investigates how the characteristics and frequency of post-acute sequelae of SARS-CoV-2 infection (PASC) differ between those infected by the ancestral strain in 2020 and the Delta variant in 2021.
  • It analyzes a significant dataset of around 27 million patients across New York and Florida to assess new health conditions arising 31-180 days post COVID-19 infection.
  • Key findings reveal that during the ancestral strain period, issues like pulmonary fibrosis and dyspnea were prominent, while the Delta variant was mainly associated with an increased risk of pulmonary embolism.
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Background: Little is known about post-acute sequelae of SARS-CoV-2 infection (PASC) after acquiring SARS-CoV-2 infection during pregnancy. We aimed to evaluate the association between acquiring SARS-CoV-2 during pregnancy compared with acquiring SARS-CoV-2 outside of pregnancy and the development of PASC.

Methods: This retrospective cohort study from the Researching COVID to Enhance Recovery (RECOVER) Initiative Patient-Centred Clinical Research Network (PCORnet) used electronic health record (EHR) data from 19 U.

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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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Objective: To examine patient and provider perspectives on privacy and security considerations in telemedicine during the COVID-19 pandemic.

Study Design: Qualitative study with patients and providers from primary care practices in 3 National Patient-Centered Clinical Research Network sites in New York, New York; North Carolina; and Florida.

Methods: Semistructured interviews were conducted, audio recorded, transcribed verbatim, and coded using an inductive process.

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Background: An increasing number of studies have described new and persistent symptoms and conditions as potential post-acute sequelae of SARS-CoV-2 infection (PASC). However, it remains unclear whether certain symptoms or conditions occur more frequently among persons with SARS-CoV-2 infection compared with those never infected with SARS-CoV-2. We compared the occurrence of specific COVID-associated symptoms and conditions as potential PASC 31- to 150-day following a SARS-CoV-2 test among adults and children with positive and negative test results.

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Accelerated use of telemedicine during the COVID-19 pandemic enabled uninterrupted healthcare delivery while unmasking care disparities for several vulnerable communities. The social determinants of health (SDOH) serve as a critical model for understanding how the circumstances in which people are born, work, and live impact health outcomes. We performed semi-structured interviews to understand patients and providers' experiences with telemedicine encounters during the COVID-19 pandemic.

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Article Synopsis
  • During the COVID-19 pandemic, doctors quickly started using telemedicine, but we needed a better way to study and understand these programs.
  • We created a new survey to collect information about how telemedicine works in primary care by reviewing existing information and getting feedback from people involved.
  • The final survey has 32 questions and helps us understand the different telemedicine programs across the U.S., making it easier to compare them and see how they've grown over time.
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Article Synopsis
  • PCORnet is a National Research Network funded by PCORI that uses standardized electronic health records and patient input to facilitate pragmatic health research across 79 health system sites.
  • The network has evolved to include additional data sources such as commercial health plans and federal insurance claims, enhancing its ability to represent patient health and experiences more comprehensively.
  • With amendments allowing the inclusion of economic outcomes in research, PCORnet's phase 3, starting in January 2022, aims to bolster economic patient-centered outcomes through improved data linkages and stakeholder engagement.
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Objectives: To assess the impact of adding neighborhood social determinants of health (SDOH) data to demographic and clinical characteristics for predicting high-cost utilizers and to examine variations across age groups.

Study Design: Using US Census data and 2017-2018 commercial claims from a large national insurer, we estimated association between neighborhood-level SDOH and the probability of being a high-cost utilizer.

Methods: Observational study using administrative claims from a national insurer and US Census data.

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Strained hospital capacity is associated with adverse patient outcomes. Anecdotal evidence suggests that during the COVID-19 pandemic in the US, some hospitals experienced capacity constraints while others in the same market had surplus capacity, a phenomenon known as "load imbalance." Our study evaluated the prevalence of intensive care unit load imbalance and the characteristics of hospitals most likely to be over capacity while other nearby hospitals were under capacity.

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Purpose: To examine the impact of telemedicine use on precepting and teaching among preceptors and patients during the COVID-19 pandemic.

Method: The authors conducted a secondary analysis of a qualitative study focusing on providers' and patients' experiences with and attitudes toward telemedicine at 4 academic health centers. Teaching and precepting were emergent codes from the data and organized into themes.

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Purpose: The need to rapidly implement telemedicine in primary care during the coronavirus disease 2019 (COVID-19) pandemic was addressed differently by various practices. Using qualitative data from semistructured interviews with primary care practice leaders, we aimed to report commonly shared experiences and unique perspectives regarding telemedicine implementation and evolution/maturation since March 2020.

Methods: We administered a semistructured, 25-minute, virtual interview with 25 primary care practice leaders from 2 health systems in 2 states (New York and Florida) included in PCORnet, the Patient-Centered Outcomes Research Institute clinical research network.

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Recent studies have investigated post-acute sequelae of SARS-CoV-2 infection (PASC, or long COVID) using real-world patient data such as electronic health records (EHR). Prior studies have typically been conducted on patient cohorts with specific patient populations which makes their generalizability unclear. This study aims to characterize PASC using the EHR data warehouses from two large Patient-Centered Clinical Research Networks (PCORnet), INSIGHT and OneFlorida+, which include 11 million patients in New York City (NYC) area and 16.

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Background: The necessary suspension of nonacute services by healthcare systems early in the COVID-19 pandemic was predicted to cause delays in routine care in the United States, with potentially serious consequences for chronic disease management. However, limited work has examined provider or patient perspectives about care delays and their implications for care quality in future healthcare emergencies.

Objective: This study explores primary care provider (PCP) and patient experiences with healthcare delays during the COVID-19 pandemic.

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Background: Patients who were SARS-CoV-2 infected could suffer from newly incidental conditions in their post-acute infection period. These conditions, denoted as the post-acute sequelae of SARS-CoV-2 infection (PASC), are highly heterogeneous and involve a diverse set of organ systems. Limited studies have investigated the predictability of these conditions and their associated risk factors.

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Background: The COVID-19 pandemic has necessitated a rapid uptake of telemedicine in primary care requiring both patients and providers to learn how to navigate care remotely. This change can impact the patient-provider relationship that often defines care, especially in primary care.

Objective: This study aims to provide insight into the experiences of patients and providers with telemedicine during the pandemic, and the impact it had on their relationship.

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Importance: The frequency and characteristics of post-acute sequelae of SARS-CoV-2 infection (PASC) may vary by SARS-CoV-2 variant.

Objective: To characterize PASC-related conditions among individuals likely infected by the ancestral strain in 2020 and individuals likely infected by the Delta variant in 2021.

Design: Retrospective cohort study of electronic medical record data for approximately 27 million patients from March 1, 2020-November 30, 2021.

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Background: Compared to white individuals, Black and Hispanic individuals have higher rates of COVID-19 hospitalization and death. Less is known about racial/ethnic differences in post-acute sequelae of SARS-CoV-2 infection (PASC).

Objective: Examine racial/ethnic differences in potential PASC symptoms and conditions among hospitalized and non-hospitalized COVID-19 patients.

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Article Synopsis
  • PASC affects numerous organ systems in many COVID-19 patients, but the link between environmental exposures (the "exposome") and PASC risk is not well understood.
  • Researchers analyzed health data from two major clinical networks and identified environmental risk factors linked to 23 PASC symptoms from nearly 200 exposome factors, including air quality and neighborhood characteristics.
  • Their study revealed specific environmental risks that varied between New York City and Florida, highlighting the need for further research to guide public health measures for aiding recovery after SARS-CoV-2 infection.
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Article Synopsis
  • The study analyzed the impact of the Social Deprivation Index (SDI) on in-hospital outcomes like intubation and mortality in COVID-19 patients using electronic health records from a large clinical research network.* -
  • Despite knowing that SDI affects who gets COVID-19 and its severity, the research found that SDI did not improve predictions for intubation or mortality once patients were hospitalized.* -
  • The analysis included data from over 30,000 patients and showed that traditional factors like demographics and comorbidities were sufficient for predicting hospital outcomes without needing to factor in SDI.*
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Background: An increasing number of studies have described new and persistent symptoms and conditions as potential post-acute sequelae of SARS-CoV-2 infection (PASC). However, it remains unclear whether certain symptoms or conditions occur more frequently among persons with SARS-CoV-2 infection compared with those never infected with SARS-CoV-2. We compared the occurrence of specific COVID-associated symptoms and conditions as potential PASC 31 to 150 days following a SARS-CoV-2 test among adults (≥20 years) and children (<20 years) with positive and negative test results documented in the electronic health records (EHRs) of institutions participating in PCORnet, the National Patient-Centered Clinical Research Network.

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