We used both predefined (based on established knowledge) and—in recognition of our incomplete and evolving knowledge of COVID-19—an expanded set of 100 algorithmically selected covariates in several data domains including diagnostic codes, prescription records and laboratory test results to balance ...
2,3,4,5,6,7,8,9,10,11,12. A complete list of postacute sequelae examined is provided in Supplementary Table15. Occurrences of sequelae were identified using definitions that, where applicable, used data from domains including diagnoses codes, laboratory values and medication ...
(EHR) data serve as a rich data source for studying PASC symptoms. However, retrospective studies that primarily utilize structured EHR data (e.g., lab results orInternational Classification of Disease[ICD] diagnosis codes)[11],[14],[19]may miss many clinical symptoms, which are often ...
A cohort of patients was created of Veterans with a diagnosis of HNSCC of the oral cavity,oropharynx, hypopharynx, larynx, and nasopharynx based on International Classification of Disease (ICD) codes. Data collected included clinical/demographic data, vaccination status, and incidence ...
We conducted an analysis of the vascular surgery regional center reorganization in response to the first and the second wave of the coronavirus disease-2019 (COVID-19) pandemic to see what lessons we learned from the first wave. Methods The study included a total of 632 patients admitted to ...
Data on demographic characteristics, laboratory results, and the ICD-9 codes were derived from our electronic medical records system. COVID-19 RT-PCR tests on nasopharyngeal swabs were performed by experienced personnel in a single centralized laboratory accordingly to international guidelines.16 All con...
SARI cases were defined as patients containing ICD-10 codes for influenza-like illness, cardiovascular diagnosis, respiratory diagnosis, and respiratory infection in their primary admission diagnosis. Independent variables included weekly COVID-19 and influenza incidence in the North and...
For all definitions, we excluded elective and maternal hospitalizations and those where the primary reason for admission was an injury (ICD-10 chapters 19 and 20). Variants of Concern We defined time periods where different variants were dominant in England using UKHSA data. These periods were ...
To obtain information on symptoms in COVID-19 patients, we used two different data sources: symptoms recorded by physicians as ICD-9 codes and self-reported symptoms from the survey (see Supplementary notes2and3, Supplementary Fig.1).
Because they extracted asthma patients with ICD-10 codes only, study population could have included those without pure asthma comorbidity. In addition, Choi et al. also reported higher mortality in asthma patients than in non-asthma patients among COVID-19 patients48. However, asthma itself and ...