Optimal selection of pairs of subjects in case-control studies: demonstration  of matching method using example of analysis of impact of covid-19 pandemic on staff of medical organizations

Korneenkov, A. A.; Ovchinnikov, P. A.; Rezvantsev, M V; Vyazemskaya, E. E.; Dvoryanchikov, V. V.; Budkovaya, M. A.

doi:10.18692/1810-4800-2022-5-34-46

2022

DOI: 10.18692/1810-4800-2022-5-34-46

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Optimal selection of pairs of subjects in case-control studies: demonstration of matching method using example of analysis of impact of covid-19 pandemic on staff of medical organizations

A. A. Korneenkov¹,

P. A. Ovchinnikov²,

M V Rezvantsev³

et al.

Abstract: Case-control studies are retrospective observational studies designed to determine the relationship between the outcome of interest and its potential cause. This study design has known disadvantages: possible bias in the results, selection bias in the control group, etc. In order to avoid inconsistency between the study and control groups and thus underestimating of the possible influence of intervening factors (confounder), a whole class of methods is used to ensure that case-control matching pairs are select… Show more

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Cited by 2 publications

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Geography of patients in the federal ENT hospital before and after the COVID-19 pandemic: changing spatial patterns and characteristics

Korneenkov,

Ovchinnikov,

Vyazemskaya

et al. 2023

Medicinskij sovet

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Introduction. During the COVID-19 pandemic, access to elective specialized healthcare has decreased significantly. In addition to economic, social, cultural, organizational and language factors, access to healthcare also includes geographic factors. In our country, geographical barriers are an important negative factor hampering access to healthcare for patients living far from regional and federal centres.Aim. This analysis provides an indirect view of the change in the availability of specialized medical otorhinolaryngological care. Describe the procedure for conducting a spatial analysis of the geographic accessibility of medical care.Materials and methods. The study analyzed changes in the spatial characteristics of the place of residence of patients admitted for inpatient treatment at the St Petersburg Research Institute of Ear, Nose and Speech Throat before and after the onset of the COVID-19 pandemic. The study materials used anonymized data of 32,304 patients who were treated in a 24-hour hospital at the St Petersburg Research Institute of Ear, Nose and Throat and Speech from January 2016 to December 2022. Descriptive statistics, spatial statistics, non-parametric methods for testing hypotheses (Wilcoxon criterion for independent samples), odds ratio for binary factors and outcomes processed in the R software environment, built on the basis of OpenStreetMap cartography with QGIS geocoding, were used as research methods.Results and discussion. In the study, geographic patterns of places of residence (locations) of inpatients before and after COVID-19 were obtained, and a visual assessment of their changes was made. The distances between the place of residence of patients and the place of provision of ENT care were calculated, and hypotheses were tested on the equality of the average geographical distance to the places of residence of patients before and after the pandemic. A count of patients and areas of zones of nuclear assessment of the probability density of patient locations in the country before and after the pandemic was made. The design of the study was an observational analytical retrospective study of the spatial characteristics of inpatients, in which the event of the onset of the COVID-19 pandemic acted as a factor.Conclusion. In general, after the resumption of planned inpatient otorhinolaryngological care, its availability, which can indirectly be assessed using a spatial statistical analysis of the places of residence of patients of a federal budgetary institution, has not changed.

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Geography of patients in the federal ENT hospital before and after the COVID-19 pandemic: changing spatial patterns and characteristics

Korneenkov,

Ovchinnikov,

Vyazemskaya

et al. 2023

Medicinskij sovet

Self Cite

View full text Add to dashboard Cite

show abstract

Information systems as a source of meaningful information in an epidemic: experience and lessons in restoring routine otorhinolaryngology care after the COVID-19 pandemic

Korneenkov,

Ovchinnikov,

Vyazemskaya

et al. 2024

Medicinskij sovet

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Introduction. The COVID-19 pandemic has modified the information needs of participants in the public health management system and identified a lack of information for making management and health decisions during the pandemic.Aim. To summarize and provide a general description of information and data that should be available in the health information system of otorhinolaryngological health facilities for decision-making in epidemic settings based on the results of conducted studies.Materials and methods. In this study we used our own experience in addressing information challenges on optimization of otorhinolaryngological care both at the height of pandemic and after renewal of scheduled visits and hospital admissions. We considered studies under the auspices of WHO on assessment of the effectiveness of health information systems as a whole and individual works that were carried out to analyse the impact of the pandemic on provision of otorhinolaryngological care.Results and discussion. The content of data used for decision-making in a pandemic has been substantiated in the following areas: 1) provision of health care should be organized as close as possible to the patient’s personalized care plan with due account for temporal and spatial factors – it is proposed to use patient’s geographic data, patient’s health characteristics indicating the date and time they were registered; 2) health care facilities personnel should be ready to provide medical care – it is proposed to use the results of periodic surveys of health care facilities personnel with regard to their awareness of an epidemic, concern about different risks, working conditions satisfaction, motivation, and emotional status; 3) provision of health care should be simulated, and the optimal option for organizing and distributing the workload should be verified and selected – it is proposed to use service algorithms and necessary resources.

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Optimal selection of pairs of subjects in case-control studies: demonstration of matching method using example of analysis of impact of covid-19 pandemic on staff of medical organizations

Cited by 2 publications

References 4 publications

Geography of patients in the federal ENT hospital before and after the COVID-19 pandemic: changing spatial patterns and characteristics

Geography of patients in the federal ENT hospital before and after the COVID-19 pandemic: changing spatial patterns and characteristics

Information systems as a source of meaningful information in an epidemic: experience and lessons in restoring routine otorhinolaryngology care after the COVID-19 pandemic

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