Kizilirmak D.Fidan U.Sari S.Havlucu Y.2024-07-222024-07-22202304941373http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/12356Introduction: Post-COVID period is considered to be 12 weeks after the COVID-19 infection. Patients in the post-COVID period may have prolonged or newly developed symptoms. Depending on the prolonged effects of the disease, respiratory and functional parameters may be affected. The aim of the study is to investigate the effect of COVID-19 infection on respiratory and functional parameters in the post-COVID period. Materials and Methods: A cross-sectional study was conducted to evaluate the functional parameters of patients with COVID-19 in the post-COVID peri-od. Subjects with a history of microbiologically proven COVID-19 infection were evaluated with 6-minute walk test results, Borg, and MRC results at least 12 weeks after COVID-19 infection. The relationship between demographic characteristics, comorbidities, vaccination status, and severity of disease with 6-minute walk test results and dyspnea scales in the post-COVID period was investigated. Results: Two hundred seventeen patients were included in the study. The mean age of the patients was 48.6 ± 14.9 years and 126 (58.1%) of them were fema-le. 142 (65.4%) of the patients were completely vaccinated against COVID-19 and 75 (34.6%) patients were incompletely vaccinated or unvaccinated. 158 (72.8%) patients had mild disease, 51 (23.5%) patients had moderate disease, and eight (3.7%) patients had severe disease. Those with a history of moderate or severe disease had significantly worsened functional parameters in the post-COVID period compared to those with mild COVID-19. The Borg scale and MRC dyspnea scale values were significantly higher in women (p= 0.008, p= 0.002, respectively). Functional parameters of those who were completely vaccinated against COVID-19 and those who were incompletely or unvaccinated individuals in the post-COVID period were similar. Conclusion: The functional parameters of people with moderate or severe COVID-19 disease were found to be significantly impaired in the post-COVID period. While the effect of smoking and vaccination status on functional parameters in the post-COVID period could not be demonstrated, disease severity and accompanying comorbidity were found to be effective. © 2023 by Tuberculosis and Thorax.EnglishAll Open Access; Gold Open AccessAdultCOVID-19Cross-Sectional StudiesDyspneaFemaleHumansMaleMiddle AgedSmokingadultarterial pressurearthralgiaArticleasthmabody massbreathing ratecardiopulmonary functionchi square testchronic obstructive lung diseaseclinical featurecomorbidityconnective tissue diseasecoronary artery diseasecoughingcross-sectional studydemographicsdiabetes mellitusdisease severitydyspneafatiguefemalefeverfibrosing alveolitisfunctional statusheadacheheart rateHorowitz indexhumanhypertensionimmunizationinterstitial lung diseaselong COVIDmajor clinical studymaleMedical Research Council Dyspnea Scalemiddle agedoxygen saturationoxygen therapyphysical activityregression analysisrespiratory tract infectionrespiratory tract parameterssix minute walk testsmokingsore throatvaccinationcoronavirus disease 2019dyspneaArticle10.5578/tt.20239915