Nickan Research Institute Journal of Parathyroid Disease 2345-6558 11 1 2023 01 01 Clinical characteristics of hospitalized patients with COVID-19: Results from multiple-center experience in Ardabil, Northwest of Iran e11192 e11192 10.34172/jpd.2023.11192 EN Somaieh Matin https://orcid.org/0000-0002-3404-8868 Hassan Ghobadi https://orcid.org/0000-0001-7480-5651 Elham Safarzadeh https://orcid.org/0000-0001-6160-8923 Leila Torabi Marjin https://orcid.org/0000-0001-9878-5149 Masoomeh Dadkhah https://orcid.org/0000-0001-8649-8476 Journal Article 10.34172/jpd.2023.11192 2022 12 03 2023 02 01 Introduction: Since December 2019, coronavirus disease 2019 (COVID-19) has rapidly expanded to cause a worldwide pandemic. Objectives: We aimed to report the clinical characteristics of infected patients at the first wave in northwest of Iran. Patients and Methods: In this study, the epidemiological, demographic, clinical, and laboratory data of 1152 confirmed patients with COVID-19 who were admitted to two main hospitals at the first outbreak in northwest of Iran were collected and analyzed. Results: The most common clinical manifestations at onset were cough (65.8%), dyspnea (40.2%), myalgia (37.8%), and fever (63.4%), loss of appetite (47%), chest pain (38.6%), and headache (49.4%). While the less common were agitation (17.3%), vomiting (22.2%), diarrhea (16.7%), and nausea (24.3%). Laboratory data indicated significant correlation between lymphocyte counts with the severity of the disease based on O2 saturation. Conclusion: Overall, assessment the clinical data of COVID-19 patients play a crucial role in understanding the outbreak of novel viral pneumonia, which helps to identify high risk individuals with COVID-19.