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Objectives: The outbreak of Coronavirus Disease 2019 (COVID-19) has influenced all age groups; however, the risk of mortality increases with age. Several factors impact the development of this disease. This study aimed to determine the relationship between some risk factors in the development of COVID-19 among community dwellers of≥ 50 years of age. This cross-sectional study was performed at Shahroud University of Medical Sciences from April 1, 2019, to June 20, 2020.

Methods & Materials: This cross-sectional study was conducted on individuals aged≥ 50 years, including middle-aged and aging suspected of COVID-19 referring to registration centers in Shahroud University of Medical Sciences from Feb. 20th to Jun. 20th, 2020. The basis for diagnosing COVID-19 in suspected cases was a positive Reverse Transcription Polymerase Chain Reaction (RT-PCR) test based on a nasopharyngeal swab or Computed Tomography (CT) scan. The data used included demographic information, a history of smoking, and comorbidities. Data analysis was performed in SPSS by descriptive statistics, Chi-squared test, Independent Samples t-test, and logistic regression model.

Results: In the first 4 months of the COVID-19 outbreak, 3945 suspicious cases were referred to Shahroud healthcare centers. After removing the missing cases, of the 3119 registered cases, 1348 participants were aged≥ 50 years. Of all eligible participants, 602 cases were diagnosed with COVID-19, and 303 were males. The obtained data suggested that the Mean±SD age of the study subjects was 66.62±11.33 years. Diabetes (P= 0.014) and other comorbidities, such as …