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The Risk Factors of Covid-19 in 50-74 Years Old People: A Longitudinal Population-Based Study Publisher



Hozhabr JA1 ; Emamian MH2 ; Goli S3 ; Rohanirasaf M4 ; Hashemi H5 ; Fotouhi A6
Authors

Source: Epidemiologic Methods Published:2021


Abstract

Objectives: To investigate the risk factors of COVID-19 infection in a longitudinal study of a population aged 50-74 years. Methods: Data were collected from Shahroud Eye Cohort study and the COVID-19 electronic registry in Shahroud, northeast Iran. Participants were followed for about 13 months and predisposing factors for COVID-19 infection were investigated using log binominal model and calculating relative risks. Results: From the beginning of the COVID-19 outbreak in Shahroud (February 20, 2020) to March 26, 2021, out of 4,394 participants in the Eye Cohort study, 271 (6.1%) were diagnosed with COVID-19 with a positive reverse transcription polymerase chain reaction test on two nasopharyngeal and oropharyngeal swabs. Risk factors for COVID-19 infection included male gender (relative risk (RR) = 1.51; 95% confidence intervals (CI), 1.15-1.99), body mass index (BMI) over 25 (RR = 1.03; 95% CI, 1.01-1.05), and diabetes (RR = 1.31; 95% CI, 1.02-1.67). Also, smoking (RR = 0.51; 95% CI, 0.28-0.93) and education (RR = 0.95; 95% CI, 0.92-0.98) showed inverse associations. Conclusions: Men, diabetics, and those with BMI over 25 should be more cognizant and adhere to health protocols related to COVID-19 prevention and should be given priority for vaccination. © 2021 Walter de Gruyter GmbH, Berlin/Boston.
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