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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
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Authors Affiliations
  1. 1. Research Committee, School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
  2. 2. Ophthalmic Epidemiology Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
  3. 3. Department of Epidemiology, School of Public Health, Shahroud University of Medical Sciences, Shahroud, Iran
  4. 4. Center for Health Related Social and Behavioral Sciences Research, Shahroud University of Medical Sciences, Shahroud, Iran
  5. 5. Noor Ophthalmology Research Center, Noor Eye Hospital, Tehran, Iran
  6. 6. Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran

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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