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Volume 28, Number 2—February 2022

Comparison of Complications after Coronavirus Disease and Seasonal Influenza, South Korea

Hyejin Lee1, Ho Kyung Sung1, Dokyoung Lee1, Yeonmi Choi, Ji Yoon Lee, Jin Yong Lee2Comments to Author , and Myoung-don Oh2Comments to Author 
Author affiliations: Seoul National University Bundang Hospital, Seongnam-si, South Korea (H. Lee); National Medical Center, Seoul, South Korea (H.K. Sung, M. Oh); Health Insurance Review & Assessment Service Research Institute, Wonju-si, South Korea (D. Lee, Y. Choi, J.Y. Lee, J.Y. Lee); Seoul National University Hospital, Seoul (J.Y. Lee); Seoul National University College of Medicine, Seoul (J.Y. Lee, M. Oh)

Main Article

Table 3

Factors associated with incidence of complications in study of COVID-19 and influenza patients, South Korea*

Variable Adjusted odds ratio (95% CI)†
COVID-19, n = 21,615 Influenza, n = 2,380,696
Female (referent: male)
1.03 (0.96–1.11)
1.04 (1.04–1.05)
Age, y (referent: 20–44 y)
  0–19 0.69 (0.59–0.80) 0.94 (0.94–0.95)
  45–64 0.81 (0.74–0.88) 0.97 (0.96–0.98)
  65–74 0.86 (0.76–0.96) 1.07 (1.05–1.08)
0.86 (0.75–0.99)
1.26 (1.24–1.28)
National Health Insurance Service (referent: Medical Aid)
0.85 (0.75–0.97)
0.94 (0.92–0.96)
Region (referent: other areas)
  Seoul metropolitan area 0.90 (0.82–0.99) 1.03 (1.02–1.03)
  Daegu and Gyeongsangbuk province
1.44 (1.31–1.59)
1.02 (1.01–1.03)
Charlson Comorbidity Index score (referent: 0)
   1–2 1.02 (0.94–1.11) 1.08 (1.08–1.09)
1.01 (0.88–1.16)
1.12 (1.10–1.13)
Severity (referent ambulatory state)
  Hospitalized mild disease 1.19 (1.09–1.30) 1.22 (1.21–1.23)
  Hospitalized severe disease 1.11 (0.91–1.34) 1.36 (1.29–1.43)

*COVID-19, coronavirus disease. †Multivariable logistic regression includes sex, age, type of insurance, region, and Charlson Comorbidity Index.

Main Article

1These first authors contributed equally to this article.

2These corresponding authors contributed equally to this article.

Page created: December 08, 2021
Page updated: January 22, 2022
Page reviewed: January 22, 2022
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