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Clinical Characteristics of Asymptomatic Patients with COVID-19: A Nationwide Cohort Study in South Korea.
Jung, Chan-Young; Park, Haeyong; Kim, Dong Wook; Choi, Yoon Jung; Kim, Seong Woo; Chang, Tae Ik.
  • Jung CY; Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyangshi, Gyeonggi-do, Republic of Korea.
  • Park H; Research and Analysis Team, National Health Insurance Service Ilsan Hospital, Goyangshi, Gyeonggi-do, Republic of Korea.
  • Kim DW; Department of Big Data, National Health Insurance Service, Wonju-si, Gangwon-do, Republic of Korea.
  • Choi YJ; Department of Pathology, National Health Insurance Service Ilsan Hospital, Goyangshi, Gyeonggi-do, Republic of Korea.
  • Kim SW; Department of Physical Medicine and Rehabilitation, National Health Insurance Service Ilsan Hospital, Goyangshi, Gyeonggi-do, Republic of Korea.
  • Chang TI; Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, Goyangshi, Gyeonggi-do, Republic of Korea. Electronic address: kidneyjang@gmail.com.
Int J Infect Dis ; 99: 266-268, 2020 Oct.
Article in English | MEDLINE | ID: covidwho-695925
Semantic information from SemMedBD (by NLM)
1. Asymptomatic PROCESS_OF Patients
Subject
Asymptomatic
Predicate
PROCESS_OF
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Patients
2. COVID-19 PROCESS_OF Patients
Subject
COVID-19
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Patients
3. Asymptomatic PROCESS_OF Persons
Subject
Asymptomatic
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Persons
4. Asymptomatic PROCESS_OF Patients
Subject
Asymptomatic
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Patients
5. COVID-19 PROCESS_OF Patients
Subject
COVID-19
Predicate
PROCESS_OF
Object
Patients
6. Asymptomatic PROCESS_OF Persons
Subject
Asymptomatic
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PROCESS_OF
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Persons
ABSTRACT

OBJECTIVES:

To delineate clinical characteristics of asymptomatic and symptomatic patients confirmed with COVID-19 in South Korea.

METHODS:

Data were obtained from the Korean National Health Insurance Service database linked to the Korea Centers for Disease Control and Prevention data.

RESULTS:

Among 10,237 patients (mean [SD] age, 45.0 [19.8] years; 60.1% female) who met the eligibility criteria for the study, 6,350 (62.0%) patients were asymptomatic, and 3,887(38.0%) patients were symptomatic. The mean and median age were similar between asymptomatic and symptomatic patients. Notably, we observed a U-shaped association between age group and the proportion of asymptomatic patients, with the nadir at 57.3% in the 40-49 age group. This U-shaped distribution was largely similar between men and women. The overall prevalence of asymptomatic individuals was higher, regardless of sex, residential area, income levels, and comorbid conditions.

CONCLUSIONS:

In this national cohort of over 10,000 patients with COVID-19, more than 60% of all cases in South Korea reported no symptoms at the time of diagnosis. Expanding criteria for contact tracing and testing to capture potential transmission before symptom onset should be urgently considered to inform control strategies for COVID-19.
Subject(s)
Keywords

Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / Asymptomatic Infections / Betacoronavirus Type of study: Etiology study / Incidence study / Observational study / Risk factors Limits: Adult / Female / Humans / Male / Middle aged / Young adult Country/Region as subject: Asia Language: English Journal: Int J Infect Dis Journal subject: Communicable Diseases Year: 2020 Document Type: Article

Full text: Available Collection: International databases Database: MEDLINE Main subject: Pneumonia, Viral / Coronavirus Infections / Asymptomatic Infections / Betacoronavirus Type of study: Etiology study / Incidence study / Observational study / Risk factors Limits: Adult / Female / Humans / Male / Middle aged / Young adult Country/Region as subject: Asia Language: English Journal: Int J Infect Dis Journal subject: Communicable Diseases Year: 2020 Document Type: Article