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Table 3 Methodological characteristics of COVID-19 research articles in January 2020

From: Epidemiology, causes, clinical manifestation and diagnosis, prevention and control of coronavirus disease (COVID-19) during the early outbreak period: a scoping review

CharacteristicsCategoriesn%
Study design
(n = 65)
Cross-sectional studies1218.5
Mathematical modeling2944.6
Molecular studies1015.4
Diagnostic studies23.1
Review34.6
Theoretical study913.9
Targets of study
(n = 65)
Population3249.2
Patients2233.9
General population69.2
Healthcare workers46.2
Species (virus structure, gene sequence)2436.9
Other913.9
Study related to population (n = 32)
Sample size1–101134.4
11–50515.6
51–10039.4
> 10039.4
Not specified1031.3
Study settingLaboratory26.3
Hospital1031.3
Community00.0
Hospital and community00.0
Not specified2062.5
Questionnaire710.8
Data-collection instrumentaBiological specimen collection13.1
Physical examinations00.0
Environmental sample00.0
Hospital, medical, or exposure records1443.7
Secondary data1650.0
Quality-control activities for data collectionIndicated in the article1456.3
Not specified1843.8
  1. a Percentages in this section do not add up to 100% because multiple answers were possible