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Table 4 Main epidemiological indicators 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

Indicators

Description

Age of patients

• Cases range between 25 and 89 years, with most patients aged between 35 and 55 years and fewer cases among children and infants [14]

• Median age of patients is 59 years, ranging from 51 to 89 [2]

• Average age of patients was 55.5 years; age distribution: ≤ 39: 10%; 40–49: 22%, 50–59: 30%; 60–69: 22%, ≥ 70: 15% [19]

• Cases range from 2 to 72 years [20]

Sex of patients

• More cases were males [20]

• 59% males [2]

• 68% males [19]

Age of the deaths

• Median age of death was 75 (with a range between 48 and 89 years) [21]

Exposure history

• Huanan Seafood Market in Wuhan [19, 22]

• Wuhan residents or people who visited Wuhan [20]

Incubation time

• 4.8 ± 2.6 days (2–11 days) [15]

• 5.2 days (4.1–7 days) [2]

• Average of 7 days (2–14 days) [23]

• Average of 10 days [22]

• 5–6 days [24]

• Average of 6.4 days (5.6–7.7 days) [20]

Basic Reproduction (R0)

• 2.6 (uncertainty range: 1.5–3.5) [25]

• 3.8 (95% CI: 3.6–4.0) [26]

• 2.2 (1.4–3.8) [27]

• 4.71 (4.50–4.92) [24]

• 2.68 (95% CI: 2.47–2.86) [28]

Susceptible populations

• Elderly people [21]

• People with poor immune function [2]

• People with chronic co-morbidities [2, 15, 19, 21]

• People with long-term use of immunosuppressive agents [19]

• Surgery history before admission [21]

Mortality rate

• 3% (between 29 December 2019 to 23 January, 2020) [15]

• 2.3% (as of 28 January 2020) [29]

• 2.8% (as of 25 January, 2020) [21]

• 2.9% (as of 25 January, 2020) [30]

• 11% (as of 25 January, 2020) [19]

• 3.1% (as of 24 January 2020) [31]