Table 1 Characteristics of studies calculating incubation period SARS-COV-2
From: The incubation period during the pandemic of COVID-19: a systematic review and meta-analysis
Authors | Country (province) | Period | Data and source collection | General characteristics of the population study | Exposure history | ||
|---|---|---|---|---|---|---|---|
N | Age┼┼ (years) | Sex ratio (M/F) | |||||
Guan et al. [27] | China | 11/12/2019 to 29/01/2020 | 552 hospitals’ medical records | 1099 | Median =47 IQR [35-58] | 1.43 | Contact with wildlife Resident or travelers to Wuhan |
Ki and Task Force for 2019-nCoV [28] | Korea | 20/01/2020 to 10/02/2020 | CDC Additional data announced by the press | 28 | Mean= 42 Range (20–73) | 1.15 | Close contact with confirmed cases |
Chen et al. [43] | China (Chongqing) | 28/01/2020 to 11/02/2020 | 3 hospitals’ medical records | 12 | Mean=14.5 range (7M–17Y) | 1 | Resident or travelers to Wuhan Close contact with confirmed cases |
Gao et al. [7] | China (Wuxi) | January–March 2020 | Data of scientific investigation from “Public Health Emergency Reporting Management Information System” | 15 | Median= 51 Range (9–74) | 1.5 | Close contact with confirmed cases |
Huang et al. [8] | China (Anhui) | January–February 2020 | Information from patients and contacts. | 17 | Median=22 Range (16–23) | 0.75 | Close Contact with confirmed cases |
Pung et al. [38] | Singapore | February 2020 | The ministry of health (first three clusters) | 36 | - - | - | Close contact with a tourist group from China Public place (company conference/church) |
Song et al. [39] | China (Beijing) | 16/01/2020 to 29/01/2020 | 1 hospital’s medical records (4 families) | 24 | Range (9M–86 Y) | 0.37 | Close contact with confirmed cases |
Tian et al. [44] | China (Beijing) | 20/01/2020 to 10/02/2020 | 57 hospitals’ medical records | 262 | Median =47.5 Range (6M–94 Y ) | 0.94 | Wuhan travel Close contact with confirmed cases Family cluster cases |
Wang et al. [25] | China (Jiangsu ) | 22/01/2020 to 18/02/2020 | Websites of bureau of health and the people’s government. | 631 | - - | >1 | Resident or travelers to Hubei province Close contact with confirmed cases Others |
Xia et al. [40] | China (Chongqing) | 23/01/2020 to 18/02/2020 | Hospital electronic medical record system of patient with severe acute respiratory syndrome | 10 | Mean =56.5±11.16 | 1.5 | Close contact with confirmed cases |
Xu et al. [54] | China (Changzhou) | 23/01/2020 to 18/02/2020 | Laboratory-confirmed cases | 51 | Mean =35.0 Range (29–51) | 0.96 | Resident or travelers to Wuhan Close contact with confirmed or suspected cases |
Bernard et al. [41] | France | 24/01/2020 to 12/02/2020 | Unspecified | 3 | - | - | - |
Yu et al. [30] | China (Shanghai) | As of February 19th, 2020. | CDC | 333 | Median =50 | 1.06 | Cases with a travel history in Wuhan Close contact with confirmed cases |
Li et al. [20] | China (Wuhan) | December 2019 to 22 January 2020 | Laboratory-confirmed cases of infected pneumonia(NCIP) | 425 | Median= 59 Range(15 to 89) | 1.29 | Contact with wildlife Close contact with suspected cases |
Zhang et al. [23] | China outside Hubei | 19/01/2020 to 17/02/ 2020 | Laboratory-confirmed cases | 8579 | Median= 44 Range (33–56) | - | Contact with wildlife Close contact with confirmed or suspected cases Resident or travelers to Wuhan |
Linton et al. [29] | China | December 2019 to January 2020 | Official reports from governmental institutes | 158 | Most (30–59) | 0.58 | Resident or travelers to Wuhan |
Backer et al. [55] | China | 20 to 28 January 2020 | CDC | 88 | Range (2–72) | 1.84 | Travelers to Wuhan |
Lauer et al. [56] | China 24 countries outside China | 04/01/2020 to 24/02/2020 | Public health reports and news | 181 | Median= 44.5 IQR [34.0–55.5] | 1.56 | Resident or travelers to Wuhan Close contact with confirmed cases or travelers from Hubei |
Wang et al. [57] | China (Henan) | 21/01/2020 to 14/02/2020 | CDC | 1212 | Most (21–60) | 1.22 | Travelers to Wuhan Close contact with confirmed cases |
Bi et al. [24] | China (Shenzhen) | 14/01/2020 to 12/02/2020 | CDC | 3911 | Mean=45 | 0.91 | Travelers to Wuhan Close contact with confirmed cases |
Zheng et al. [45] | China (Hubei) | 16/01/2020 to 04/02/2020 | Taihe Hospital medical records | 73 | Mean=43 | 1.73 | Huanan China Seafood Market 12 cases had no exposure history Family cluster cases |
Zhao et al. [46] | China (Jiangsu ) | 16/01/2020 to 17/02/2020 | Jiangsu Hospital medical records | 136 | Median=49 IQR [33-63] | 1 | Resident or travelers to Wuhan Close contact with confirmed cases Family cluster cases 14 cases had no exposure history |
Zhang et al. [59] | China (Hubei) | 22/01/2020 to 28/02/2020 | Huanggang Hospital Shandong First Medical University | 194 | Median=48.3 | 1.25 | Contact with wildlife Resident or travelers to Wuhan |
Yang et al. [26] | China (Hubei) | 20/01/2020 to 29/02/2020 | CDC | 672 | Range (35–64) | 1.08 | Wuhan-imported Close contact of imported cases Locally infected |
Xiao et al. [31] | China (Hubei, Qinghai, Tibet) | As of February 21th, 2020. | CDC | 4741 | Median =50 | 1.06 | Resident or travelers to Wuhan Local community transmission |
Wong et al. [32] | Brunei | 09/03/2020 to 05/04/2020 | CDC | 135 | Median= 36 Range(0.5–72) | 1.54 | Travel history outside Brunei Local community transmission |
Wang et al. [47] | China (Wuhan) | 05/01/2020 to 12/02/2020 | Wuhan Union Hospital | 35 | Median= 37 Range(25–88) | 0.59 | 27 health care worker 10 relatives to health care worker |
Viego et al. [33] | Argentina (Bahia Blanca) | 20/03/2020 to 08/05/2020 | Local health authorities | 36 | - | - | Travel history outside city Local community transmission |
Tindale et al. [52] | Singapore | 23/01/2020 to 26/02/2020 | Publicly available data | 93 | - | - | |
China (Tianjin) | 21/01/2020 to 22/02/2020 | 135 | - | ||||
Tan et al. [48] | Singapore | 23/01/2020 to 02/04/2020 | Hospital records | 164 | Mean = 44.2 ±15.8 | 0.88 | Travel history Local community transmission |
Ryu et al. [34] | South Korea | 20/01/2020 to 21/04/2020 | Local public health authorities | 2023 | Median= 42 Range(1–102) | 0.24 | Clusters Imported from Daegu-Gyeongsangbuk or abroad Local transmission |
Qin et al. [35] | China (outside Hubei) Other countries | as of 15 February 2020 | Publicly available data in China The ministries of health in other countries | 1084 | Mean = 41.31 Median= 40 | 1.31 | - |
Nie et al. [60] | China (outside Hubei) | 19/01/2020 to 08/02/2020 | The website of the National Health Commission of the People’s Republic of China The health commission website of each province or city. | 7015 | Mean = 44.24 Range (2 m–97 y) | 1.11 | Resident or travelers to Wuhan Close contact with confirmed cases |
Lou et al. [50] | China | 19/01/2020 to 09/02/2020 | Hospital records | 80 | Median=55 IQR [45-64] | 1.58 | - |
Liu et al. [62] | China (Shenzhen) | 04/01/2020 to 05/02/2020 | 365 | Median=46 Range (1–86) | 0.99 | Contact with confirmed case-patients Wuhan Cities other than Wuhan in Hubei Province No definite exposure | |
Li et al. [49] | China (Shenzhen) | 21/01/2020 to 09/02/2020 | Hospital records | 74 | Mean = 44.26 | 0.89 | Travelers to Wuhan Family clusters Sporadic cases |
Lee et al. [51] | South Korea | 20/02/2020 to 03/03/2020 | Publicly available data | 47 | Median=30 Range (17–83) | - | - |
Chun et al. [9] | South Korea | 23/01/2020 to 31/03/2020 | Public reports of confirmed COVID-19 patients by the government and each municipal website in South Korea | 72 | Median=40 IQR [24-54] | 0.89 | Contact with confirmed cases |
Alsofayan et al. [53] | Saudi Arabia | 01/03/2020 to 31/03/2020 | Health Electronic Surveillance Network (HESN) Database | 1519 | Median=36 | 1.18 | History of recent travel outside KSA Local community transmission |
Bohmer et al. [42] | Germany (Bavaria) | 27/01/2020 to 16/02/2020 | Bavarian Health and Food Safety Authority and national level (Robert Koch Institute) public health authorities and four public health laboratories. | 16 | Median=35 IQR [27-42] Range (2–58) | 3.0 | Cluster |
You et al. [36] | China (outside Hubei province) | 01/01/2020 to 31/03/2020 | The National Health Commission (NHC) of China | 169 | - | - | Resident or travelers to Hubei |
Wieland [37] | Germany | 15/02/2020 to 31/03/2020 | Official German case data | 107 | - | - | - |