Japan
Prospective cohort study
Primary data collection
3711
Passengers and crew members on board of Diamond Princess cruise ship.
National Institute of Infectious Diseases (NIID). Field Briefing: Diamond Princess COVID-19 Cases. Tokyo: NIID; 19 Feb 2020. Available from: https://www.niid.go.jp/niid/en/2019-ncove/9417-covid-dp-fe-02.html
Total
1 Month
Developing COVID-19 after contamination
301
Confirmed cases of SARS-COV2 (using PCR) developing symptoms
Patient characteristics
Age
none
20-39 years
52
775
80-89 years
29
54
Odds ratio
0.220 (0.090-0.530)
Yes
No
ORs are calculated using data reported in the article
Average