Question

Name Show all your work! #1. The table below is based on the actual Case fatality rates from COVID 19 (Corona Virus), by age groups, in China. Data are through February 11, 2020. Is there an association between mortality and age? How strong is this association? (10 pts) D Age/Death from COVID19 60+ years (O) 10-59 years (Y) Total ied 260 23 Survived 740 977 1717 Total 1000 1000 2000 Calculate Relative Risk of death due to COVID19 in the older (60+) population compared with the younger (<60). Interpret the RR. (b) Calculate and interpret the Odds Ratio (OR).

Answer 1

1.Relatively risk=p(event in exposed group)/p(event in non-exposed group ).

P(event in exposed group )=(260/1000)*100=26

P(event in non-exposed group )=(23/1000)*100=2.3

Therefore Relatively risk=26/2.3=11.30

2.Odd ratio=(a*d)/(b*c)

Were a=260, b=23, c=740, d=977

Therefore odd ratio=(260*977)/(23*740)=14.92

3.ORR is similar to RR the only difference is ORR is taken on odd ratio while RR is taken in percentage.

4.Mortality rate=(260/1000)*100=26%

5.Attributed risk %=[(260/1000)-(23/1000)]/(260/1000)=43.47%