Calculate the appropriate effect measure that shows the relationship between being an engineer and the risk of being diagnosed with cardiovascular disease.

(i) Draw a 2*2 table.

(ii) show your working

(iii)and interpret the results (ii)in words

(iv) What percentage of cases of cardiovascular disease occurring in engineers are caused by engineering?

A study enrolled all persons aged 50 years or older who were diagnosed with the cardiovascular disease between January 1, 2000, and December 31, 2005, and whose diagnosis was reported to the local disease registry. Local registries include at least 95% of people with cardiovascular disease in the area. People who were not diagnosed with cardiovascular disease were also included as participants in the study. They were selected by calling people aged 50 years or older who were randomly selected from a list of cell phone data in the area. It is known that 95% of the local population aged 50 or older has a cell phone. Of the 480 people identified with cardiovascular disease, data were missing for 20% (96) of the random sample. Of the remaining 384 individuals, 336 agreed to participate in the study. 48 who did not agree to participate gave no reason. Of the 800 people without cardiovascular disease who were contacted, 480 agreed to participate in the study. Of the 320 who did not agree, 240 said they did not have the ability to stop working (160 of them were known to work in transportation) and 80 did not give a reason for not agreeing to participate in the study. Of the 336 individuals with cardiovascular disease, 48 reported being engineers. 42 of the 480 individuals without cardiovascular disease reported being engineers