Welcome to Disease Detectives B/C 2015! I'll start the questions...
What is the difference between cohort and case-control studies?
Re: Disease Detectives B
Posted: August 22nd, 2014, 6:57 pm
by bernard
For a case-control study, participants are selected on a basis of [i]whether or not they have the disease[/i]; then, they are compared for common exposures to determine if an association exists. For a cohort study, participants are selected on a basis of [i]exposure or no exposure[/i]; then, disease occurrence is compared to determine if an association exists. Choosing a study type depends on what you already know. If there are 3 students who at school lunch last week and 100 cases of salmonella are reported, a case-control would be best because for those 100 cases, you can determine exposure to school lunch (Y/N) and look for an association.
Give two examples of each: 1) vectors, 2) fomites, 3) zoonotic diseases.
Re: Disease Detectives B
Posted: August 27th, 2014, 11:23 am
by hmath729
Yep, your turn!
Re: Disease Detectives B
Posted: August 27th, 2014, 11:25 am
by bernard
Give two examples of each: 1) vectors, 2) fomites, 3) zoonotic diseases.
Re: Disease Detectives B
Posted: August 28th, 2014, 9:47 am
by hmath729
ticks, mosquitoes
Comb, headphones
Lyme disease, salmonellosis
Re: Disease Detectives B
Posted: August 28th, 2014, 10:03 am
by bernard
Correct, your turn!
Re: Disease Detectives B
Posted: August 29th, 2014, 4:15 pm
by hmath729
(I can't think of anything else right now...)
Bob shared his headphones with Joe. Bob then used them again. The next day, Bob was diagnosed with head lice. The headphones are an example of...
Re: Disease Detectives B
Posted: August 29th, 2014, 5:17 pm
by bernard
A fomite!
Re: Disease Detectives B
Posted: September 20th, 2014, 5:27 pm
by hmath729
Correct, your turn.
Sorry it took me so long to reply, I was inactive.
Re: Disease Detectives B
Posted: October 20th, 2014, 8:55 am
by bernard
Define risk difference. Risk difference is the difference in rates of occurrence between exposed and unexposed groups in the population.
