Re: Disease Detectives B/C
Posted: April 2nd, 2014, 4:07 pm
Would any of you know how to calculate the incubation period using an epi curve?
Science Olympiad Student Center
Epidemiologists deal with population while clinicians (doctors, etc.) deal with individuals.Sodium_ wrote:state is coming up saturday and i have a few last minute questions!
- what do and don't epidemiologists deal with? ( just a refresher )
- any good last minute links to cram? already checked out a lot like scioly and cdc
- in my experience, the state test didnt give an outbreak which we had to solve for, other than the attack rate, odds ratio etc. does anyone know if they do that in Socal or the state you are in? All i pretty much got last year was a multiple choice test with a few other things.
I'm not sure I understand your question. I've never heard of the 1/4-1/3-inc per rule you are talking about although I can see that it may make some sense for some uses. OTOH - the inc period for flu is fairly short (1-3 days) yet most epicurves for flu use 1-week cuts for the X-axis. It would seem to me that the raw data should be collected as precisely as reasonably possibie (time of day by hour for very short outbreaks, day for longer ones) but their graphical representation can vary. The tractor death graphs in CDCs Principles of Epi are a good example of how different X-axes can show different things.scio444 wrote:Okay, so on epi-curves- I know that the unit of time should be 1/3-1/4 of the typical incubation period. But I have been noticing that only multiplying the time unit by 3 is giving me an incubation period that falls within the range on the answer keys. Any thoughts on this? What numbers do you guys use?
Do you mean the amount of tick marks on your histogram/epi curve?inluvwyth_WANTED wrote:I have heard of this rule but I didn't know how to do it so I always just graphed it according to the different cases.
When i got my test back (from invites) it was correct so...
What is the "correct" way to graph the x-axes? Please help and thanks!