Disease Detectives B/C

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Re: Disease Detectives B/C

Postby mc408 » March 12th, 2017, 1:29 pm

Skink wrote:I find the CDC online book inadequate, but, more to the point, the print book I own is inadequate, too. This event really hits two different topics: epidemiology and <i>biostatistics</i>. You really need something for both. Well, then there's the topical stuff, which may be a third arm...I don't think you'll find everything under one roof anywhere.


What else do you recommend for practice material?
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Re: Disease Detectives B/C

Postby Abekitt » March 14th, 2017, 12:01 pm

mc408 wrote:
Skink wrote:I find the CDC online book inadequate, but, more to the point, the print book I own is inadequate, too. This event really hits two different topics: epidemiology and <i>biostatistics</i>. You really need something for both. Well, then there's the topical stuff, which may be a third arm...I don't think you'll find everything under one roof anywhere.


What else do you recommend for practice material?

I would say find a test that base off analysis and practice on that for sure. Seeing how to repond to multiple situations and even what kind of statistics method you would use could be very beneficial for you. Also, do some research on the food borne illness chart thats on the soinc.org disease section (at least thats where I think it is, and see what kind of organism it is and know overall information on it.
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Re: Disease Detectives B/C

Postby Nerd_Bunny » April 3rd, 2017, 11:03 am

Does anyone know of a good link to practicing calculation of risk, odds ratio, and other math we'll need to know? A worksheet would be fine too.
Events: Chemistry Lab, A&P, Disease Detectives
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States/Nationals
RFTS: 1/37
DD: 1/16
A&P:1/31
Ecology: -/59 haha I bet you can guess what happened here...

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A&P: 1/1/
Chem Lab: 5/1/
DD: 1/1/

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Re: Disease Detectives B/C

Postby Unome » April 11th, 2017, 1:37 pm

Should I expect to see much in the way of disease knowledge questions on the nationals test? I keep encountering them and doing badly, but I don't want to spend time on that if it probably won't show up.
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Re: Disease Detectives B/C

Postby Nerd_Bunny » April 11th, 2017, 2:24 pm

Unome wrote:Should I expect to see much in the way of disease knowledge questions on the nationals test? I keep encountering them and doing badly, but I don't want to spend time on that if it probably won't show up.

At my state tournament, we didn't have any disease questions. But I think they will probably have them at nationals. I found a list of diseases at sonic.org made by the CDC and am currently studying those for nationals. Studying just those is probably good enough, I think they're the most common food borne illnesses.
Events: Chemistry Lab, A&P, Disease Detectives
2017 Placings
States/Nationals
RFTS: 1/37
DD: 1/16
A&P:1/31
Ecology: -/59 haha I bet you can guess what happened here...

2018 Placings
NEBO/States/Nationals
A&P: 1/1/
Chem Lab: 5/1/
DD: 1/1/

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Re: Disease Detectives B/C

Postby Alex-RCHS » April 11th, 2017, 6:26 pm

Unome wrote:Should I expect to see much in the way of disease knowledge questions on the nationals test? I keep encountering them and doing badly, but I don't want to spend time on that if it probably won't show up.


IIRC the nats test last year didn't have many disease questions. Rather, it was a few long case scenarios. Some of those case scenarios asked about a specific disease, but by far most of the points came from other stuff.

That being said, I only saw about a third of the test, because my partner and I split it up.
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Re: Disease Detectives B/C

Postby maxxxxx » April 26th, 2017, 4:04 pm

Are volunteer bias and self-selection bias two different things? They seem like the same thing to me but I'm not 100% sure.
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Re: Disease Detectives B/C

Postby Tailsfan101 » May 2nd, 2017, 11:25 am

Unome wrote:Should I expect to see much in the way of disease knowledge questions on the nationals test? I keep encountering them and doing badly, but I don't want to spend time on that if it probably won't show up.

I encountered one on a practice test, and was totally clueless, but luckily I had none at state. Nationals will most likely include them, I would suggest using Nerd_Bunny's suggestion, or I found this link: https://www.fda.gov/downloads/Food/Food ... 187482.pdf
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Re: Disease Detectives B/C

Postby Unome » May 9th, 2017, 11:59 am

I seem to be messing up a lot on problems asking for possible remediation methods. Does anyone know how I would go about preparing for those?
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Re: Disease Detectives B/C

Postby maxxxxx » May 9th, 2017, 1:42 pm

Unome wrote:I seem to be messing up a lot on problems asking for possible remediation methods. Does anyone know how I would go about preparing for those?


I might be remembering wrong but I think in Chapter 6 of Principles of Epi they cover remediation. Although I have seen answers on tests that are slightly different than what's in the textbook, either it's too much common sense or too much obscure prevention measures.
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Re: Disease Detectives B/C

Postby Nerd_Bunny » May 9th, 2017, 6:12 pm

So at my state tournament, (Idaho,) my partner and I got a question that neither one of us knew. The first part asked what the sensitivity was, and the second part I can't remember. So my question is, what other term could it have been asking for? I think it started with an 's' as well, but I'm not sure. Looking through my textbook glossary, I think it could have been severity, but I'm not sure. If anyone could help me out here, it would be much appreciated. Thanks!
Events: Chemistry Lab, A&P, Disease Detectives
2017 Placings
States/Nationals
RFTS: 1/37
DD: 1/16
A&P:1/31
Ecology: -/59 haha I bet you can guess what happened here...

2018 Placings
NEBO/States/Nationals
A&P: 1/1/
Chem Lab: 5/1/
DD: 1/1/

If you're curious...yes, I like rabbits.

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Re: Disease Detectives B/C

Postby JoJoKeKe » May 9th, 2017, 6:36 pm

Nerd_Bunny wrote:So at my state tournament, (Idaho,) my partner and I got a question that neither one of us knew. The first part asked what the sensitivity was, and the second part I can't remember. So my question is, what other term could it have been asking for? I think it started with an 's' as well, but I'm not sure. Looking through my textbook glossary, I think it could have been severity, but I'm not sure. If anyone could help me out here, it would be much appreciated. Thanks!


It's been a while since I've done Disease Detectives but I think I can help you.

Sensitivity is basically the chance of having a specific disease given that you have a disease. It can be calculated as:

Sensitivity = Number of disease positives testing positive / Number of people with a disease who test positive for a particular disease + number of people with a disease who test negative.

Conversely, another term closely related is specificity (is this the word that you couldn't remember?) This is basically the reciprocal idea, but I think it is more of an emphasis on not having a disease and also testing negative.

Specificity = number of people who test negative and don't have a disease / number of people who test negative and don't have a disease + number of people who don't have a disease but test positive

Gosh-- I'm surprised that the Idaho competition even got that difficult. For the past few years the Disease Detectives test has been fairly easy at state (or if you were there in 2016 it had literally nothing to do with the event)

Hope this helps, and if you have any other questions, feel free to PM me.
Tournaments (2016): State / Nationals
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Re: Disease Detectives B/C

Postby Nerd_Bunny » May 9th, 2017, 9:59 pm

JoJoKeKe wrote:
Nerd_Bunny wrote:So at my state tournament, (Idaho,) my partner and I got a question that neither one of us knew. The first part asked what the sensitivity was, and the second part I can't remember. So my question is, what other term could it have been asking for? I think it started with an 's' as well, but I'm not sure. Looking through my textbook glossary, I think it could have been severity, but I'm not sure. If anyone could help me out here, it would be much appreciated. Thanks!


It's been a while since I've done Disease Detectives but I think I can help you.

Sensitivity is basically the chance of having a specific disease given that you have a disease. It can be calculated as:

Sensitivity = Number of disease positives testing positive / Number of people with a disease who test positive for a particular disease + number of people with a disease who test negative.

Conversely, another term closely related is specificity (is this the word that you couldn't remember?) This is basically the reciprocal idea, but I think it is more of an emphasis on not having a disease and also testing negative.

Specificity = number of people who test negative and don't have a disease / number of people who test negative and don't have a disease + number of people who don't have a disease but test positive

Gosh-- I'm surprised that the Idaho competition even got that difficult. For the past few years the Disease Detectives test has been fairly easy at state (or if you were there in 2016 it had literally nothing to do with the event)

Hope this helps, and if you have any other questions, feel free to PM me.


Thank you! This helps a lot. I was there last year- I got silver. Yeah, it really didn't have anything to do with the event.
Events: Chemistry Lab, A&P, Disease Detectives
2017 Placings
States/Nationals
RFTS: 1/37
DD: 1/16
A&P:1/31
Ecology: -/59 haha I bet you can guess what happened here...

2018 Placings
NEBO/States/Nationals
A&P: 1/1/
Chem Lab: 5/1/
DD: 1/1/

If you're curious...yes, I like rabbits.

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Re: Disease Detectives B/C

Postby Nerd_Bunny » May 15th, 2017, 7:05 pm

Anyone know of a place where I could find some Division B practice tests? The test exchange has none. :(
Events: Chemistry Lab, A&P, Disease Detectives
2017 Placings
States/Nationals
RFTS: 1/37
DD: 1/16
A&P:1/31
Ecology: -/59 haha I bet you can guess what happened here...

2018 Placings
NEBO/States/Nationals
A&P: 1/1/
Chem Lab: 5/1/
DD: 1/1/

If you're curious...yes, I like rabbits.

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Re: Disease Detectives B/C

Postby efeng » May 15th, 2017, 8:00 pm

Your best bet is trying to contact your high school's Division C, and ask if they have a test exchange. I don't think there is a lot of that for Division B, it is super common in Div C (to my knowledge. Other than that, you could buy past nationals tests. However, that's about it.
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