Exactly right on the odds ratio, but another caution: you can't go from odds ratio to "times more likely" as easily as you can with risk ratio. Remember that if you do odds ratio on the roll of two dice, where one or two count as hits for the first but only one is a hit for the second, your odds ratio will actually be 2.5 (2:4 over 1:5). In reality, though, the event is only twice as likely, not 2.5 times as likely.UTF-8 U+6211 U+662F wrote:Breast Cancer and Calcium Tablets:
Cases Controls
Exposed 70 25
Unexposed 30 75
Odds of exposure of cases = 70/30 = 2.3
Odds of exposure of non-cases = 25/75 = .33
Odds Ratio = Odds of exposure of cases/Odds of exposure of non-cases= 2.3/.33 = 6.97
The odds of exposure to calcium tablets of cases-patients was 6.97 times those of controls, therefore, case-patients were 5.97 times more likely to have used calcium tablets than controls (not sure how accurate that is).
Odds ratio = OR = ad/bc, calculates correlation, not direct causation (I'm not trying to criticize anyone here).
Relative risk = RR = AR for exposed/AR for unexposed = [a/(a+b)]/[c/(c+d)], measures the relative risk of a specific exposure
Hope that helped!
Disease Detectives B/C
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Re: Disease Detectives B/C
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Re: Disease Detectives B/C
You should do representatives for each group of illnesses.
Food-borne: Salmonellosis, E. coli infections, etc.
Water-borne: Giardiasis, Cholera, etc.
Airborne: Tuberculosis, Measles, etc.
Sexual: Hepatitis, Herpes, Cervical Cancers, etc.
Mosquito-borne: Malaria, Yellow Fever, etc.
Tick-borne: Lyme disease, etc.
Food-borne: Salmonellosis, E. coli infections, etc.
Water-borne: Giardiasis, Cholera, etc.
Airborne: Tuberculosis, Measles, etc.
Sexual: Hepatitis, Herpes, Cervical Cancers, etc.
Mosquito-borne: Malaria, Yellow Fever, etc.
Tick-borne: Lyme disease, etc.
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Re: Disease Detectives B/C
Is there a good place where I could find (somewhat) comprehensive lists of each type? I've found one for foodbourne on the CDC website, but idk if it's accurate.UTF-8 U+6211 U+662F wrote:You should do representatives for each group of illnesses.
Food-borne: Salmonellosis, E. coli infections, etc.
Water-borne: Giardiasis, Cholera, etc.
Airborne: Tuberculosis, Measles, etc.
Sexual: Hepatitis, Herpes, Cervical Cancers, etc.
Mosquito-borne: Malaria, Yellow Fever, etc.
Tick-borne: Lyme disease, etc.
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Re: Disease Detectives B/C
Sample tests would be great places. Start on the test exchange and e x p a n d. <--Fibonacci Spaces!!!SOnerd wrote:Is there a good place where I could find (somewhat) comprehensive lists of each type? I've found one for foodbourne on the CDC website, but idk if it's accurate.UTF-8 U+6211 U+662F wrote:You should do representatives for each group of illnesses.
Food-borne: Salmonellosis, E. coli infections, etc.
Water-borne: Giardiasis, Cholera, etc.
Airborne: Tuberculosis, Measles, etc.
Sexual: Hepatitis, Herpes, Cervical Cancers, etc.
Mosquito-borne: Malaria, Yellow Fever, etc.
Tick-borne: Lyme disease, etc.
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Re: Disease Detectives B/C
EDIT: Oops! Haha! That's supposed to be times more likely. Happy now?Flavorflav wrote:Exactly right on the odds ratio, but another caution: you can't go from odds ratio to "times more likely" as easily as you can with risk ratio. Remember that if you do odds ratio on the roll of two dice, where one or two count as hits for the first but only one is a hit for the second, your odds ratio will actually be 2.5 (2:4 over 1:5). In reality, though, the event is only twice as likely, not 2.5 times as likely.UTF-8 U+6211 U+662F wrote:Breast Cancer and Calcium Tablets:
Cases Controls
Exposed 70 25
Unexposed 30 75
Odds of exposure of cases = 70/30 = 2.3
Odds of exposure of non-cases = 25/75 = .33
Odds Ratio = Odds of exposure of cases/Odds of exposure of non-cases= 2.3/.33 = 6.97
The odds of exposure to calcium tablets of cases-patients was 6.97 times those of controls, therefore, cases were highly associated with calcium tablets.
Odds ratio = OR = ad/bc, calculates correlation, not direct causation (I'm not trying to criticize anyone here).
Relative risk = RR = AR for exposed/AR for unexposed = [a/(a+b)]/[c/(c+d)], measures the relative risk of a specific exposure
Hope that helped!
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Re: Disease Detectives B/C
Hey Division C'ers, are you guys putting z and t tables on your sheet? Or would the event supervisor provide those if needed?
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Re: Disease Detectives B/C
My guess is they would provide them if needed....mnstrviola wrote:Hey Division C'ers, are you guys putting z and t tables on your sheet? Or would the event supervisor provide those if needed?
I would memorize the important Z ones, like 1.96 for 95%, but T is hard because of the different DFs.
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Re: Disease Detectives B/C
Hey Guys, a few more questions about modes of transmissions.
I'm making a list with each mode of transmission on my notes, and listing diseases under each. What are all the "categories" I should have?
So far, there is: Food-Bourne, Water-Bourne, Airborne, Sexual, Mosquito-Borne, Tick-Borne, and Droplet.
With Direct and Indirect contact, are there certain modes of transmission (listed above ^) that are 'sub categories' of indirect and direct contact? For example, would all STDs be considered direct contact, all food/water borne be considered indirect?
Thanks
EDIT- Also, what mode of transmission would Athlete's Foot fall under?
I'm making a list with each mode of transmission on my notes, and listing diseases under each. What are all the "categories" I should have?
So far, there is: Food-Bourne, Water-Bourne, Airborne, Sexual, Mosquito-Borne, Tick-Borne, and Droplet.
With Direct and Indirect contact, are there certain modes of transmission (listed above ^) that are 'sub categories' of indirect and direct contact? For example, would all STDs be considered direct contact, all food/water borne be considered indirect?
Thanks
EDIT- Also, what mode of transmission would Athlete's Foot fall under?
Ento is Lyfe. Ento. Bugs. Insects.
I didn't choose the Bug Lyfe, the Bug Lyfe chose me.
Live and die for Teh Insectz.
Ento List Page
"Insects won't inherit the earth- they own it now." -Thomas Eisner, Entomologist
"No one can truly be called an entomologist , sir; the subject is too vast for any single human intelligence to grasp". -OW Holmes
2015 National Ento Bronze Medalist
2018 National Herpetology Bronze Medalist
2019 Herpetology National Champion
User Page
I didn't choose the Bug Lyfe, the Bug Lyfe chose me.
Live and die for Teh Insectz.
Ento List Page
"Insects won't inherit the earth- they own it now." -Thomas Eisner, Entomologist
"No one can truly be called an entomologist , sir; the subject is too vast for any single human intelligence to grasp". -OW Holmes
2015 National Ento Bronze Medalist
2018 National Herpetology Bronze Medalist
2019 Herpetology National Champion
User Page
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Re: Disease Detectives B/C
Athlete's foot: Direct Contact, Fomites, etc.SOnerd wrote:Hey Guys, a few more questions about modes of transmissions.
I'm making a list with each mode of transmission on my notes, and listing diseases under each. What are all the "categories" I should have?
So far, there is: Food-Bourne, Water-Bourne, Airborne, Sexual, Mosquito-Borne, Tick-Borne, and Droplet.
With Direct and Indirect contact, are there certain modes of transmission (listed above ^) that are 'sub categories' of indirect and direct contact? For example, would all STDs be considered direct contact, all food/water borne be considered indirect?
Thanks
EDIT- Also, what mode of transmission would Athlete's Foot fall under?
Food-Borne + Water-Borne = via a medium
Mosquito-Borne + Tick-Borne = Vector Transmission
Please Google:
Direct transmission,
Indirect transmission
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