Hi list,
I am trying to calculate the sensitivity, specificity, and odds ratio(and
confidence interval).
Say, my data looks like this
42.53, 37.56, 40.51, 32.67, 38.19, 81.74, 41.55, 68.94, 59, 63, 54.13,
48.85, 50.46, 51.78
Is there any packages in R that does this? Espeically the odds ratio
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
project.org] On Behalf Of C W
Sent: Tuesday, August 14, 2012 11:18 AM
To: r-help
Subject: [R] What package to use to calculate odds ratio and the
confidence interval?
Hi list,
I am trying to
Suppose my results comes out like this,
40%
40%
Total
No disease
131
75
206
Have disease
27
6
33
239
My odds ratio: 27/(27+131))/(131/(27+131)) = 0.206
I want to calculate the confidence interval for it.
Mike
On Tue, Aug 14, 2012 at 2:52 PM, Nordlund, Dan (DSHS/RDA)
The table did not come out on rich text format.
So what I wrote was,
40%40% Total
No disease 131 75 206
Have diease 27 6 33
239
My odds ratio: 27/(27+131))/(131/(27+131)) = 0.206
I am
This is not an odds ratio. You simply calculated 27/131 = .206, which is the
odds of having the disease given 40%. You can calculate a confidence interval
for this with:
exp(log(27/131) - 1.96 * sqrt(1/27 - 1/(27+131)))
exp(log(27/131) + 1.96 * sqrt(1/27 - 1/(27+131)))
which yields (0.146,
What you presented below is not an odds ratio, but simply the odds of disease
when some measure is less than 40%. But you can use the oddsratio() function
from the epitools package to do the calculations that you want.
Hope this is helpful,
Dan
Daniel J. Nordlund
Washington State Department
Hi,
Please check this link:
http://www.r-bloggers.com/computing-odds-ratios-in-r/
Also,
http://rgm2.lab.nig.ac.jp/RGM2/func.php?rd_id=HH:odds.ratio
A.K.
- Original Message -
From: C W tmrs...@gmail.com
To: r-help r-help@r-project.org
Cc:
Sent: Tuesday, August 14, 2012 2:18 PM
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