Biology Forum › Community › General Discussion › Odds Ratio??
January 14, 2012 at 5:29 pm #15939TwinkleKParticipant
I know the calculation for "odds ratio" is:
which is then rearranged to:
This is the question:
6) An epidemiological study is undertaken to examine the response of two groups of patients to a new drug
treatment. The results are summarised in the following data tables.
Patient group 1
———- (Positive response)—-(Adverse effects)
Patient group 2
———-(Positive response)—-(Adverse effects)
Treatment—— 16———————– 32
Placebo———–7 ———————– 45
"(a) Calculate the odds ratios for treatment for both of patient groups 1 and 2.
(b) Calculate odds ratio for treatment on aggregated data (i.e. both patient groups combined)"
For (a) I applied the formula and got "1" which seems right, because all the research done say’s so lol.
For (b) I am stuck, because I don’t understand how I would come about placing the numbers into the equation. I have done two equations and both of them I recieved okay numbers (i.e one number above 1 and one under 1) whih is expected but the mthod used is different. I just don’t know what to do 🙁 Can anyone please help?
Thanks in advance x
January 15, 2012 at 5:01 pm #109030TwinkleKParticipant
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