*The sample size for each case group is different

*we have the sample size for each of the groups but not the frequency of exposure (otherwise we could use just the raw data)

Any ideas?

Thanks

- Thread starter amirh899
- Start date
- Tags 95% confidence intervals combining meta analysis odds ratio relative risk

*The sample size for each case group is different

*we have the sample size for each of the groups but not the frequency of exposure (otherwise we could use just the raw data)

Any ideas?

Thanks

Exactly what data do you have, and do you know the program used? It might help to try and recreate the contingency table the best you can.

Thanks

Try to calculate this or contact corresponding author for exact numbers.

Calculation (forgive me, I am not the greatest at stuff like this): I will do the Mild group and let you do Severe group. I would be as exact as possible with decimal places to circum-navigate rounding errors.

You can log base e transform the odds ratio into its beta coefficient from the regression model: 1.56 = 0.4446858

Now you can get the Standard error from the confidence interval: log base e of 1.45 equals 0.3715636, now minus this from from the 0.444 number and divide by 1.96 to get 0.0372449, which is your approximate standard error.

Now do this for severe...

Perhaps others may weigh in (like maartinbuis, who seems good in these matters).

See following: http://stats.stackexchange.com/ques...-pooled-odd-ratios-in-meta-analysis/9495#9495

Hi, thanks a lot. I did not have access to internet last day. I have just seen these. Let me try and I will come back to you soon!

And BTW, I used the data on table 1 which came from univariate analysis.

Good idea using Table 1, this may make these data better for inclusion with other studies in a meta-analysis.