[R] Meta-analysis question

2010-10-08 Thread kende jan
Dear all, I am trying to do meta-analysis of continuous outcome data. Twelve studies are selected but for six of them, i have only p-values and the six other means and standard deviation for the two groups (Experimental and Control). How can I do with R to take into account p-values and/or

Re: [R] Meta-analysis question

2010-10-08 Thread Joshua Wiley
Dear Jan, It depends what you are looking to do. For the studies that have given you means and standard deviations, if you want a d effect size, you should already be set (Mean1 - Mean2)/control standard deviation or the pooled standard deviation if you prefer. For the studies where you just