EBM Stats


New Member
Hi everyone - my first post!

Was wondering if anyone could help me. I am doing a project on the outcomes of a particular type of eye surgery (cataract surgery). I have lots of data on the measurements before surgery and the measurements after surgery. Can anyone advise me what stat tests I should use to compare the change in these measurements? Should I be calculating the mean, SD, variance, range for all results? Should I do a t-test or confidence intervals or both? When should relative risk reduction, absolute risk reduction, no needed to tx and odds ratio be calculated?

Would appreciate any help you can give me.