Help: OS, HR and CI 95%

[Fra Cori]

Good morning guys, I need some clarification about overall survival, hazard ratio and C.I.95%.
I would like to do a meta-analysis comparing the upper and lower CI of OS or HR of several studies, the issue is that for all the correlated studies that I found, they report the OS or HR and the p value (naturally I don't have the entire data set).
So my questions are:
1. Could I calculate OS from HR (and the opposite)?
2. Could I calculate the C.I. 95%, if I have only OS/HR and the total of the predictors?
In order to be more clear, here is an example for the question #1:
-OS=55,3%;
-CI 95%=76,7-90,2;
-p<0,001
-n=176
(HR?).
Example for question #2:
-OS=60,6%;
-P<0,001;
-n=1920
(C.I.95%?).
Thanks for the help.

[William Lisowski]

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