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st: Meta-Analysis of Hazard Ratios and Confidence Intervals
From
Belinda Butcher <[email protected]>
To
[email protected]
Subject
st: Meta-Analysis of Hazard Ratios and Confidence Intervals
Date
Wed, 19 Sep 2012 10:03:13 +1000
Hi,
I am conducting a meta-analysis of some cancer data using the hazard ratio for overall survival and the upper and lower 95% confidence intervals.
I am using the following command in STATA MP v11 for Mac.
--metan oshr osll osul, effect ("Hazard Ratio") fixed lcols(study author year treatment) double by(drug) null(1) --
However, in the output, I get
Significance test(s) of ES=0
Drug Type A z= 21.53 p = 0.000
Drug Type B z= 25.27 p = 0.000
Drug Type C z= 4.44 p = 0.000
Overall z= 33.43 p = 0.000
I need to compare the ES to 1 not zero, as the relative risk =1 is the point of no difference (not 0). I can't seem to find how to do this.
Your help is greatly appreciated.
Kind regards,
Belinda Butcher BSc(Hons) MBiostat PhD
Director - Biostatistics & Medical Writing
WriteSource Medical Pty Ltd
PO Box 1521
Lane Cove NSW 1595
M: 0418 286 014
E: [email protected]
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