Estimate annual survival from monthly estimates

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Estimate annual survival from monthly estimates

Postby alittle » Wed Apr 08, 2015 1:36 pm

Hi,

My data set is currently structured to estimate monthly survival over a period of 32 months. The monthly survival estimate is 0.96 (SE=0.01). I want to calculate an annual survival estimate, which is calculated by multiplying the survival estimate by 12 months. This yields an estimate of 0.59; however, I'm interested in calculating the standard error, lower and upper confidence limits on this estimate. What is the best approach to derive these values?

Thanks!
alittle
 
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Re: Estimate annual survival from monthly estimates

Postby cooch » Wed Apr 08, 2015 1:41 pm

alittle wrote:Hi,

My data set is currently structured to estimate monthly survival over a period of 32 months. The monthly survival estimate is 0.96 (SE=0.01). I want to calculate an annual survival estimate, which is calculated by multiplying the survival estimate by 12 months. This yields an estimate of 0.59; however, I'm interested in calculating the standard error, lower and upper confidence limits on this estimate. What is the best approach to derive these values?

Thanks!


Delta method - see http://www.phidot.org/software/mark/doc ... /app_2.pdf
cooch
 
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