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rqayyum

Re: can you calculate it for me

In addition to Dr. Siddiqui, I am also interested in knowing some magic.

My favorite software is PS: Power and sample Size Calculator. It is available free of charge at http://biostat.mc.vanderbilt.edu/twiki/bin/view/Main/PowerSampleSize

There are some nice reference articles on this page.

However, knowing how to use a software doesn't mean that you will be calculating correct sample size. You either need to know sample size calculation well or need to work closely with a biostatistician.

M. Afzal

Re: can you calculate it for me

hi dear,

the calculation of sample size u are asking for can not be calculated on the basis of information u r giving, as it depends on ur objective and study design i will recomend you to consult cpsp regional centre for actual and proper calculation
or u can get help from 03224053157 in Islamad /Rawalpindi,
and anyone can get help regarding synopsis, research article and dissertation writing and data analysis for any purpose.

siddiqi

Re: Re: can you calculate it for me

"Your sample size is 139 patients using the following information, at 1% prevalence, 5% level of significance and 5 % precision"

BioStat:
Can you explain how you got to that magical number?

[Edited by siddiqi on 08-10-2009 at 05:15 PM GMT]

drrathore

Re: Re: can you calculate it for me

Dear Sir

Can you please give me a link to download this software...I tried to Google it out but couldn't find any download links

Regards

Farooq

docosama

Re: can you calculate it for me

WHO "Sample Size Determination in Health Studies" software

Good small software with examples ... esp. designed for users like us.