st: Measuring the reliability of a questionnaire

[Cristian Pattaro <cristian@biometria.univr.it>]

Hi all!

I'm studying the reliability of a questionnaire over the time. I have adminstered the same questionnaire the first time and then the second time, 10 years apart. Both categorical and continuous response variables are considered. I need a measure of the stability of the questions over the time.

Does anybody know if there is any implemented Stata command for  
- obtaining Kappa confidence intervals
- performing an homogeneity test within M Kappas from M independent populations
- calculating the Bennett's S statistics for Stability?

Any other suggestion?

Many thanks!
Cristian

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Cristian Pattaro
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Unit of Epidemiology & Medical Statistics
Department of Medicines and Public Health
University of Verona

cristian@biometria.univr.it
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