Power calculation for repeated measure count data - single group

I found this query from someone in Australia in a discussion group. 

Subject: Power for repeated measure count data - single group
To: anzstat@lists.uq.edu.au


Hello listmembers

I was looking for references to compute sample size for count data in a repeated measure observational (single group) study. For example, a cohort of people will be followed on 'x' occasions over a period of 'y' years to investigate number of falls over the time period.  Any help will be greatly appreciated.

Many thanks

Asad Khan
University of Queensland

This is a difficult question to really answer. 

First, resources:

1) Steve simon runs a great set of pages called pmean (http://www.pmean.com/). He even discussed a two sample scenario with two different population comparing test trends but not exactly this problem

2) Here is a list of power calculators (online) http://statpages.org/#Power

3) Anotehr interesting article, http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1662068/?tool=pubmed

4) 
Brisbane

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