I was hoping to get some advice over whether I am using the appropriate test for data that I have.

The notes of 70 patients were analysed and 2 variables (documentation of postive symptoms yes/no and negative symptoms yes/no) were noted on 4 occasions.

An intervention was performed (teaching session) and then a second cycle was performed looking at a different set of 35 patient notes.

- From the table of results it is clear that positive symptoms were recorded more frequently than negative symptoms. Would a Chi Square test be the most appropriate to show that this difference was significant.

- What is the best test to see if the intervention was significant? My research suggests a Chi Square test or a form of ANOVA, but would it be best to use the mean frequency (positive symptoms yes/no and negative symptoms yes/no) on each occasion?

- And finally other general factors were recorded Drug use (Yes/No), Illness duration (Less than 5 years or over 5 years) and Level of Person documenting (5 possible outcomes). Would the best solution be a series of Chi-Square analyses to see if this had an effect? Again would it be best to use the mean of each occasion

I have tried to look at previous forums threads and looked through the internet and hopefully am on the right track. But confirmation/alternative advice would be gratefully appreciated.

Many Thanks for any help/advice offered

Dee