which test for trend?

Posted by AB365 on Jan 14, 2011; 9:01pm
URL: http://spssx-discussion.165.s1.nabble.com/which-test-for-trend-tp3341921.html

Hi
I am afraid I have a pretty basic question, but I just can't seem to find an exact answer that I am happy with. It's the usual thing - which test to use? I have some antimicrobial resistance surveillance data (i.e. X% E. coli resistant to ampicillin) for 7 points of time (the month of February for 7 consecutive years), and I just want to test whether proportion resistance is increasing or not. From my (very rusty) statistics knowledge I would have tried a Chi-squared test for trend, however when I went to go and confirm for myself that this is the correct test to use .. I found myself more confused than ever..
Any help appreciated, apologies if this has been answered already
Aline