Hi,

I have data similar to the format below

id group wk1 wk2 wk3 wk4 wk5 1 1 1 1 1 0 . 2 1 0 . 1 0 0 4 2 0 1 1 1 1 5 2 0 0 . 0 0

which include the subject id and treatment group. For each subject, a test is done each week (idicate by wk1-wk5) which 1 indicate positive ,0 indicate negative, missing indicate subject did not take the test.

I like to compare the percentage positive between treatment group 1 and 2.

I can plot the percent positive for each week in a graph by plotting the percent over the subjects within a group for each week such as

group wk1 wk2 wk3 wk4 wk5 1 0.50 1.00 1.00 0.00 0.00 2 0.00 0.50 1.00 0.50 0.50

and visually compare them.

I wonder if anyone have worked with data in this format before. Can anyone advice me of a proper significant test I can use in SPSS? Does Repeated Measure applies in this case? Thanks for any advice.

Chunki Fong