Hi,

I have a study population of 400 patients in which GFR values have been measured at 0, 3 and 6months during follow up. I also have values of various clinical parameters at the same follow-up period like serum potassium, creatinine, urea, BP etc. Further I have the data of the drug use as well.

I intend to measure the clinical outcomes in terms of changes in GFR values and I want to determine the factors which are related to decline in GFR.

I have two questions:

1) What tests should I conduct? Specially how can I make use of the 3rd month value because for various tests the baseline and final value is used for description purposes.

2) How to represent such associations or changes in trend through graphical representation. What exact type of graph should be prepared?