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I would be very grateful if someone could help me with the code for this - I'm reporting the incidence of stroke in patients with diabetes versus no diabetes in 5 year bands, and would like to calculate the P value for trend over time if possible. I've tried the ptrend command but I'm confused...

Hello, I have calculated the crude incidence rates per 1000 population per year of strokes in patients with and without kidney disease e.g.18.37 (16.94-19.9) vs 6.37 (5.78-7.0). How do I calculate the p value for difference? Thanks!

Dear all, I have a population of 2000 patients - all of whom have had a stroke. I have calculated the ORs of the stroke subtypes (there are 7 subtypes) according the presence or absence of kidney disease. However, some of the results don't really make sense and kidney disease appears to be...

Hi, I have a table of baseline characteristics of a cohort in which I have compared the differences between those with kidney disease and those without, using a combination of Chi-square test, t-test, or Kruskall-Wallis test as appropriate. How do I age-adjust the P values that I get from these...

Hello, I have a large sample of patients who have had a TIA, minor stroke or major stroke. I have been looking at correlations in each of these three groups. Is there a statistical test in SPSS (or elsewhere) that would allow me to compare the correlation coefficients between each of three...

Using SPSS, in preparation for correlation analysis, apart from scatterplots, is there a formal statistical test for linearity for two continuous variables? Someone suggested using Analzye -> Compare means -> Means -> under options, test for linearity? Is that the best test for this purpose...

Should Iog-transform variables for correlation if they aren't normally distributed even if I'm using a non-parametric test for correlation? And if so, why? Thanks for your help!