I am analyzing a dataset (n=38, total 4 groups (3 groups of 10 each and 8 controls)) on occurance of a specific condition and its duration. I do have multiple episodes of the condition and varying duration, and its is different in each of the groups, the duration is not normlly distributed. I am interested to see whether there is any significant difference between the groups?
Is it okay to go for the npregress series analysis? How do i interpret the results from npregress series?