I think that you may want to point out observations/work through a couple examples of exactly what this means: 1) first episode = start with first symptom day and end when there is a gap of 2 or more days but minimum of 15 days • This is a symptom dataset so first episode starts when SYMPDAY = 0 for all subjid and it will continue for 15 days doesn’t matter if what’s a gap. If we have symptoms on sympday 0, 1,2,3,5,8,10,12,13,15,16,17,20 then the first episode will be until SYMPDAY 17 and the second episode will start on SYMPDAY 20. The second episode will be for at least 15 days (20+15=35) regardless of the gap. So, if we have symptoms on day 35,36,37,44 then the second episode will be until day 37 and the third episode will start on day 44. Do you actually already have values for those variables Sympday and Episode? If not you need to point that out that you actually need help calculating Sympday (and maybe a few more rules about how) • Yes, I have valued for SYMPDAY but not EPISODE. If the minimum is 15 then exactly where does the 2 days actually come into play. Doesn't make much sense to me on the surface why the "2 or more" is included. • I explained this above. Is this supposed to per value of Param? Not at all mentioned why Param is included. • We can ignore param. You should include something that is "not an episode" as well. • All observations must have episodes because this dataset includes only observations with positive symptoms. I hope this helps. Thank you!
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