Experimental user under care - Feature extraction window

[Ak784]

Hello,

thanks for this tool. I read the Aphrodite documentation and found that it has 2 modes for Feature extraction which are denoted as 1 and 2 in settings.R file

1 - From first keyword appearance to last keyword appearance (entire EHR duration)

Q1) Let's say a person is diagnosed with AMI on Apr 1st, 2005 and his last record on our EHR dataset is Dec 10, 2015. So, we get all the features of his (lab, procedures, drugs etc) as frequency till his last record in EHR. This is clear and I understand

Q2) But for mode 2, where you look at 10 years of his past history (from date of 1st keyword appearance) to EXPERIMENTAL USER UNDER CARE

Here, I didn't understand what did you mean by EXPERIMENTAL USER UNDER CARE? Would you be able to help us understand this? does it mean we can configure like 2 years, 3 years from 1st keyword appearance?