I have a question about illustrate amount of change in atlas.
First, I’ve defined cohort who has a change in Hba1c record after prescription of medicine A (era length 90 days)
initial event : Medicine A era length 90 days
inclusion criteria :
a Measurement of HbA1c record with value as number greater than 6.5
event starts between all days before and 0 days before index start date.
a Measurement of HbA1c record with value as number less or equal to 6.5
event starts between 30 days after and 60 days after index start date.
However what I want to know is “Is there 0.5 of changes after eating medicine A?” . So my way could capture wrong case like 6.7 to 6.4 ( changes < 0.5 ) or couldn’t capture right case like 7.1 to 6.6 (changes = 0.5) !!
Therefore, Is there a way to represent a criteria in which the difference between the first and second records is more than 0.5 in atlas?