@DartRodrigo Hi , Thanks for the quick reply. I am sorry for the unclear explaination, but what i exactly means is:
as you see the data, we have three treatment type in TYPE variable. Now for each Type variable we have different ATC_CODEs. I need to identify the event (SWITCH) , whenever subject changes his treatment type from Lower treatment type( i,e Topical) to Higher treatment group(i,e Non_bio_sys or Biologics) during his treatment period. Same is true for Non_sys_Bio , if Subject changes to Biologics, then it will also consider as Switch. Event is also to be counted whenever subjects changes his ATC_CODEs within his treatment TYPE , ie in case, when Treatment TYPE is "Psorasis" and if Its' ATC_CODE changes , then we have to identify it as SWITCH.
same is true for other treatment arm.
order of treatment: BIOLOGICS> NON_BIO_SYS> TOPICAL.
Hope i am able to clear you doubt. please help. thanks
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