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Re: Reproductive calendar [message #2203 is a reply to message #2202] Mon, 26 May 2014 11:41 Go to previous messageGo to previous message
kash is currently offline  kash
Messages: 5
Registered: December 2013
Location: Pretoria
Member
RHS,
Following our discussions, this is how I derive, in STATA, the duration to first pregnancy since the start of the reproductive calendar. I hope other users could find it useful or improve on it.
------------------------------------------------------------ ----------------------------
di length(vcal_1) /*length is 80*/
format %80s vcal_1
local i=1
forvalues n= 80(-1)1{
gen str1 mcont`i' = substr(vcal_1,`n',1)
local ++i
}
reshape long mcont, i(caseid) j(event_time)
by caseid, sort: egen fecund = min(cond(mcont == "P", event_time,.))
------------------------------------------------------------ --------------------
Best regards,
Kash
 
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