On how many Ds in the last 3Mo did you have a headache, if headache lasted more than 1D, count each D:NRat:3Mo:^Patient:Qn:PhenX
on how many ds in the last 3mo did you have a headache, if headache lasted more than 1d, count each d:nrat:3mo:^patient:qn:phenx
On how many Ds in the last 3Mo did you have a headache, if headache lasted more than 1D, count each D:Number=Count/Time:3 months:^Patient:Quantitative:PhenX
on how many ds in the last 3mo did you have a headache, if headache lasted more than 1d, count each d:number=count/time:3 months:^patient:quantitative:phenx