During the past 30D, on how many D did you use drugs:NRat:30D:^Patient:Qn:PhenX
during the past 30d, on how many d did you use drugs:nrat:30d:^patient:qn:phenx
During the past 30D, on how many D did you use drugs:Number=Count/Time:30 days:^Patient:Quantitative:PhenX
during the past 30d, on how many d did you use drugs:number=count/time:30 days:^patient:quantitative:phenx