For how long have you had at least 1 cough and phlegm episode per Y:Time:Pt:^Patient:Qn:PhenX
for how long have you had at least 1 cough and phlegm episode per y:time:pt:^patient:qn:phenx
For how long have you had at least 1 cough and phlegm episode per Y:Time:To identify measures at a point in time:^Patient:Quantitative:PhenX
for how long have you had at least 1 cough and phlegm episode per y:time:to identify measures at a point in time:^patient:quantitative:phenx