How often did having trouble falling asleep happen:Find:Pt:^Patient:Ord:QIDS
how often did having trouble falling asleep happen:find:pt:^patient:ord:qids
How often did having trouble falling asleep happen:Finding:To identify measures at a point in time:^Patient:Ordinal:QIDS
how often did having trouble falling asleep happen:finding:to identify measures at a point in time:^patient:ordinal:qids