Walking - outdoors - difficulty - score change:ScoreDiff:Pt:^Patient:Qn:OPTIMAL
walking - outdoors - difficulty - score change:scorediff:pt:^patient:qn:optimal
Walking - outdoors - difficulty - score change:ScoreDiff:Pt:^Patient:Qn:OPTIMAL
walking - outdoors - difficulty - score change:scorediff:pt:^patient:qn:optimal