Sport-recreation score change:ScoreDiff:Pt:^Patient:Qn:KOOS
sport-recreation score change:scorediff:pt:^patient:qn:koos
Sport-recreation score change:Score Difference:To identify measures at a point in time:^Patient:Quantitative:KOOS
sport-recreation score change:score difference:to identify measures at a point in time:^patient:quantitative:koos