Outdoor activity^8 weeks pre symptom onset or diagnosis:PrThr:Pt:^Patient:Ord
outdoor activity^8 weeks pre symptom onset or diagnosis:prthr:pt:^patient:ord
Outdoor activity^8 weeks pre symptom onset or diagnosis:Presence or Threshold:To identify measures at a point in time:^Patient:Ordinal
outdoor activity^8 weeks pre symptom onset or diagnosis:presence or threshold:to identify measures at a point in time:^patient:ordinal