Fig. 3: Change in participant-reported symptoms after single sessions of hypoxic conditioning.
From: Hypoxic conditioning in Parkinson’s disease: randomized controlled multiple N-of-1 trials

Change in the participant-selected symptom (usually the most prominent Parkinsonian symptom (A), urge to take dopaminergic medication (B) and global symptom impression (C). Three symptom scales were rated on a 10-point Likert scale pre- and post-intervention. The delta between the pre-intervention measurement and all subsequent post-intervention assessments is depicted in these figures. 0 min is the first post-intervention assessment, taken directly after the intervention, then 30 min post intervention, et cetera, until the last measurement 3 days post intervention.