Efficacy of a patient-training videotape on motor fluctuations for on-off diaries in parkinson's disease

Patient on‐off diaries are used in clinical trials, but a method to assure agreement between patient and examiner has never been developed. We tested whether a patient‐teaching tape increased the rate of agreement between patient diary ratings and simultaneous neurologic assessment by a trained professional. A total of 32 consecutive patients who had Parkinson's disease with motor fluctuations independently completed a 4‐h on‐off diary (nine ratings) at the same time as an examiner. Those with