Service Delivery Variables in the Treatment of Voice Disorders Related to Parkinson Disease
Treatment following LSVT® guidelines was provided to participants suffering from Parkinson Disease who were assigned to one of three different treatment schedules: 4 times per week for 4 weeks; 2 times per week for 8 weeks; or 2 times per week for 4 weeks. Measurements taken before treatment, at the end of treatment, and 3 mos. following the end of treatment showed that all participants, regardless of schedule, increased their voice intensity while reading aloud by the end of treatment, and many retained a portion of that increase after 3 months. The schedule of treatment, including the total number of sessions, did not have a predictable effect on the outcomes of the treatment. In general these participants, who were referred from a large urban hospital and did not pay for their treatment, had smaller gains in intensity than have previously been reported. Additional outcome measures including sustained vowel intensity and duration and pitch range, and a variety of measures of disability such as Sickness Impact Profile score and short-term memory performance are discussed relative to individual performance.