Speech loudness and quality 12 months after intensive voice treatment (LSVT) for Parkinson's disease: a comparison with an alternative speech treatment

Folia Phoniatr Logop. Nov-Dec 2002;54(6):296-303. doi: 10.1159/000066148.


Thirty-five individuals with idiopathic Parkinson's disease were enrolled in speech treatment. Twenty-two were enrolled in a high-effort phonatory-respiratory treatment program (Lee Silverman Voice Treatment, LSVT) and 13 were enrolled in a high-effort respiratory treatment program (RET). Perceptual judgments of speech loudness and quality were made independently by 6 listeners on recordings of the 'Rainbow Passage'. These recordings had been obtained just before treatment (pre) and at 12 months' follow-up (FU12). The speech samples in the LSVT group, but not in the RET group, were significantly more likely to be perceived 'louder' and 'better quality' at FU12 than at pre (p < 0.0001). These findings, along with others, suggest that the long-term effects of the LSVT are perceptible, clinically significant and treatment-specific.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Female
  • Humans
  • Judgment
  • Male
  • Middle Aged
  • Observer Variation
  • Parkinson Disease / complications*
  • Random Allocation
  • Severity of Illness Index
  • Speech Acoustics*
  • Speech Disorders* / epidemiology
  • Speech Disorders* / etiology
  • Speech Disorders* / therapy
  • Time Factors
  • Voice Quality*
  • Voice Training*