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Comparison of speech and language therapy techniques for speech problems in Parkinson's disease. 2012

Clare P Herd, and Claire L Tomlinson, and Katherine H O Deane, and Marian C Brady, and Christina H Smith, and Catherine M Sackley, and Carl E Clarke
School of Clinical and Experimental Medicine, College of Medical and Dental Sciences, Birmingham, UK. c.e.clarke@bham.ac.uk

BACKGROUND Patients with Parkinson's disease commonly suffer from speech and voice difficulties such as impaired articulation and reduced loudness. Speech and language therapy (SLT) aims to improve the intelligibility of speech with behavioural treatment techniques or instrumental aids. OBJECTIVE To compare the efficacy and effectiveness of novel SLT techniques versus a standard SLT approach to treat Parkinsonian speech problems. METHODS We identified relevant, published prior to 11(th) April 2011, by electronic searches of numerous literature databases including CENTRAL, MEDLINE and CINAHL, as well as handsearching relevant conference abstracts and examining reference lists in identified studies and other reviews. METHODS Only randomised controlled trials (RCT) of one type of speech and language therapy versus another were included. METHODS Two review authors independently extracted data and resolved differences by discussion. RESULTS Six trials involving 159 patients satisfied the inclusion criteria. Data could not be analysed from one trial due to changes in patient numbers and from a second because the data provided were not in a usable format. All trials reported intelligibility measures but a statistically significant result was only reported for the diagnostic rhyme test used in the study of Lee Silverman Voice Treatment -LOUD (LSVT-LOUD) versus a modified version of this therapy (LSVT-ARTIC). In this case a difference of 12.5 points (95% confidence interval (CI) -22.2 to -2.8; P = 0.01) between the mean changes in favour of the LSVT-LOUD group was reported for a speech sample overlaid with Babble noise; this difference was not reproduced for the two additional noise conditions under which the speech samples were assessed. LSVT-LOUD also outperformed LSVT-ARTIC and Respiration therapy (RT) in improving loudness, with a difference in reading a sample text of 5.0 dB (95%CI -8.3 to -1.7; P = 0.003) and 5.5 dB (95% CI 3.4 to 7.7; P < 0.00001) respectively, and a difference in monologue speech of 2.9 dB (95% CI 0.6 to 5.2; P = 0.01) versus RT. CONCLUSIONS Considering the small patient numbers in these trials, there is insufficient evidence to support or refute the efficacy of any form of SLT over another to treat speech problems in patients with Parkinson's disease.

UI MeSH Term Description Entries
D007808 Language Therapy Rehabilitation of persons with language disorders or training of children with language development disorders. Language Training,Therapy, Language,Language Therapies,Language Trainings,Therapies, Language,Training, Language,Trainings, Language
D010300 Parkinson Disease A progressive, degenerative neurologic disease characterized by a TREMOR that is maximal at rest, retropulsion (i.e. a tendency to fall backwards), rigidity, stooped posture, slowness of voluntary movements, and a masklike facial expression. Pathologic features include loss of melanin containing neurons in the substantia nigra and other pigmented nuclei of the brainstem. LEWY BODIES are present in the substantia nigra and locus coeruleus but may also be found in a related condition (LEWY BODY DISEASE, DIFFUSE) characterized by dementia in combination with varying degrees of parkinsonism. (Adams et al., Principles of Neurology, 6th ed, p1059, pp1067-75) Idiopathic Parkinson Disease,Lewy Body Parkinson Disease,Paralysis Agitans,Primary Parkinsonism,Idiopathic Parkinson's Disease,Lewy Body Parkinson's Disease,Parkinson Disease, Idiopathic,Parkinson's Disease,Parkinson's Disease, Idiopathic,Parkinson's Disease, Lewy Body,Parkinsonism, Primary
D004401 Dysarthria Disorders of speech articulation caused by imperfect coordination of pharynx, larynx, tongue, or face muscles. This may result from CRANIAL NERVE DISEASES; NEUROMUSCULAR DISEASES; CEREBELLAR DISEASES; BASAL GANGLIA DISEASES; BRAIN STEM diseases; or diseases of the corticobulbar tracts (see PYRAMIDAL TRACTS). The cortical language centers are intact in this condition. (From Adams et al., Principles of Neurology, 6th ed, p489) Hyperkinetic Dysarthria,Hypokinetic Dysarthria,Scanning Speech,Dysarthosis,Dysarthria, Flaccid,Dysarthria, Guttural,Dysarthria, Mixed,Dysarthria, Scanning,Dysarthria, Spastic,Dysarthoses,Dysarthria, Hyperkinetic,Dysarthria, Hypokinetic,Dysarthrias,Dysarthrias, Flaccid,Dysarthrias, Guttural,Dysarthrias, Hyperkinetic,Dysarthrias, Hypokinetic,Dysarthrias, Mixed,Dysarthrias, Scanning,Dysarthrias, Spastic,Flaccid Dysarthria,Flaccid Dysarthrias,Guttural Dysarthria,Guttural Dysarthrias,Hyperkinetic Dysarthrias,Hypokinetic Dysarthrias,Mixed Dysarthria,Mixed Dysarthrias,Scanning Dysarthria,Scanning Dysarthrias,Scanning Speechs,Spastic Dysarthria,Spastic Dysarthrias,Speechs, Scanning
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013065 Speech Intelligibility Ability to make speech sounds that are recognizable. Intelligibilities, Speech,Intelligibility, Speech,Speech Intelligibilities
D013070 Speech Therapy Treatment for individuals with speech defects and disorders that involves counseling and use of various exercises and aids to help the development of new speech habits. Therapy, Speech,Speech Therapies,Therapies, Speech
D015982 Bias Any deviation of results or inferences from the truth, or processes leading to such deviation. Bias can result from several sources: one-sided or systematic variations in measurement from the true value (systematic error); flaws in study design; deviation of inferences, interpretations, or analyses based on flawed data or data collection; etc. There is no sense of prejudice or subjectivity implied in the assessment of bias under these conditions. Aggregation Bias,Bias, Aggregation,Bias, Ecological,Bias, Statistical,Bias, Systematic,Ecological Bias,Outcome Measurement Errors,Statistical Bias,Systematic Bias,Bias, Epidemiologic,Biases,Biases, Ecological,Biases, Statistical,Ecological Biases,Ecological Fallacies,Ecological Fallacy,Epidemiologic Biases,Experimental Bias,Fallacies, Ecological,Fallacy, Ecological,Scientific Bias,Statistical Biases,Truncation Bias,Truncation Biases,Bias, Experimental,Bias, Scientific,Bias, Truncation,Biase, Epidemiologic,Biases, Epidemiologic,Biases, Truncation,Epidemiologic Biase,Error, Outcome Measurement,Errors, Outcome Measurement,Outcome Measurement Error
D016032 Randomized Controlled Trials as Topic Works about clinical trials that involve at least one test treatment and one control treatment, concurrent enrollment and follow-up of the test- and control-treated groups, and in which the treatments to be administered are selected by a random process, such as the use of a random-numbers table. Clinical Trials, Randomized,Controlled Clinical Trials, Randomized,Trials, Randomized Clinical

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