Comparing Outcomes of Voice Therapy: A Benchmarking Study Using the Therapy Outcome Measure

Speech pathology as the MasterChef: Getting the right ingredients and stirring the pot

The purpose of this paper is to consider the many influences that have an impact on appropriate speech-language pathology service delivery. The competitive cooking and entertainment television program, MasterChef, is used as an analogy to consider the ingredients, blend and approach required to improve speech-language pathology services. Speech-language pathologists (SLPs) enter the profession with the aim of assisting those with communication and swallowing disorders to have a better quality of life. Thus, we should be restless to continue to improve our services in order to achieve the best influence and outcomes by changing our recipes and ingredients. However, having good technical skills as a SLP is not sufficient in ensuring that the services are the best they can be. We have to consider available resources, customers and service users, who it is that judges our services, whether we are as good as we could or should be, what can help us improve our services, what the appetite is for our services, and how we incorporate evidence-based practice. This paper considers the value of understanding and using information on incidence and prevalence, evidence-based practice and outcome measurement. Blending technical, clinical and academic abilities with personal skills will result in an award-winning menu.

The behavioural treatment of muscle tension voice disorders: A systematic review

PURPOSE

A systematic review of behavioural intervention for the treatment of adults with muscle tension voice disorders (MTVD).

METHOD

A search of 12 electronic databases and reference lists for studies published between the years 1990-2014 was conducted using the PRISMA guidelines. Inclusion and exclusion criteria included type of publication, participant characteristics, intervention, outcome measures and report of outcomes. Methodological quality rating scales and confidence in diagnostic scale supported the literature evaluation.

RESULT

Seven papers met the inclusion criteria. Significant improvement on at least one outcome measure was reported for all studies. Effect sizes were small-to-large. Methodological qualities of research were varied. No study explicitly reported treatment fidelity and cumulative intervention intensity could only be calculated for two out of seven studies. Outcome measures were used inconsistently and less than half of the measures had reported reliability values. Confidence in the accuracy of subject diagnosis on average was rated as low. Specific "active ingredients" for therapeutic change were not identified.

CONCLUSION

Voice therapy for the treatment of MTVD is associated with positive treatment outcomes; however, there is an obvious need for systematic and high quality research designs to expand the evidence base for the behavioural treatment of MTVD.

Use of the extended therapy outcome measure for children with dysarthria

Increasing demand on healthcare resources has led to a greater emphasis on the examination of the impact of service delivery on outcomes. Clinical assessments frequently do not cover all aspects of change associated with interventions for those with complex conditions. This paper reviews the need for more comprehensive outcome measurement suitable for clinical practice and benchmarking. It describes an extension of the Therapy Outcome Measure for specific use in reflecting the impact of the broad range of interventions commonly required when managing children with dysarthria. Three case histories are used to illustrate the approach, and data from four speech-language pathology services are used to illustrate the value of benchmarking.

Introducing the therapy outcome measure for AAC services in the context of a review of other measures

PURPOSE

This article discusses the importance of outcome measures in improving Augmentative and Alternative Communication (AAC) services, reviews existing methods and introduces a new approach.

METHOD

Three methods were used in this study. 1. A literature review identifying outcome measures used in AAC research. 2. A questionnaire to AAC services in the UK which aimed to identify the objectives of their services and the outcome measures commonly used. 3. A working group of AAC experts provided additional information and interpretation. Central properties and conceptual framework were considered.

RESULTS

The literature review and questionnaire identified 23 outcome measures none of which cover the conceptual frameworks associated with all of the overall objectives of AAC provision. The review has informed the further development of a particular outcome measure the AAC Therapy Outcome Measure (AAC TOM) ensuring that basic principles of the International Classification of Functioning (ICF-WHO) are retained and the measure can be used in benchmarking.

CONCLUSION

An outcome measure needs to reflect change associated with service delivery. AAC services endeavour to impact on all of the domains of the ICF. A new measure is required in order to reflect the nature of these services. This article introduces an outcome measure which is in the process of being trialled by some services in the UK.

Therapy outcome measures: where are we now?

Outcomes information contributes to the provision of quality services: sharing that information requires speech-language pathologists (SLPs) to use terminology readily understood by professions ranging from health and education to social and voluntary services. The Therapy Outcome Measure (TOM) provides a way of presenting outcome data in a digestible form, comprising part of a range of multiple measures used to collect information on the structures, processes, and outcomes of care. TOM was developed to provide a practical method of measuring outcomes in routine clinical practice. Furthermore, it has been used in a number of research studies as an outcome indicator. As an example of its utility in research, the article cites a benchmarking study, together with examples of internal and external benchmarking of outcomes intended to illustrate how the benchmarking of TOM data can inform practice. The TOM can therefore inform SLPs on their own outcomes, the outcomes for specific client groups, and, by benchmarking TOM data, can contribute to the delivery of better, more efficient services.

The end of an affair: Discharging clients from speech-language pathology

This paper expands on the lead article by Hersh (2010) regarding a number of challenges that face speech-language pathologists (SLPs) when ending therapy, in this case focusing on children's speech and language impairment. Children's speech and language impairments are often long-term with impacts on other aspects of their functioning; there is little clarity about the notion of resolution and there is little research about optimum points of discharge or ending therapy. In the lead article, Hersh (2010) reports the personal concerns experienced by SLPs working with people with aphasia. Similar findings are highlighted here from the child speech and language impairment context; in particular that SLPs' thresholds of concern vary. The paper notes the resource pressures that lead to prioritization decisions related to the point of discharge and argues that clarity in goal planning and the explicit discussion of goals and the purpose of intervention, in partnership with clients and their families goes some way to reducing pressure faced by SLPs.

Effects of Voice Therapy: A Systematic Review

Medical as well as paramedical treatments should be evaluated by scientific methods. This systematic review focuses on the effects of voice therapy, excluding pharmacological or surgical treatments. In general, statistically significant positive but modest and varying therapy effects are found. Many of these effect studies cope with diverse methodological problems. Furthermore, the conclusions of most studies cannot be generalized easily or compared to one another. As a consequence, many issues in the field of effects of voice therapy have yet been unanswered.

Interventions for preventing voice disorders in adults

BACKGROUND

Poor voice quality due to a voice disorder can lead to a reduced quality of life. In occupations where voice use is substantial it can lead to periods of absence from work.

OBJECTIVES

To evaluate the effectiveness of interventions to prevent voice disorders in adults.

SEARCH STRATEGY

We searched MEDLINE (PubMed, 1950 to 2006), EMBASE (1974 to 2006), CENTRAL (The Cochrane Library, Issue 2 2006), CINAHL (1983 to 2006), PsychINFO (1967 to 2006), Science Citation Index (1986 to 2006) and the Occupational Health databases OSH-ROM (to 2006). The date of the last search was 05/04/06.

SELECTION CRITERIA

Randomised controlled clinical trials (RCTs) of interventions evaluating the effectiveness of treatments to prevent voice disorders in adults. For work-directed interventions interrupted time series and prospective cohort studies were also eligible.

DATA COLLECTION AND ANALYSIS

Two authors independently extracted data and assessed trial quality. Meta-analysis was performed where appropriate.

MAIN RESULTS

We identified two randomised controlled trials including a total of 53 participants in intervention groups and 43 controls. One study was conducted with teachers and the other with student teachers. Both trials were poor quality. Interventions were grouped into 1) direct voice training, 2) indirect voice training and 3) direct and indirect voice training combined.1) Direct voice training: One study did not find a significant decrease of the Voice Handicap Index for direct voice training compared to no intervention.2) Indirect voice training: One study did not find a significant decrease of the Voice Handicap Index for indirect voice training when compared to no intervention.3) Direct and indirect voice training combined: One study did not find a decrease of the Voice Handicap Index for direct and indirect voice training combined when compared to no intervention. The same study did however find an improvement in maximum phonation time (Mean Difference -3.18 sec; 95 % CI -4.43 to -1.93) for direct and indirect voice training combined when compared to no intervention. No work-directed studies were found. None of the studies found evaluated the effectiveness of prevention in terms of sick leave or number of diagnosed voice disorders.

AUTHORS' CONCLUSIONS

We found no evidence that either direct or indirect voice training or the two combined are effective in improving self-reported vocal functioning when compared to no intervention. The current practice of giving training to at-risk populations for preventing the development of voice disorders is therefore not supported by definitive evidence of effectiveness. Larger and methodologically better trials are needed with outcome measures that better reflect the aims of interventions.

Interventions for treating functional dysphonia in adults

BACKGROUND

Poor voice quality due to functional dysphonia can lead to a reduced quality of life. In occupations where voice use is substantial it can lead to a loss of employment.

OBJECTIVES

To evaluate the effectiveness of interventions to treat functional dysphonia in adults.

SEARCH STRATEGY

We searched MEDLINE (PubMed, 1950 to 2006), EMBASE (1974 to 2006), CENTRAL (The Cochrane Library, Issue 2 2006), CINAHL (1983 to 2006), PsychINFO (1967 to 2006), Science Citation Index (1986 to 2006) and the Occupational Health databases OSH-ROM (to 2006). The date of the last search was 5(th) April 2006.

SELECTION CRITERIA

Randomised controlled trials (RCTs) of interventions evaluating the effectiveness of treatments targeted at adults with functional dysphonia. For work-directed interventions interrupted time series and prospective cohort studies were also eligible.

DATA COLLECTION AND ANALYSIS

Two authors independently extracted data and assessed trial quality. Meta-analysis was performed where appropriate.

MAIN RESULTS

We identified six randomised controlled trials including a total of 163 participants in intervention groups and 141 controls. One trial was high quality. Interventions were grouped into 1) Direct voice therapy 2) Indirect voice therapy 3) Combination of direct and indirect voice therapy and 4) Other treatments: pharmacological treatment and vocal hygiene instructions given by phoniatrist. No studies were found evaluating direct voice therapy on its own. One study did not show indirect voice therapy on its own to be effective when compared to no intervention. There is evidence from three studies for the effectiveness of a combination of direct and indirect voice therapy on self-reported vocal functioning (SMD -1.07; 95% CI -1.94 to -0.19), on observer-rated vocal functioning (WMD -13.00; 95% CI -17.92 to -8.08) and on instrumental assessment of vocal functioning (WMD -1.20; 95% CI -2.37 to -0.03) when compared to no intervention. The results of one study also show that the remedial effect remains significant for at least 14 weeks on self-reported vocal functioning (SMD -0.51; 95% CI -0.87 to -0.14) and on observer-rated vocal functioning (Buffalo Voice Profile) (WMD -0.80; 95% CI -1.14 to -0.46). There is also limited evidence from one study that the number of symptoms may remain lower for a year. The combined therapy with biofeedback was not shown to be more effective than combined therapy alone in one study nor was pharmacological treatment found to be more effective than vocal hygiene instructions given by phoniatrist in one study. Publication bias may have influenced the results.

AUTHORS' CONCLUSIONS

Evidence is available for the effectiveness of comprehensive voice therapy comprising both direct and indirect therapy elements. Effects are similar in patients and in teachers and student teachers screened for voice problems. Larger and methodologically better studies are needed with outcome measures that match treatment aims.