Speech Therapy - An Introduction

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PatientPlus articles are written by UK doctors and are based on research evidence, UK and European Guidelines. They are designed for health professionals to use, so you may find the language more technical than the condition leaflets.

Speech and language therapists assess and treat speech, language and communication problems in people of all ages. They help people to become independent communicators using speech, gesture and/or communication aids as needed. They also work with people who have eating, drinking, chewing and swallowing difficulties.[1] They work as part of a multidisciplinary team and have close links with teachers, doctors, nurses, psychologists, occupational therapists and other health professionals. They work in hospital and community settings: on inpatient wards, in outpatient clinics, and in schools, health centres and clients' homes. The NHS Information Centre non-medical census (NHS IC, 2011) recorded a headcount of 7,664 qualified speech and language therapists working in the NHS in England.[2] Speech and language therapy (SLT) is also available privately, for adults and children, through the Association of Speech and Language Therapists in Independent Practice (ASLTIP).

In the UK:[3] 

  • 2.5 million people have a speech or language difficulty.
  • 5% of children enter school with difficulties in speech and language.
  • 30% of people who have had a cerebrovascular event have a persisting speech and language disorder.
  • More than 60% of young offenders have some form of speech and language impairment or communication needs.
  • Over 75% of people with mental health disorders have communication difficulties.

In the year 2004-2005:

  • There were 346,000 initial contacts, or new episodes of care, made by speech and language therapists working in the NHS in England.[4]
  • Most of these referrals were made by hospital consultants in general medicine, geriatric medicine and ear, nose and throat specialties.[4]
  • 38% of referrals were for children of preschool or school age.[4]

Increasing demand is likely to result from the ageing population, the rise in dementia and the increasing number of children with complex speech, language and communication needs.[2] 

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These include:

There is a three- or four-year degree course accredited by the Royal College of Speech and Language Therapists (RCSLT) and graduates are registered by the college. A two-year postgraduate qualification can also be taken if the candidate has an appropriate first degree. All speech and language therapists are registered with the Health and Care Professions Council (HCPC). To be registered, speech and language therapists must meet the Council's standards for their training, professional skills, behaviour and health.

SLT assistants, support workers and bilingual co-workers also exist. These team members work alongside a speech and language therapist, including working with clients on a one-to-one basis, assisting in group therapy sessions, clerical and administrative work or advising on culture and language differences.

SLT, like every other aspect of medical care, should be subjected to vigorous scientific appraisal. Trials have been undertaken in the field of SLT. Evidence from large, randomised controlled trials (RCTs) is the gold standard. A review of evidence found the following:

  • A Cochrane review, published in 2003, concluded that there was some evidence for the effectiveness of SLT for children with expressive phonological and expressive vocabulary difficulties. It showed that there was mixed evidence for SLT interventions in children with expressive syntax difficulties and that more research was needed concerning interventions for those with receptive language difficulties.[7]
  • A Finnish study found that intensive speech therapy could help some patients who stuttered.[8] 
  • A Cochrane review published in 2012 showed some indication that SLT for people with aphasia after a stroke is effective. There seemed to be some evidence that people who had intensive SLT may do better, although in the trials reviewed, more people withdrew from intensive SLT than from conventional SLT. Overall, there was insufficient evidence to draw conclusions about the most effective way of delivering SLT.[9] 
  • Another Cochrane review found that more research is needed to determine the effectiveness of SLT in people with Parkinson's disease who have dysarthria.[10] 
  • A Cochrane review looking at children with cerebral palsy found no firm evidence of the positive effects of SLT. Again, the authors noted that further research is needed.[11] Likewise, more evidence is required to support the use of interventions for childhood apraxia of speech and dysarthria associated with acquired brain injury in children and adolescents.[12][13] 

The incidence of dysphagia has been reported in a variety of studies as being between 40-78%. This may put them at risk of aspiration and pneumonia. Stroke patients can also have speech, language and communication problems.[14] 

The National Institute for Health and Care Excellence (NICE) has issued guidelines on the diagnosis and acute management of stroke and transient ischaemic attacks.[15] Scottish Intercollegiate Guidelines Network (SIGN) has also issued guidelines on the management of patients with stroke, including guidelines about the assessment and management of dysphagia in stroke patients.[16][17][18] As well as this, the Intercollegiate Stroke Working Party (ISWP) has issued national clinical guidelines for stroke which incorporate the recommendations from NICE.[14] All of these guidelines recognise speech and language therapists as an integral part of the stroke care team and give specific details about when a stroke patient should be referred to a speech and language therapist. The ISWP National Clinical Guidelines for Stroke suggest the following:

  • On admission, people with acute stroke should have their swallowing screened by an appropriately trained healthcare professional before being given any oral food, fluid or medication. If there are concerns, referral to a speech and language therapist (or other appropriately trained professional with specialism in dysphagia) should be made, preferably within 24 hours of admission and not more than 72 hours afterwards.
  • Referral to a speech and language therapist should also be made for any communication difficulties including suspected aphasia, unclear or unintelligible speech affecting a patient's communication, suspected speech apraxia (problems with word articulation) or communication difficulties despite reasonable cognition and language function.

Speech and language therapists and their assistants form an important part of the multidisciplinary team. Their specialist training allows assessment and treatment of patients of all ages with varied and complex medical and developmental problems. They are governed by their own professional standards and guidelines, supported by evidence from the literature and consensus expert opinion.

Further reading & references

  1. Speech and Language Therapist; NHS Careers
  2. Speech and language therapists: Workforce risks and opportunities – education commissioning risks summary; Centre for Workplace Intelligence, 2012
  3. The All Party Parliamentary Group on Speech and Language Difficulties; Royal College of Speech and Language Therapists, 2014
  4. NHS Speech and Language Therapy, Summary information - England, 2004-05; Health and Social Care Information Centre (HSCIC)
  5. What is speech and languge therapy?
  6. Entry requirements and training for speech and language therapy; NHS Careers, 2014
  7. Law J, Garrett Z, Nye C; Speech and language therapy interventions for children with primary speech and language delay or disorder. Cochrane Database Syst Rev. 2003;(3):CD004110.
  8. Laiho A, Klippi A; Long- and short-term results of children's and adolescents' therapy courses for stuttering. Int J Lang Commun Disord. 2007 May-Jun;42(3):367-82.
  9. Brady MC, Kelly H, Godwin J, et al; Speech and language therapy for aphasia following stroke. Cochrane Database Syst Rev. 2012 May 16;5:CD000425. doi: 10.1002/14651858.CD000425.pub3.
  10. Herd CP, Tomlinson CL, Deane KH, et al; Speech and language therapy versus placebo or no intervention for speech problems in Parkinson's disease. Cochrane Database Syst Rev. 2012 Aug 15;8:CD002812. doi: 10.1002/14651858.CD002812.pub2.
  11. Pennington L, Goldbart J, Marshall J; Speech and language therapy to improve the communication skills of children with Cochrane Database Syst Rev. 2004;(2):CD003466 (Assessed as up to date in 2011).
  12. Morgan AT, Vogel AP; A Cochrane review of treatment for childhood apraxia of speech. Eur J Phys Rehabil Med. 2009 Mar;45(1):103-10.
  13. Morgan AT, Vogel AP; A Cochrane review of treatment for dysarthria following acquired brain injury in children and adolescents. Eur J Phys Rehabil Med. 2009 Jun;45(2):197-204. Epub 2009 Jan 21.
  14. National Clinical Guidelines for Stroke - fourth edition; Royal College of Physicians, 2012
  15. Stroke: The diagnosis and acute management of stroke and transient ischaemic attack (TIA); NICE Clinical Guideline (July 2008)
  16. Management of patients with stroke: rehabilitation, prevention and management of complications, and discharge planning; Scottish Intercollegiate Guidelines Network - SIGN (June 2010)
  17. Management of patients with stroke: Identification and management of dysphagia; Scottish Intercollegiate Guidelines Network - SIGN (June 2010)
  18. Management of patients with stroke or TIA: assessment, investigation, immediate management and secondary prevention; Scottish Intercollegiate Guidelines Network - SIGN (December 2008)

Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.

Original Author:
Dr Michelle Wright
Current Version:
Peer Reviewer:
Dr John Cox
Document ID:
2794 (v23)
Last Checked:
19/09/2014
Next Review:
18/09/2019

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