Skip to main content
Top
Published in: Dysphagia 2/2014

01-04-2014 | Review Article

Psychometric Characteristics of Health-Related Quality-of-Life Questionnaires in Oropharyngeal Dysphagia

Authors: Angelique A. Timmerman, Renée Speyer, Bas J. Heijnen, Iris R. Klijn-Zwijnenberg

Published in: Dysphagia | Issue 2/2014

Login to get access

Abstract

Dysphagia can have severe consequences for the patient’s health, influencing health-related quality of life (HRQoL). Sound psychometric properties of HRQoL questionnaires are a precondition for assessing the impact of dysphagia, the focus of this study, resulting in recommendations for the appropriate use of these questionnaires in both clinical practice and research contexts. We performed a systematic review starting with a search for and retrieval of all full-text articles on the development of HRQoL questionnaires related to oropharyngeal dysphagia and/or their psychometric validation from the electronic databases PubMed and Embase published up to June 2011. Psychometric properties were judged according to quality criteria proposed for health status questionnaires. Eight questionnaires were included in this study. Four are aimed solely at HRQoL in oropharyngeal dysphagia: the deglutition handicap index (DHI), dysphagia handicap index (DHI′), M.D. Anderson Dysphagia Inventory (MDADI), and SWAL-QOL, while the EDGQ, EORTC QLQ-STO 22, EORTC QLQ-OG 25 and EORTC QLQ-H&N35 focus on other primary diseases resulting in dysphagia. The psychometric properties of the DHI, DHI′, MDADI, and SWAL-QOL were evaluated. For appropriate applicability of HRQoL questionnaires, strong scores on the psychometric criteria face validity, criterion validity, and interpretability are prerequisites. The SWAL-QOL has the strongest ratings for these criteria, while the DHI′ is the most easy to apply given its 25 items and the use of a uniform scoring format. For optimal use of HRQoL questionnaires in diverse settings, it is necessary to combine psychometric and utility approaches.
Literature
1.
3.
go back to reference International Health Conference. Constitution of the World Health Organization. 1946. Bull World Health Organ. 2002;80:983–4. International Health Conference. Constitution of the World Health Organization. 1946. Bull World Health Organ. 2002;80:983–4.
4.
go back to reference Ware JE. The status of health assessment. Annu Rev Public Health. 1994;16:327–54.CrossRef Ware JE. The status of health assessment. Annu Rev Public Health. 1994;16:327–54.CrossRef
6.
go back to reference Wilson IB, Cleary PD. Linking clinical variables with health-related quality of life: a conceptual model of patient outcomes. JAMA. 1995;273:59–65.PubMedCrossRef Wilson IB, Cleary PD. Linking clinical variables with health-related quality of life: a conceptual model of patient outcomes. JAMA. 1995;273:59–65.PubMedCrossRef
7.
go back to reference Smith KW, Avis NE, Assmann SF. Distinguishing between quality of life and health status in quality of life research: a meta-analysis. Qual Life Res. 1999;8:447–59.PubMedCrossRef Smith KW, Avis NE, Assmann SF. Distinguishing between quality of life and health status in quality of life research: a meta-analysis. Qual Life Res. 1999;8:447–59.PubMedCrossRef
8.
go back to reference Ferrans C, Zerwic J, Wilbur J, Larson J. Conceptual model of health-related quality of life. J Nurs Scholarsh. 2005;37:336–42.PubMedCrossRef Ferrans C, Zerwic J, Wilbur J, Larson J. Conceptual model of health-related quality of life. J Nurs Scholarsh. 2005;37:336–42.PubMedCrossRef
9.
go back to reference Ferrans CE. Differences in what quality-of-life instruments measure. J Natl Cancer Inst Monogr. 2007;37:22–6.PubMedCrossRef Ferrans CE. Differences in what quality-of-life instruments measure. J Natl Cancer Inst Monogr. 2007;37:22–6.PubMedCrossRef
10.
go back to reference Cook IJ, Kahrillas PJ. Technical review on management of oropharyngeal dysphagia. Gastroenterology. 1999;116:445–58.CrossRef Cook IJ, Kahrillas PJ. Technical review on management of oropharyngeal dysphagia. Gastroenterology. 1999;116:445–58.CrossRef
11.
go back to reference Garcia-Peris P, Paron L, Velasco C, de la Cuerda C, Camblor M, Breton I, Herencia H, Verdaguer J, Navarro C, Clave P. Long-term prevalence of oropharyngeal dysphagia in head and neck cancer patients: impact on quality of life. Clin Nutr. 2007;26:710–7.PubMedCrossRef Garcia-Peris P, Paron L, Velasco C, de la Cuerda C, Camblor M, Breton I, Herencia H, Verdaguer J, Navarro C, Clave P. Long-term prevalence of oropharyngeal dysphagia in head and neck cancer patients: impact on quality of life. Clin Nutr. 2007;26:710–7.PubMedCrossRef
12.
go back to reference Ekberg O, Hamdy S, Woisard V, Wuttge-Hannig A, Ortega P. Social and psychological burden of dysphagia: its impact on diagnosis and treatment. Dysphagia. 2002;17:139–46.PubMedCrossRef Ekberg O, Hamdy S, Woisard V, Wuttge-Hannig A, Ortega P. Social and psychological burden of dysphagia: its impact on diagnosis and treatment. Dysphagia. 2002;17:139–46.PubMedCrossRef
13.
go back to reference Crary M, Groher ME, editors. Introduction to adult swallowing disorders. Waltham: Elsevier; 2003. Crary M, Groher ME, editors. Introduction to adult swallowing disorders. Waltham: Elsevier; 2003.
14.
go back to reference Murry T, Carrau RL, editors. Clinical management of swallowing disorders. San Diego: Plural; 2006. Murry T, Carrau RL, editors. Clinical management of swallowing disorders. San Diego: Plural; 2006.
15.
go back to reference Nguyen NP, Frank C, Moltz CC, et al. Impact of dysphagia on quality of life after treatment of head and neck cancer. Int J Radiat Oncol Biol Phys. 2005;61:772–8.PubMedCrossRef Nguyen NP, Frank C, Moltz CC, et al. Impact of dysphagia on quality of life after treatment of head and neck cancer. Int J Radiat Oncol Biol Phys. 2005;61:772–8.PubMedCrossRef
16.
go back to reference Campbell BH, Spinelli K, Marbella AM, et al. Aspiration, weight loss and quality of life in head and neck cancer survivors. Arch Otolaryngol Head Neck Surg. 2004;130:1100–3.PubMedCrossRef Campbell BH, Spinelli K, Marbella AM, et al. Aspiration, weight loss and quality of life in head and neck cancer survivors. Arch Otolaryngol Head Neck Surg. 2004;130:1100–3.PubMedCrossRef
17.
18.
go back to reference McHorney CA, Martin-Harris B, Robbins J, Rosenbek J. Clinical validity of the SWAL-QOL and SWAL-CARE outcome tools with respect to bolus flow measures. Dysphagia. 2006;3:141–8.CrossRef McHorney CA, Martin-Harris B, Robbins J, Rosenbek J. Clinical validity of the SWAL-QOL and SWAL-CARE outcome tools with respect to bolus flow measures. Dysphagia. 2006;3:141–8.CrossRef
19.
go back to reference Spertus JA. Evolving applications for patient-centered health status measures. Circulation. 2008;118:2103–10.PubMedCrossRef Spertus JA. Evolving applications for patient-centered health status measures. Circulation. 2008;118:2103–10.PubMedCrossRef
20.
go back to reference Patrick DL, Deyo RA. Generic and disease-specific measures in assessing health status and quality of life. Med Care. 1989;27:S217–32.PubMedCrossRef Patrick DL, Deyo RA. Generic and disease-specific measures in assessing health status and quality of life. Med Care. 1989;27:S217–32.PubMedCrossRef
21.
go back to reference Feinstein AR. Benefits and obstacles for development of health status assessment measures in clinical settings. Med Care. 1992;30:MS50–6.PubMedCrossRef Feinstein AR. Benefits and obstacles for development of health status assessment measures in clinical settings. Med Care. 1992;30:MS50–6.PubMedCrossRef
22.
go back to reference Guyatt GH, Feeny DH, Patrick DL. Measuring health-related quality of life. Ann Intern Med. 1993;118:622–9.PubMedCrossRef Guyatt GH, Feeny DH, Patrick DL. Measuring health-related quality of life. Ann Intern Med. 1993;118:622–9.PubMedCrossRef
23.
go back to reference Terwee CB, Bot SD, de Boer MR, Windt DA, van der Knol DL, Dekker J, Bouter LM, de Vet HC. Quality criteria were proposed for measurement properties of health status questionnaires. J Clin Epidemiol. 2007;60:34–42.PubMedCrossRef Terwee CB, Bot SD, de Boer MR, Windt DA, van der Knol DL, Dekker J, Bouter LM, de Vet HC. Quality criteria were proposed for measurement properties of health status questionnaires. J Clin Epidemiol. 2007;60:34–42.PubMedCrossRef
24.
go back to reference Timmerman AA, Meesters CM, Speyer R, Anteunis LJ. Psychometric qualities of questionnaires for the assessment of otitis media impact. Clin Otolaryngol. 2007;32:429–39.PubMedCrossRef Timmerman AA, Meesters CM, Speyer R, Anteunis LJ. Psychometric qualities of questionnaires for the assessment of otitis media impact. Clin Otolaryngol. 2007;32:429–39.PubMedCrossRef
25.
go back to reference Hassan SJ, Weymuller EA Jr. Assessment of quality of life in head and neck cancer patients. Head Neck. 1993;15:485–96.PubMedCrossRef Hassan SJ, Weymuller EA Jr. Assessment of quality of life in head and neck cancer patients. Head Neck. 1993;15:485–96.PubMedCrossRef
26.
go back to reference Terrell JE, Nanavati KA, Esclamado RM, Bishop JK, Bradford CR, Wolf GT. Head and neck cancer-specific quality of life. Arch Otolaryngol Head Neck Surg. 1997;123:1125–32.PubMedCrossRef Terrell JE, Nanavati KA, Esclamado RM, Bishop JK, Bradford CR, Wolf GT. Head and neck cancer-specific quality of life. Arch Otolaryngol Head Neck Surg. 1997;123:1125–32.PubMedCrossRef
27.
go back to reference Blazeby JM, Conroy T, Hammerlid E, Fayers P, Sezer O, Koller M, Arraras J, Bottomley A, Vickery CW, Etienne PL, Alderson D. Clinical and psychometric validation of an EORTC questionnaire module, the EORTC QLQ-OES18, to assess quality of life in patients with oesophageal cancer. Eur J Cancer. 2003;39:1384–94.PubMedCrossRef Blazeby JM, Conroy T, Hammerlid E, Fayers P, Sezer O, Koller M, Arraras J, Bottomley A, Vickery CW, Etienne PL, Alderson D. Clinical and psychometric validation of an EORTC questionnaire module, the EORTC QLQ-OES18, to assess quality of life in patients with oesophageal cancer. Eur J Cancer. 2003;39:1384–94.PubMedCrossRef
28.
go back to reference Cella DF, Tulsky DS, Gray G, Sarafian B, Linn E, Bonomi A, Silberman M, Yellen SB, Winicour P, Brannon J, Eckberg K, Lloyd S, Purl S, Blendowski C, Goodman M, Barnicle M, Stewart I, McHale M, Bonomi P, Kaplan E, Taylor S IV, Thomas CR Jr, Harris J. The functional assessment of cancer therapy scale: development and validation of the general measure. J Clin Oncol. 1993;11:570–9.PubMed Cella DF, Tulsky DS, Gray G, Sarafian B, Linn E, Bonomi A, Silberman M, Yellen SB, Winicour P, Brannon J, Eckberg K, Lloyd S, Purl S, Blendowski C, Goodman M, Barnicle M, Stewart I, McHale M, Bonomi P, Kaplan E, Taylor S IV, Thomas CR Jr, Harris J. The functional assessment of cancer therapy scale: development and validation of the general measure. J Clin Oncol. 1993;11:570–9.PubMed
29.
go back to reference Wallace KL, Middleton S, Cook IJ. Development and validation of a self-report symptom inventory to assess the severity of oral-pharyngeal dysphagia. Gastroenterology. 2000;118:678–87.PubMedCrossRef Wallace KL, Middleton S, Cook IJ. Development and validation of a self-report symptom inventory to assess the severity of oral-pharyngeal dysphagia. Gastroenterology. 2000;118:678–87.PubMedCrossRef
30.
go back to reference Klugman TM, Ross E. Perceptions of the impact of speech, language, swallowing and hearing difficulties on quality of life of a group of South African persons with multiple sclerosis. Fol Phoniatr Logop. 2002;54:201–21.CrossRef Klugman TM, Ross E. Perceptions of the impact of speech, language, swallowing and hearing difficulties on quality of life of a group of South African persons with multiple sclerosis. Fol Phoniatr Logop. 2002;54:201–21.CrossRef
31.
go back to reference McHorney CA, Bricker DE, Kramer AE, Rosenbek JC, Robbins J, Chignell KA, Logemann JA, Clarke C. The SWAL-QOL outcomes tool for oropharyngeal dysphagia in adults: I conceptual foundation and item development. Dysphagia. 2000;15:115–21.PubMedCrossRef McHorney CA, Bricker DE, Kramer AE, Rosenbek JC, Robbins J, Chignell KA, Logemann JA, Clarke C. The SWAL-QOL outcomes tool for oropharyngeal dysphagia in adults: I conceptual foundation and item development. Dysphagia. 2000;15:115–21.PubMedCrossRef
32.
go back to reference McHorney CA, Bricker DE, Robbins J, Kramer AE, Rosenbek JC, Chignell KA. The SWAL-QOL outcomes tool for oropharyngeal dysphagia in adults: II item reduction and preliminary scaling. Dysphagia. 2000;15:122–33.PubMedCrossRef McHorney CA, Bricker DE, Robbins J, Kramer AE, Rosenbek JC, Chignell KA. The SWAL-QOL outcomes tool for oropharyngeal dysphagia in adults: II item reduction and preliminary scaling. Dysphagia. 2000;15:122–33.PubMedCrossRef
33.
go back to reference McHorney CA, Robbins J, Lomax K, Rosenbek JC, Chignell K, Kramer AE, Bricker DE. The SWAL-QOL and SWAL-CARE outcomes tool for oropharyngeal dysphagia in adults: III documentation of reliability and validity. Dysphagia. 2002;17:97–114.PubMedCrossRef McHorney CA, Robbins J, Lomax K, Rosenbek JC, Chignell K, Kramer AE, Bricker DE. The SWAL-QOL and SWAL-CARE outcomes tool for oropharyngeal dysphagia in adults: III documentation of reliability and validity. Dysphagia. 2002;17:97–114.PubMedCrossRef
34.
go back to reference Chen AY, Frankowski R, Bishop-Leone J, Hebert T, Leyk S, Lewin J, Goepfert H. The development and validation of a dysphagia-specific quality-of-life questionnaire for patients with head and neck cancer. Arch Otolaryngol Head Neck Surg. 2001;127:870–6.PubMed Chen AY, Frankowski R, Bishop-Leone J, Hebert T, Leyk S, Lewin J, Goepfert H. The development and validation of a dysphagia-specific quality-of-life questionnaire for patients with head and neck cancer. Arch Otolaryngol Head Neck Surg. 2001;127:870–6.PubMed
35.
go back to reference Woisard V, Andrieux MP, Puech M. Validation of a self-assessment questionnaire for swallowing disorders (deglutition handicap index). Rev Laryngol Otol Rhinol. 2006;127:315–25. Woisard V, Andrieux MP, Puech M. Validation of a self-assessment questionnaire for swallowing disorders (deglutition handicap index). Rev Laryngol Otol Rhinol. 2006;127:315–25.
36.
go back to reference Silbergleit AK, Schultz L, Jacobson BH, Beardsley T, Johnson AF. The dysphagia handicap index: development and validation. Dysphagia. 2012;27:46–52.PubMedCrossRef Silbergleit AK, Schultz L, Jacobson BH, Beardsley T, Johnson AF. The dysphagia handicap index: development and validation. Dysphagia. 2012;27:46–52.PubMedCrossRef
37.
go back to reference Aaronson NK, Ahmedzai S, Bergman B, Bullinger M, Cull A, Duez NJ, Filiberti A, Flechtner H, Fleishman SB, de Haes JC. The European organization for research and treatment of cancer QLQ-C30: a quality-of-life instrument for use in international trials in oncology. J Natl Cancer Inst. 1993;85:365–76.PubMedCrossRef Aaronson NK, Ahmedzai S, Bergman B, Bullinger M, Cull A, Duez NJ, Filiberti A, Flechtner H, Fleishman SB, de Haes JC. The European organization for research and treatment of cancer QLQ-C30: a quality-of-life instrument for use in international trials in oncology. J Natl Cancer Inst. 1993;85:365–76.PubMedCrossRef
38.
go back to reference Vickery CW, Blazeby JM, Conroy T, Arraras J, Sezer O, Koller M, Rosemeyer D, Johnson CD, Alderson D. Development of an EORTC disease-specific quality of life module for use in patients with gastric cancer. Eur J Cancer. 2001;37:966–71.PubMedCrossRef Vickery CW, Blazeby JM, Conroy T, Arraras J, Sezer O, Koller M, Rosemeyer D, Johnson CD, Alderson D. Development of an EORTC disease-specific quality of life module for use in patients with gastric cancer. Eur J Cancer. 2001;37:966–71.PubMedCrossRef
39.
go back to reference Blazeby JM, Conroy T, Bottomley A, Vickery C, Arraras J, Sezer O, Moore J, Koller M, Turhal NS, Stuart R, van Cutsem E, D’haese S, Coens C. European organisation for research and treatment of cancer Gastrointestinal and quality of life groups. Clinical and psychometric validation of a questionnaire module, the EORTC QLQ-STO 22, to assess quality of life in patients with gastric cancer. Eur J Cancer. 2004;40:2260–8.PubMedCrossRef Blazeby JM, Conroy T, Bottomley A, Vickery C, Arraras J, Sezer O, Moore J, Koller M, Turhal NS, Stuart R, van Cutsem E, D’haese S, Coens C. European organisation for research and treatment of cancer Gastrointestinal and quality of life groups. Clinical and psychometric validation of a questionnaire module, the EORTC QLQ-STO 22, to assess quality of life in patients with gastric cancer. Eur J Cancer. 2004;40:2260–8.PubMedCrossRef
40.
go back to reference Lagergren P, Fayers P, Conroy T, Stein HJ, Sezer O, Hardwick R, Hammerlid E, Bottomley A, van Cutsem E, Blazeby JM. Clinical and psychometric validation of a questionnaire module, the EORTC QLQ-OG25, to assess health-related quality of life in patients with cancer of the oesophagus, the oesophago-gastric junction and the stomach. Eur J Cancer. 2007;43:2066–73.PubMedCrossRef Lagergren P, Fayers P, Conroy T, Stein HJ, Sezer O, Hardwick R, Hammerlid E, Bottomley A, van Cutsem E, Blazeby JM. Clinical and psychometric validation of a questionnaire module, the EORTC QLQ-OG25, to assess health-related quality of life in patients with cancer of the oesophagus, the oesophago-gastric junction and the stomach. Eur J Cancer. 2007;43:2066–73.PubMedCrossRef
41.
go back to reference Bjordal K, Ahlner-Elmqvist M, Tollesson E, Jensen AB, Razavi D, Maher EJ, Kaasa S. Development of a European organisation for research and treatment of cancer (EORTC) questionnaire module to be used in quality of life assessments in head and neck cancer patients. Acta Oncol. 1994;33:879–85.PubMedCrossRef Bjordal K, Ahlner-Elmqvist M, Tollesson E, Jensen AB, Razavi D, Maher EJ, Kaasa S. Development of a European organisation for research and treatment of cancer (EORTC) questionnaire module to be used in quality of life assessments in head and neck cancer patients. Acta Oncol. 1994;33:879–85.PubMedCrossRef
42.
go back to reference Bjordal K, Hammerlid E, Ahlner-Elmqvist M, Graeff A, de Boysen M, Evensen JF, Bjorklund A, de Leeuw RJ, Fayers PM, Jannert M, Westin T, Kaasa S. Quality of life in head and neck cancer patients: validation of the European organisation for research and Treatment of cancer quality of life questionnaire-H&N35. J Clin Oncol. 1999;17:1008–19.PubMed Bjordal K, Hammerlid E, Ahlner-Elmqvist M, Graeff A, de Boysen M, Evensen JF, Bjorklund A, de Leeuw RJ, Fayers PM, Jannert M, Westin T, Kaasa S. Quality of life in head and neck cancer patients: validation of the European organisation for research and Treatment of cancer quality of life questionnaire-H&N35. J Clin Oncol. 1999;17:1008–19.PubMed
43.
go back to reference Jamoulle M. Traduction Française des COOP/WONCA charts (French adaptation of the COOP/WONCA charts). Brussels: FMMCSF; 1992. Jamoulle M. Traduction Française des COOP/WONCA charts (French adaptation of the COOP/WONCA charts). Brussels: FMMCSF; 1992.
44.
go back to reference Jamoulle M, Roland M, Blanc HW. Mesure de l'état fonctionnel en médecine générale: les cartes COOP/WONCA (Functional measure in general medicine: the COOP/WONCA charts). Rev Med Brux. 1994;15:329–32. Jamoulle M, Roland M, Blanc HW. Mesure de l'état fonctionnel en médecine générale: les cartes COOP/WONCA (Functional measure in general medicine: the COOP/WONCA charts). Rev Med Brux. 1994;15:329–32.
45.
go back to reference Stewart AL, Hays RD, Ware JE. The MOS short-form general health survey: reliability and validity in a patient population. Med Care. 1988;26:724–35.PubMedCrossRef Stewart AL, Hays RD, Ware JE. The MOS short-form general health survey: reliability and validity in a patient population. Med Care. 1988;26:724–35.PubMedCrossRef
46.
go back to reference Ware JE, Sherbourne CD. The MOS 36-item short-form health survey (SF-36): I. Conceptual framework and item selection. Med Care. 1992;30:473–83.PubMedCrossRef Ware JE, Sherbourne CD. The MOS 36-item short-form health survey (SF-36): I. Conceptual framework and item selection. Med Care. 1992;30:473–83.PubMedCrossRef
47.
go back to reference Brenner MH, Curbow B, Legro M. The proximal distal continuum in multiple health outcome measures: the case of cataract surgery. Med Care. 1995;33:AS236–44.PubMed Brenner MH, Curbow B, Legro M. The proximal distal continuum in multiple health outcome measures: the case of cataract surgery. Med Care. 1995;33:AS236–44.PubMed
48.
go back to reference Wright JG. Interpreting Health-Related Quality of Life Scores - The simple rule of seven may not be so simple. Med Care. 2003;5:597–8.CrossRef Wright JG. Interpreting Health-Related Quality of Life Scores - The simple rule of seven may not be so simple. Med Care. 2003;5:597–8.CrossRef
49.
go back to reference Gotay CC, Korn EL, McCabe MS, Moore TD, Cheson BD. Quality-of-life assessment in cancer treatment protocols: research issues in protocol development. J Natl Cancer Inst. 1992;84:575–9.PubMedCrossRef Gotay CC, Korn EL, McCabe MS, Moore TD, Cheson BD. Quality-of-life assessment in cancer treatment protocols: research issues in protocol development. J Natl Cancer Inst. 1992;84:575–9.PubMedCrossRef
51.
go back to reference Bech P. Quality of life measurement in the medical setting. Eur J Psychiatry. 1995;10:83s–5s.CrossRef Bech P. Quality of life measurement in the medical setting. Eur J Psychiatry. 1995;10:83s–5s.CrossRef
52.
go back to reference Guyatt GH, Kirshner B, Jaeschke R. Measuring health status: what are the necessary measurement properties? J Clin Epidemiol. 1992;45:1341–5.PubMedCrossRef Guyatt GH, Kirshner B, Jaeschke R. Measuring health status: what are the necessary measurement properties? J Clin Epidemiol. 1992;45:1341–5.PubMedCrossRef
53.
go back to reference Thier SO. Forces motivating the use of health status assessment measures in clinical settings and related clinical research. Med Care. 1992;30:MS15–22.PubMedCrossRef Thier SO. Forces motivating the use of health status assessment measures in clinical settings and related clinical research. Med Care. 1992;30:MS15–22.PubMedCrossRef
55.
go back to reference Faden R, Leplege A. Assessing quality of life - Moral implications for clinical practice. Med Care. 1992;30:MS166–75.PubMedCrossRef Faden R, Leplege A. Assessing quality of life - Moral implications for clinical practice. Med Care. 1992;30:MS166–75.PubMedCrossRef
57.
go back to reference Hays RD, Woolley JM. The concept of clinically meaningful difference in health-related quality-of-life research—how meaningful is it? Pharmaeconomics. 2000;18:419–23.CrossRef Hays RD, Woolley JM. The concept of clinically meaningful difference in health-related quality-of-life research—how meaningful is it? Pharmaeconomics. 2000;18:419–23.CrossRef
58.
go back to reference Osaba D, Brada M, Yung W, Prados M. Health-related quality of life in patients with anaplastic astrocytoma during treatment with temozolomide. Eur J Cancer. 2000;36:1788–95.CrossRef Osaba D, Brada M, Yung W, Prados M. Health-related quality of life in patients with anaplastic astrocytoma during treatment with temozolomide. Eur J Cancer. 2000;36:1788–95.CrossRef
Metadata
Title
Psychometric Characteristics of Health-Related Quality-of-Life Questionnaires in Oropharyngeal Dysphagia
Authors
Angelique A. Timmerman
Renée Speyer
Bas J. Heijnen
Iris R. Klijn-Zwijnenberg
Publication date
01-04-2014
Publisher
Springer US
Published in
Dysphagia / Issue 2/2014
Print ISSN: 0179-051X
Electronic ISSN: 1432-0460
DOI
https://doi.org/10.1007/s00455-013-9511-8

Other articles of this Issue 2/2014

Dysphagia 2/2014 Go to the issue