title: English translation and validation of the SarQoL®, a quality of life questionnaire specific for sarcopenia.
abstract: the first quality of life questionnaire specific to sarcopenia, the SarQoL®, has recently been developed and validated in French. To extend the availability and utilisation of this questionnaire, its translation and validation in other languages is necessary.
  
  
  
  the purpose of this study was therefore to translate the SarQoL® into English and validate the psychometric properties of this new version.
  
  
  
  cross-sectional.
  
  
  
  Hertfordshire, UK.
  
  
  
  in total, 404 participants of the Hertfordshire Cohort Study, UK.
  
  
  
  the translation part was articulated in five stages: (i) two initial translations from French to English; (ii) synthesis of the two translations; (iii) backward translations; (iv) expert committee to compare the backward translations with the original questionnaire and (v) pre-test. To validate the English SarQoL®, we assessed its validity (discriminative power, construct validity), reliability (internal consistency, test-retest reliability) and floor/ceiling effects.
  
  
  
  the SarQoL® questionnaire was translated without any major difficulties. Results indicated a good discriminative power (lower score of quality of life for sarcopenic subjects, P = 0.01), high internal consistency (Cronbach's alpha of 0.88), consistent construct validity (high correlations found with domains related to mobility, usual activities, vitality, physical function and low correlations with domains related to anxiety, self-care, mental health and social problems) and excellent test-retest reliability (intraclass coefficient correlation of 0.95, 95%CI 0.92-0.97). Moreover, no floor/ceiling has been found.
  
  
  
  a valid SarQoL® English questionnaire is now available and can be used with confidence to better assess the disease burden associated with sarcopenia. It could also be used as a treatment outcome indicator in research.
authors: Public Health, Epidemiology and Health Economics, University of Liège, Avenue de l'Hopital 3, Liège 4000, Belgium.
authors: Charlotte
authors: C
authors: Beaudart
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.
authors: Mark
authors: M
authors: Edwards
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.
authors: Charlotte
authors: C
authors: Moss
authors: Public Health, Epidemiology and Health Economics, University of Liège, Liège, Belgium.
authors: Jean-Yves
authors: JY
authors: Reginster
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.
authors: Rebecca
authors: R
authors: Moon
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.|MRC Lifecourse Epidemiology Unit - University of Southampton, Southampton, United Kingdom of Great Britain and Northern Ireland.
authors: Camille
authors: C
authors: Parsons
authors: Department of Sport and Rehabilitation Sciences, University of Liège, Liège, Belgium.
authors: Christophe
authors: C
authors: Demoulin
authors: Division of Bone Diseases, Department of Internal Medicine Specialties, Geneva University Hospitals and Faculty of Medicine, Geneva 14, Switzerland.
authors: René
authors: R
authors: Rizzoli
authors: Division of Bone Diseases, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.
authors: Emmanuel
authors: E
authors: Biver
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.|Southampton General Hospital, MRC Resource Centre, Tremona Road, Southampton SO16 6YD, United Kingdom of Great Britain and Northern Ireland.
authors: Elaine
authors: E
authors: Dennison
authors: Epidemiology and Public Health, University of Liege, CHU Sart Tilman, Liege 4000, Belgium.
authors: Olivier
authors: O
authors: Bruyere
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, Hants, United Kingdom of Great Britain and Northern Ireland.|MRC Environmental Epidemiology Unit, University of Southampton, Southampton General Hospital Tremona Road, Southampton SO16 6YD, United Kingdom of Great Britain and Northern Ireland.
authors: Cyrus
authors: C
authors: Cooper
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D003430:Cross-Sectional Studies; D004644:Emotions; D004739:England; D005260:Female; D006304:Health Status; D006801:Humans; D008297:Male; D008603:Mental Health; D009043:Motor Activity; D009752:Nutritional Status; D011237:Predictive Value of Tests; D011379:Prognosis; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D055948:Sarcopenia / Q000175:diagnosis* / Q000503:physiopathology / Q000523:psychology; D011795:Surveys and Questionnaires; D014175:Translating
keywords: older people; quality of life; sarcopenia; translation; validation