[en] Purpose To facilitate the measurement of quality of life in sarcopenia, we set out to reduce the number of items in the
previously validated Sarcopenia Quality of Life (
SarQoL®) questionnaire, and to evaluate the clinimetric properties of this
new short form.
Methods The item reduction process was carried out in two phases. First, information was gathered through item-impact
scores from older people (n = 1950), a Delphi method with sarcopenia experts, and previously published clinimetric data. In
the second phase, this information was presented to an expert panel that decided which of the items to include in the short
form. The newly created SFSarQoL was then administered to older, community-dwelling participants who previously participated
in the SarcoPhAge study. We examined discriminative power, internal consistency, construct validity, test–retest
reliability, structural validity and examined item parameters with a graded response model (IRT).
Results The questionnaire was reduced from 55 to 14 items, a 75% reduction. A total of 214 older, community-dwelling
people were recruited for the validation study. The clinimetric evaluation showed that the SF-SarQoL® can discriminate
on sarcopenia status [EWGSOP2 criteria; 34.52 (18.59–43.45) vs. 42.86 (26.56–63.69); p = 0.043], is internally consistent
(α = 0.915, ω = 0.917) and reliable [ICC = 0.912 (0.847–0.942)]. A unidimensional model was fitted (CFI = 0.978;
TLI = 0.975; RMSEA = 0.108, 90% CI 0.094–0.123; SRMR = 0.055) with no misfitting items and good response category
separation.
Conclusions A new, 14-item, short form version of the Sarcopenia Quality of Life questionnaire has been developed and
shows good clinimetric properties.
Disciplines :
Public health, health care sciences & services
Author, co-author :
Geerinck, Anton ; Université de Liège - ULiège > Département des sciences de la santé publique > Santé publique, Epidémiologie et Economie de la santé
Beaudart, Charlotte ; Université de Liège - ULiège > Département des sciences de la santé publique > Santé publique, Epidémiologie et Economie de la santé
Reginster, Jean-Yves ; Université de Liège - ULiège > Département des sciences de la santé publique > Santé publique, Epidémiologie et Economie de la santé
Locquet, Médéa ; Université de Liège - ULiège > Département des sciences de la santé publique > Epidémiologie clinique
Monseur, Christian ; Université de Liège - ULiège > Département des Sciences de l'éducation > Psychométrie et édumétrie
GILLAIN, Sophie ; Centre Hospitalier Universitaire de Liège - CHU > Département de médecine interne > Service de gériatrie
Bruyère, Olivier ; Université de Liège - ULiège > Département des sciences de la santé publique > Santé publique, Epidémiologie et Economie de la santé
Language :
English
Title :
Development and validation of a short version of the Sarcopenia Quality of Life questionnaire: the SF‑SarQoL
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