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Psychometric evaluation of the shortened version of the Functional Difficulties Questionnaire to assess thoracic physical function.

Abstract：

OBJECTIVE:The aim of this study was to investigate the psychometric properties of the shortened version of the Functional Difficulties Questionnaire (FDQ). DESIGN:This is a multisite observational study. SETTING:The study was conducted in four tertiary care hospitals in Australia. SUBJECTS:A total of 225 participants, following cardiac surgery, were involved in the study. INTERVENTION:Participants completed the original 13-item FDQ and other measures of physical function, pain and health-related quality of life. METHOD:Item reduction was utilized to develop the shortened version. Reliability was evaluated using intraclass correlation coefficients (ICCs), the smallest detectable change and Bland-Altman plots. The validity and responsiveness were evaluated using correlation. Anchor and distribution-based calculation was used to calculate the minimal clinical important difference (MCID). RESULTS:Item reduction resulted in the creation of a 10-item shortened version of the questionnaire (FDQ-s). Within the cohort of cardiac surgery patient, the mean (SD) for the FDQ-s was 38.7 (19.61) at baseline; 15.5 (14.01) at four weeks and 7.9 (12.01) at three months. Validity: excellent internal consistency (Cronbach's α > 0.90) and fair-to-excellent construct validity (>0.4). Reliability: internal consistency was excellent (Cronbach's α > 0.8). The FDQ-s had excellent test-retest reliability (ICC = 0.89-0.92). Strong responsiveness overtime was demonstrated with large effect sizes (Cohen's d > 1.0). The MCID of the FDQ-s was calculated between 4 and 10 out of 100 (in cm). CONCLUSION:The FDQ-s demonstrated robust psychometric properties as a measurement tool of physical function of the thoracic region following cardiac surgery.

journal_name

Clin Rehabil

journal_title

Clinical rehabilitation

authors

Katijjahbe MA,Denehy L,Granger CL,Royse A,Royse C,Logie S,Sturgess T,Md Ali NA,McManus M,Sandy CE,El-Ansary D

doi

10.1177/0269215519879476

subject

Has Abstract

pub_date

2020-01-01 00:00:00

pages

132-140

issue

eissn

0269-2155

issn

1477-0873

journal_volume

pub_type

杂志文章,多中心研究

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Psychometric evaluation of the shortened version of the Functional Difficulties Questionnaire to assess thoracic physical function.