Reliability, validity and responsiveness of the Portuguese version of the Knee injury and Osteoarthritis Outcome Score – Physical Function Short-form (KOOS-PS)

Gonçalves, Rui Soles; Cabri, Jan; Pinheiro, João Páscoa; Ferreira, Pedro Lopes; Gil, João

doi:10.1016/j.joca.2009.10.012

Cited by 38 publications

(44 citation statements)

References 15 publications

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“…KOOS's reliability for the five subscales of the questionnaire post-operatively was excellent. Our findings are in agreement with results from the Portuguese [15], French [14] and Singapore [35] versions. High Cronbach' a for the five subscales and the 35 items confirmed excellent internal consistency of the Greek version with a 10 day's interval.…”

Section: Discussionsupporting

confidence: 93%

“…High Cronbach' a for the five subscales and the 35 items confirmed excellent internal consistency of the Greek version with a 10 day's interval. Results for internal consistency are in accordance with previously validated versions in other languages such as Portuguese [15], Chinese [35], French [14], Dutch [37] in knee OA patients using a time interval of 48 h, 6 days, 2 and 3 weeks respectively. Similarly, dimensionality was generally supported as the item-to-subscale correlation were satisfactory, indicating that each item was closely related to its subscale.…”

Section: Discussionsupporting

confidence: 84%

“…Similar results for this subdomain were found in the French version [14] with 3 months follow-up. However, the Portuguese KOOS [15] showed moderate correlations in all subscales (0.41-0.69) including Sports/Rec, however patients were younger in age (66.5 ± 10.8) compared to our study (72.1 ± 6.88 years) and reassessment measurements were taken at 4 weeks, where patients are believed to have achieved higher levels of improvement. Hypotheses for divergent validity were confirmed with KOOS pain and symptoms not correlating with SF-12 mental.…”

Section: Discussioncontrasting

confidence: 70%

“…In this article, the process of cross-cultural adaptation was presented with no major issues arising, resulting to a thorough, complete and comprehensible Greek version of the KOOS, likewise other previously adapted versions in several languages [14,15,[34][35][36]. KOOS Greek version (downloadable at the official site http://www.koos.nu/koosgreek.pdf) was used in this study.…”

Section: Discussionmentioning

confidence: 99%

“…It has already been validated in Swedish [13], French [14], Portuguese [15], in knee osteoarthritis patients. Within Greece, there is a gap in the literature regarding self-reported questionnaires to evaluate functional status of osteoarthritis (OA) patients, or patients' progress pre-operatively and post-operatively.…”

Section: Introductionmentioning

confidence: 99%

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Cross-cultural translation and validation of the Greek version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) in patients with total knee replacement

Moutzouri¹,

Tsoumpos

Billis³

et al. 2014

Disability and Rehabilitation

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OBJECTIVES:The aim of this study was to assess the validity, reliability and responsiveness of the developed Greek version of the KOOS in total knee replacement (TKR) patients. METHODS:For the translation procedure, guidelines for cross-cultural adaptation were followed (Beaton et al, 2000). KOOS was translated into Greek independently by 3 Greek native raters (2 physiotherapists with > 5 years of clinical musculoskeletal experience and one Orthopedic surgeon).The 3 raters had a meeting where all translations were discussed and a consensus was achieved to a preliminary (synthesis) version. This version was utilized for a backtranslation (Greek to English) by another rater, an English native professional translator who had no prior knowledge of the KOOS. The synthesis and back translation were discussed in a second meeting and a consensus on a prefinal Greek version of KOOS was reached. This prefinal version was tested in a pilot study. It was administered to 10 total knee replacement (TKR) patients with variable educational levels, to confirm the comprehensibility and syntax of all questions. Following the pilot, a final meeting was organized, where all raters discussed the comments made by the patients within the pilot. There were only two points of discussion regarding a) question P4 & P5, the translation and comprehension of full flexion and extension by patients b) the translation of the word «extreme» , the 5th point of the Likertscale in questions S6-Q4. Thus, following this meeting the final version of Greek KOOS questionnaire was developed. Validation procedure:For exploring validity, reliability and responsiveness of KOOS Greek version, 51 consecutive TKR patients (mean age 72.2±7.2 years, 39 women) within the University Hospital of Patras, Greece participated in the study. KOOS's psychometric properties were evaluated according to the COSMIN checklist.Preoperative clinical status and postoperative outcomes at 2 occasions (at discharge and 10-12 days postoperatively) were evaluated using the Greek versions of the KOOS, KOS-ADL, and SF-12 Health Survey. Psychometric properties of both Greek versions of KOS-ADL and SF-12 have been previously tested and have been found satisfactory (Roos et al, 1998, Goncalves et al, 2009). All questionnaires were administered by one orthopedic surgeon. Questionnaires were self-filled.For the analysis, criterion-related validity was evaluated by Pearson's correlation. Internal consistency by Cronbach's alpha; Reliability, by intra-class correlation coefficient (ICC).The SEM was calculated on the basis of the error variance, whereas responsiveness was calculated by effect size, standardized response mean (SRM) and by relating the smallest detectable change (SDC) with the minimal important difference (MIC). RESULTS:Internal consistency: Internal consistency was excellent with Cronbach's a being 0.801 preoperatively, and 0.920 at discharge and at 2 weeks after TKR. Chronbach's a for the 5 subscales of KOOS was found 0.785 preoperatively, 0.822 at discharge and 0.781 at 2 wee...

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Section: Discussionsupporting

confidence: 93%