Validation of the Spanish Version of the Knee Injury and Osteoarthritis Outcome Score (KOOS) for Elderly Patients With Total Knee Replacement

Abstract

The purpose of this study was to validate the Knee Injury and Osteoarthritis Outcome Score (KOOS) for elderly patients who undergo total knee replacement (TKR). The validated Spanish versions of the KOOS and Medical Outcomes Study 36‐Item Short‐Form Health Survey (SF‐36) questionnaires were applied to 137 patients (mean age 72.3, SD 7.5 years). Test–retest data were collected with an intermediate period of 1–2 weeks. To evaluate the clinimetric properties of the KOOS, internal consistency (Cronbach's α), reproducibility (intraclass correlation coefficient [ICC]), construct validity (Spearman's correlation), responsiveness (effect sizes [ES], and standardized response mean [SRM]), and floor and ceiling effects (<15%) were assessed. As result, Cronbach's coefficients of the KOOS subscales ranged from 0.78 to 0.93, and ICC from 0.76 to 0.91. Construct validity was supported by the confirmation of the three predefined hypotheses involving expected correlations between KOOS subscale and SF‐36 physical health subscales. Spearman's correlations were strong between KOOS Pain and SF‐36 Bodily Pain (r = 0.81), KOOS Pain and SF‐36 Physical Functioning (r = 0.67), KOOS activities of daily living (ADL) and SF‐36 Bodily Pain (r = 0.69), KOOS ADL and SF‐36 Physical Functioning (r = 0.74), and KOOS Sports/Recreation and SF‐36 Physical Functioning (r = 0.76). Responsiveness at 1 year after TKR was large with the ES ranging from 0.81 to 2.12, and the SRM from 0.70 to 1.91. Floor and ceiling effects were low. In conclusion, the Spanish version of KOOS has successful psychometric characteristics and is a reliable and valid instrument for assessment of patient‐relevant outcomes in elderly patients with advanced OA who undergo TKR. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 37:2157–2162, 2019

Quantitative preoperative patient assessments are related to survival and procedure outcome for osseous metastases

“…However, those instruments address different aspects of the patient experience. Therefore, the SF-36 remains relevant in oncology, in arthroplasty, and in spine, trauma, foot, sports, and upper extremity surgery, and it has the additional advantage of having been internationally validated [ [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] ]. Finally, as with all observational studies, it is possible that we are not accounting for an unobserved confounder.…”

Safety of Total Knee Arthroplasty in the Treatment of Knee Osteoarthritis and Its Effect on Postoperative Pain and Quality of Life of Patients

“…TNF- α and IL-1 β in combination can damage the knee joint function and enhance the sensitivity of pain receptor in patients. The pain receptor transmits the pain signal to sensory neuron till the sensory centre of cerebral cortex and makes patients feel more painful [ 24 – 27 ]. The study of scholar Christiansen M showed that TKA can reduce the concentration of TNF- α and IL-1 β in patients, so as to reduce the inflammatory transmitter produced by chondrocytes, with less pain and better recovery effect of knee joints [ 28 ].…”

“…e pain receptor transmits the pain signal to sensory neuron till the sensory centre of cerebral cortex and makes patients feel more painful [24][25][26][27].…”

Measures of Adult Knee Function

“…The KOOS is available in Egyptian Arabic, Saudi Arabian Arabic, Austrian German, Bengali (India), Czech, Hong Kong Chinese, Singapore Chinese, Croatian, Danish, Dutch, Estonian, English, Finnish, Filipino (Philippines), French, German, Greek, Hindi (India), Icelandic, Italian, Japanese, Kannada (India), Korean, Latvian, Lithuanian, Malayalam (India), Malay, Marathi (India), Norwegian, Persian, Portuguese, Brazilian Portuguese, Polish, Romanian, Russian, Singapore, Slovakian, Slovenian, Spanish, US Spanish, Peruvian Spanish, Swedish, Tamil (India), Telugu (India), Thai, Turkish, Ukrainian, Urdu (India), Vietnamese, Welsh, and Zulu. Validation of the cross‐cultural adaptations have been conducted and found adequate in the following languages : mainland Chinese , Singapore Chinese , Greek , Icelandic , Spanish , Dutch , French , Saudi Arabian Arabic , Hong Kong Chinese , Japanese , Persian , Portuguese , Russian, Singapore English , Thai , and Turkish .…”