Translation, cross-cultural adaptation and validation of the Norwich Patellar Instability score for use in Brazilian Portuguese

Arrebola, Lucas Simões; Campos, Túlio Vinícius de Oliveira; Smith, Toby; Pereira, André Lourenço; Pinfildi, Carlos Eduardo

doi:10.1590/1516-3180.2018.0393280119

Cited by 4 publications

(5 citation statements)

References 29 publications

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“…Both the NPI Score [2] and Banff Score, [16] the two PROMS designed to assess patellar instability, have been largely evaluated from their host institutions in Norwich [2,6] and Banff. [14,17,18,19] This study augments that of Arebola et al's [20] work to present findings from an independent centre. In both instances, the NPI Score has demonstrated strengths and provides further support for its adoption in clinical practice.…”

Section: Discussionsupporting

confidence: 75%

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Psychometric properties of the Norwich Patellar Instability Score in people with recurrent patellar dislocation

et al. 2019

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Background: Patellar dislocations account for 2% of all knee injuries with a 17% chance of redislocation. There are few validated scores specific to instability. One of these is the Norwich Patellar Instability Score. There has been limited assessment of the validity, floor-ceiling effect and responsiveness of the Norwich Patellar Instability (NPI) Score from an independent centre. The purpose of this paper is to address this limitation.Methods: Data from 90 patients referred to a tertiary referral patellofemoral clinic were analysed. All routinely completed data including NPI Score, Kujala Patellofemoral Disorder Score, and demographic outcomes during appointments, up to 36 months following initial clinical assessment was analysed. Convergent validity was assessed by correlating outcomes of the Kujala Patellofemoral Disorder Score to the NPI Score. Effect size (ES) was determined between baseline to 12-month and 12 to 36-month assessments to determine responsiveness. Floor-ceiling effect was evaluated at baseline, 12-month and 12 to 36-month follow-up.Results: NPI Score demonstrated good convergent validity to the Kujala Patellofemoral Disorder Score (p<0.001; 95% confidence interval (CI): -0.71 to -0.52). NPI Score demonstrated good responsiveness to change both between baseline to 12 months (ES: 0.43; 95% CI: 0.42 to 0.10) and 12 to 36 months (ES: 0.67; 95% CI: 0.60 to 0.15). Whilst the NPI Score did not demonstrate a ceiling effect, there was moderate risk of a floor-effect where 13% of the cohort reported the lowest levels of NPI scores. Conclusions:The NPI Score is a valid and responsive outcome for people with recurrent patellar dislocation.

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Section: Discussionsupporting

confidence: 75%

“…Continued analyses to assess the psychometric properties of the NPI score with other populations would be valuable. This will build on Arreola et al's [20] work of cultural adoption of the NPI Score, but would be valuable to maximise its adoption to measure patellar instability worldwide for both adult and paediatric cohorts.…”

Section: Discussionmentioning

confidence: 99%

Psychometric properties of the Norwich Patellar Instability Score in people with recurrent patellar dislocation

et al. 2019

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“…Although the content of these scales differs, their core aims are to assess the functional abilities of patients. If one of the scales was considered to be the gold standard in the assessment of certain diseases and the other scale was effective and highly correlated to the “gold standard” scale, then clinically, both scales could be treated as having the same effectiveness in the assessment of diseases [ 29 , 30 ]. Hence, to an extent, the findings of this study suggest that the Opti_knee gait system has similar abilities as the biplanar fluoroscopy system in the assessment of knee kinematics.…”

Section: Discussionmentioning

confidence: 99%

Validation of a portable marker-based motion analysis system

et al. 2021

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Background The Opti_Knee system, a marker-based motion capture system, tracks and analyzes the 6 degrees of freedom (6DOF) motion of the knee joint. However, the validation of the accuracy of this gait system had not been previously reported. The objective of this study was to validate and the system. Two healthy subjects were recruited for the study. Methods The 6DOF kinematics of the knee during flexion–extension and level walking cycles of the knee were recorded by Opti_Knee and compared to those from a biplanar fluoroscopy system. The root mean square error (RMSE) of knee kinematics in flexion–extension cycles were compared between the two systems to validate the accuracy at which they detect basic knee motions. The RMSE of kinematics at key events of gait cycles (level walking) were compared to validate the accuracy at which the systems detect functional knee motion. Pearson correlation tests were conducted to assess similarities in knee kinematic trends between the two systems. Results In flexion–extension cycles, the average translational accuracy (RMSE) was between 2.7 and 3.7 mm and the average rotational accuracy was between 1.7 and 3.8°. The Pearson correlation of coefficients for flexion–extension cycles was between 0.858 and 0.994 for translation and 0.995-0.999 for angles. In gait cycles, the RMSEs of angular knee kinematics were 2.3° for adduction/abduction, 3.2° for internal/external rotation, and 1.4° for flexion/extension. The RMSEs of translational kinematics were 4.2 mm for anterior/posterior translation, 3.3 mm for distal/proximal translation, and 3.2 mm for medial/lateral translation. The Pearson correlation of coefficients values was between 0.964 and 0.999 for angular kinematics and 0.883 and 0.938 for translational kinematics. Conclusion The Opti_Knee gait system exhibited acceptable accuracy and strong correlation strength compared to biplanar fluoroscopy. The Opti _Knee may serve as a promising portable clinical system for dynamic functional assessments of the knee.

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“…The correlation was r = 0.63 for Lysholm knee score and NPI in the author's other study, which included patients with patellar dislocation for the first time [ 31 ]. In the Brazilian Portuguese translation study, these values were = −0.57 for the Kujala score and r = −0.56 for the Lysholm score [ 25 ]. In the Dutch translation of NPI, the correlation with Kujala was found to be r = −0.78, similar to our study.…”

Section: Discussionmentioning

confidence: 99%

“…Higher scores from NPI show PF instability is more restricting for the patient, indicating a poor result. NPI was translated and adapted to Dutch and Brazilian Portuguese [ 21 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

Translation, reliability and validity of the Turkish versions of Norwich Patellar Instability score and The Banff Patellar Instability Instrument 2.0

Yilmaz,

Goymen,

Oral

et al. 2024

J Orthop Surg Res

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Background Current treatment options for patellofemoral (PF) instability have required functional scoring systems. The Banff Patellar Instability Instrument (BPII) 2.0 and Norwich Patellar Instability (NPI) scores were explicitly created to meet the need to evaluate PF instability. Different patient-reported outcome measurements (PROMs) are used to evaluate anterior knee problems. Objectives To test the validity and reliability of the Turkish version of the BPII 2.0 and NPI score. Study design and methods Fifty-one patients that operated for PF instability, older than eighteen years old, were included in this study. Turkish translation of the BPII 2.0 and NPI scores was undertaken through translation into Turkish by an independent translator. Two tests were repeated seven days apart. Intraclass correlation coefficient (ICC) was used for test–retest reliability. Internal consistency was analyzed using Cronbach's alpha. Validity was assessed by correlating the Kujala and Lysholm knee scores. Results Fifty-one patients (34 females/17 males), the average age was 25 ± 7, were included in this study. Cronbach's alpha value was 0.829 for BPII 2.0 and 0.843 for NPI for the first time answered by patients. ICC values applied to evaluate test–retest reliability were 0.904 (p < 0.05) for BPII 2.0 and 0.915 (p < 0.05) for NPI. There was a moderate correlation between the BPII 2.0 Turkish version and the Kujala score. There was a very high correlation between the Turkish version of the BPII 2.0 and Lysholm knee scores. An excellent negative correlation was found between Norwich and Kujala scores (r = −0.819, p < 0.05). The correlation coefficient between Norwich and Lysholm scores was −0.662, indicating a high negative correlation (p < 0.05). The correlation coefficients between the Turkish version of BPII 2.0 and NPI were −0.533 (p < 0.05). Conclusions The Turkish version of the BPII 2.0 and NPI score is a reliable and valid instrument for Turkish-speaking patients with patellofemoral instability.

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Translation, cross-cultural adaptation and validation of the Norwich Patellar Instability score for use in Brazilian Portuguese

Cited by 4 publications

References 29 publications

Psychometric properties of the Norwich Patellar Instability Score in people with recurrent patellar dislocation

Psychometric properties of the Norwich Patellar Instability Score in people with recurrent patellar dislocation

Validation of a portable marker-based motion analysis system

Translation, reliability and validity of the Turkish versions of Norwich Patellar Instability score and The Banff Patellar Instability Instrument 2.0

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