ArticleOrthopaedic journal of sports medicine2025
Translation and Validation of the Spanish Version of the Norwich Patellofemoral Instability (NPI) Score.
Article in Orthopaedic journal of sports medicine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: The Norwich Patellofemoral Instability (NPI) score is a disease-specific questionnaire for patients with this condition; however, it has not been validated in Spanish-speaking patients. Purpose: To (1) translate the NPI score into Spanish and validate its psychometric properties and (2) to correlate it with the Spanish versions of the Kujala score and the Banff Patellofemoral Instability Instrument (BPII) 2.0. Study Design: Cohort study (Diagnosis); Level of evidence, 2. Methods: The translation and validation of the NPI score into Spanish were conducted following the Consensus-Based Standards for the Selection of Health Measurement Instruments guidelines. This included forward and backward translations, conciliation, and a pilot study in 5 patients. Internal consistency was evaluated using the Cronbach alpha and test-retest reliability using intraclass correlation coefficients (ICCs). Pearson correlation coefficients were used to calculate the correlation of the NPI score with Kujala and BPII scores. Results: The study included 58 voluntary participants, predominantly female (71%), with a mean ± SD age of 17.4 ± 6.6 years. The Spanish version of the NPI showed high internal consistency (Cronbach alpha, .93) and an ICC of 0.88 (95% CI, 0.80-0.92). Additionally, it exhibited a moderate negative correlation with the Kujala score (-0.57), and high negative correlation with the BPII score (-0.70). There was no ceiling or floor effect. Conclusion: Our study demonstrated that the Spanish version of the NPI score has high internal consistency and test-retest reliability, enabling its use in Spanish-speaking patients with patellar instability. It also demonstrated high correlation with another disease-specific score for patellofemoral instability (BPII 2.0) and moderate correlation with the Kujala score.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.