Influence of body mass index on patellofemoral pain / Influência do índice de massa corpórea na dor patelofemoral / Influencia del índice de masa corporal en el dolor patelofemoral

Abstract Introduction: Patellofemoral Pain Syndrome is characterized by retro-patellar and peripatellar pain during squatting, kneeling and running whose intensity can be related to Body Mass Index (BMI). Objective: To evaluate the relationship between overweight, pain and function in women with Patellofemoral Pain Syndrome (PFPS). Method: Cross-sectional observational study of fifty-four women with PFPS assessed in the period between January and December 2015, in the physiotherapy outpatient clinic of a tertiary hospital in the city of São Paulo. To verify the variables of pain at rest, at effort and function, the Numerical Pain Rating Scale (NPRS) and the Kujala Anterior Knee Pain Scale (AKPS) were used. The participants were divided into two groups, according to the BMI categories defined by the World Health Organization (WHO): Group 1, composed of women with normal BMI (18-24.9 kg/m²), with 36 patients, and group 2 composed of overweight women (25-29.9 k/m²), with 18 patients. Comparison between groups of pain at rest and effort and AKPS were performed using Student's t-test and Mann-Witney with statistical significance p < 0,05. Results: There was no statistically significant difference between groups for the pain at rest and effort and for AKPS. Conclusion: BMI does not impact pain intensity and function in women with PFPS.

Resumo Introdução: A síndrome da dor patelofemoral (SDPF) é por dor retropatelar e peripatelar ao subir e descer escadas, ajoelhar, agachar ou correr, cuja intensidade pode estar relacionada com o Índice de Massa Corpórea (IMC). Objetivo: Avaliar a relação entre o IMC, a dor e a função em mulheres com SDPF. Método: Estudo observacional transversal de 54 mulheres com SDPF avaliadas no período entre janeiro e dezembro de 2015, no ambulatório de fisioterapia de um hospital terciário da cidade de São Paulo. Para verificação das variáveis de dor ao repouso e ao esforço, foi utilizada a Escala Numérica de Dor e para a variável função, foi utilizada a escala Kujala de dor anterior no joelho. As participantes foram divididas em dois grupos, de acordo com o IMC, seguindo os critérios da Organização Mundial de Saúde (OMS): Grupo 1, composto por mulheres com IMC normal (18-24,9 kg/m²), com 36 pacientes, e o grupo 2 composto por mulheres com sobrepeso (25-29,9 kg/m²), com 18 pacientes. Foi realizada a comparação das médias de dor ao repouso e ao esforço e da escala Kujala de dor anterior no joelho entre os dois grupos, por meio dos testes t.-Student para amostras independentes e Mann-Witney, considerando significância estatística p < 0,05. Resultados: Não houve diferença estatisticamente significante entre os grupos para as variáveis de dor ao repouso, ao esforço e para a escala Kujala de dor anterior no joelho. Conclusão: O IMC não impacta na intensidade da dor e na função em mulheres com SDPF.

Resumen Introducción: El síndrome de dolor patelofemoral (SDPF) se caracteriza por dolor retropatelar y peripatelar al subir y bajar escaleras, arrodillarse o correr, cuya intensidad puede estar relacionada con el Índice de Masa Corporal (IMC). Objetivo: Evaluar la relación entre el IMC, el dolor y la función en mujeres con SDPF. Método: Estudio observacional transversal con 54 mujeres con SDPF evaluadas en el período entre enero y diciembre de 2015, en el ambulatorio de fisioterapia de un hospital terciario de la ciudad de São Paulo. Para verificación de las variables de dolor al reposo y al esfuerzo, se utilizó la Escala Numérica de Dolor, y para la variable función, se utilizó la escala Kujala de dolor existente en la rodilla. Las participantes se dividieron en dos grupos, de acuerdo con el IMC, siguiendo los criterios de la Organización Mundial de la Salud (OMS): grupo 1 compuesto por mujeres con IMC normal (18-24,9 kg/m²) con 36 pacientes, y el grupo 2 compuesto por mujeres con sobrepeso (25-29,9 kg/m²) con 18 pacientes. Se realizó la comparación de los promedios de dolor al reposo y al esfuerzo y de la escala entre los grupos, por medio de la prueba t de Student para las muestras independientes y de la prueba de Mann-Whitney, considerando significancia estadística p < 0,05. Resultados: No hubo diferencia estadísticamente significativa entre los grupos para las variables dolor al reposo, al esfuerzo y a la escala Kujala de dolor existente en la rodilla. Conclusión: El IMC no impacta en la intensidad del dolor y en la función de mujeres con SDPF.

Evolution and projection of knee arthroplasties from 2003 to 2030 in the state of São Paulo

SUMMARY OBJECTIVE Analyze data regarding total knee arthroplasty (TKA) carried out by the Public Health System (SUS) in the state of São Paulo from 2003 to 2010 and determine the projections expected for 2030. METHODS A cross-sectional study (observational). We analyzed 10,952 patients who underwent primary total knee arthroplasty (PTKA) and revision total knee arthroplasty (RTKA) in the state of São Paulo between 2003 and 2010. The collection of data based on ICD-10 and HAA (Hospital Admission Authorization) were provided by the Tabnet and Sigtap software (Management System for the Table of Procedures, Medications, and OPM by SUS). The following variables were analyzed: gender, number of PTKAs and RTKAs, and their projections. The information collected formed a database developed in Excel® for Windows, and the statistical analysis was performed by the Stata® 11 SE and Minitab 16 software. RESULTS There was a significant difference in the prevalence of TKA between genders (p<0.0001); most of the patients were females (7,891; 72%). The projection for 2030 when compared with the first year of the series, 2003, indicates a growth of 428% for PTKA and 1,380% for RTKA, with a greater increase percentage of RTKA in males than in females (1,558% and 1,318%, respectively). CONCLUSION The proportions of the RTKA projection are much greater than those of PTKA by 2030, with a greater percentage of increase of RTKA in males than in females.

RESUMO OBJETIVO Analisar os dados referentes às artroplastias totais de joelho (ATJ) realizadas pelo Sistema Público de Saúde (SUS) no estado de São Paulo de 2003 a 2010 e determinar as projeções esperadas para 2030. MÉTODOS Estudo transversal (observacional). Foram analisados 10.952 pacientes que realizaram artroplastia total de joelho primária (ATJP) e revisão (ATJR) no estado de São Paulo entre 2003 e 2010. A coleta de dados baseados no CID-10 e AIH (Autorização de Internação Hospitalar) foram fornecidos pelo programa Tabnet e Sigtap (Sistema de Gerenciamento da Tabela de Procedimentos, Medicamentos e OPM do SUS). Foram analisadas as seguintes variáveis: gênero, número de ATJP e número de ATJR, além de suas projeções. As informações coletadas formaram um banco de dados desenvolvido no programa Excel® for Windows e a análise estatística foi realizada pelos softwares Stata® 11 SE e Minitab 16. RESULTADOS Houve diferença significativa na prevalência da ATJ entre os gêneros (p<0,0001), sendo a maioria do gênero feminino (7.891; 72%). A projeção para 2030 quando comparado com o primeiro ano da série, 2003, indica um crescimento de 428% para as ATJP e 1.380% nas ATJR, com uma porcentagem de aumento maior nas ATJR no gênero masculino do que no feminino (1.558% e 1.318%, respectivamente). CONCLUSÃO As proporções de projeção da ATJR se mostram muito maiores do que nas ATJP até o ano de 2030, percebendo-se uma porcentagem de aumento maior de ATJR no gênero masculino comparado ao feminino.

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

ABSTRACT BACKGROUND: The Norwich Patellar Instability (NPI) score is a tool for evaluating the impact of patellofemoral instability on joint function. It has not been translated or culturally adapted for the Brazilian population before. OBJECTIVE: This study had the aims of translating and culturally adapting the NPI score for use in Brazilian Portuguese and subsequently assessing its validity for this population. DESIGN AND SETTING: Translation, cross-cultural adaptation and validation study conducted at the State Public Servants' Institute of São Paulo, Brazil. METHODS: Sixty patients of both sexes (aged 16-40 years) with diagnoses of patellar dislocation were recruited. The translation and cultural adaptation were undertaken through translation into Brazilian Portuguese and back-translation to English by an independent translator. Face validity was assessed by a committee of experts and by 20 patients. Concurrent validity was assessed through comparing the Brazilian Portuguese NPI score with the Brazilian Portuguese versions of the Lysholm knee score and the Kujala patellofemoral disorder score among the other 40 patients. Correlation analysis between the three scores was performed using Pearson correlation coefficients with significance levels of P < 0.05. RESULTS: The Brazilian Portuguese version of the NPI score showed moderate correlation with the Brazilian Portuguese versions of the Lysholm score (r = -0.56; 95% confidence interval, CI: -0.74 to -0.30; P < 0.01) and Kujala score (r = -0.57; 95% CI: -0.75 to -0.31; P < 0.01). CONCLUSION: The Brazilian Portuguese version of the NPI score is a validated tool for assessing patient-reported patellar instability for the Brazilian population.

Influence of body mass index in revision total knee arthroplasty

ABSTRACTOBJECTIVE: To evaluate the influence of the body mass index (BMI) on the functional assessment of patients who underwent revision total knee arthroplasty (RTKA).METHODS: Thirty patients who un-derwent RTKA between January 2008 and January 2012 were retrospectively assessed using the WOMAC questionnaire. The patients were divided into three groups according to the BMI ca-tegories defined by the World Health Organization (WHO): Group I with normal BMI (18-24.9 Kg/m2), with eight patients; Group II, overweight (BMI 25-29.9 Kg/m2), with 15 patients, and Group III obesity with BMI ≥ 30 Kg/m2, with seven patients. The post-ope-rative function scores obtained through the WOMAC questionnaire were compared with the BMI of each group. The statistical analysis between BMI and WOMAC scores was performed with the Spe-arman correlation test.RESULTS: The average functional WOMAC score for individuals in Group I was 16.7; in Group II it was 47.7; and in Group III it was 69.9, with a statistically significant differen-ce between groups I, II and III (p< 0.0001).CONCLUSION: Patients with BMI > 25 Kg/m2 had a worse functional evaluation through WOMAC scores when compared to patients with normal BMI after RTKA. Level of Evidence III, Tranversal Retrospective Study.