Validación al español del instrumento Self-Administered Patient Satisfaction Scale (SAPS) para reemplazo total de cadera o de rodilla / Validation of the spanish version of the self-administered patient satisfaction scale (sAPs) for total hip and knee arthroplasty

Introducción: La satisfacción del paciente es un indicador importante al evaluar los resultados clínicos de un reemplazo total de cadera o rodilla. El objetivo de este estudio fue validar al idioma español el instrumento Self-Administered Patient Satisfaction Scale (SAPS) para reemplazo total de cadera o rodilla, y estudiar sus propiedades psicométricas. materiales y métodos: Se realizó un estudio de validación de corte transversal para evaluar el contenido, la consistencia interna y la validez de criterio de la SAPS. Se incluyó a 105 pacientes con reemplazo total de cadera o rodilla. La validez de criterio fue valorada con las escalas WOMAC (Western Ontario and McMaster Universities Osteoarthritis Index) y SF-36 (36-Item Short Form Survey). Resultados: Se analizó a 50 pacientes con reemplazo total de cadera y 55 con reemplazo total de rodilla y una mediana de seguimiento de 14 meses (rango intercuartílico, 11-19), con una edad de 71.3 ± 11.6 años; 73,3% (77) eran mujeres. El coeficiente alfa de Cronbach fue de 0,797 indicando una consistencia interna aceptable. La correlación entre las escalas SAPS y WOMAC fue moderada (coeficiente de Spearman 0,488; p <0,05), al igual que con el componente físico de la SF-36 (coeficiente de Spearman 0,525; p <0,05). Conclusión: La versión en español de la SAPS es una herramienta válida y confiable para medir el grado de satisfacción de los pacientes sometidos a reemplazo total de cadera o rodilla, tiene propiedades psicométricas similares a las de la escala original. Nivel de Evidencia: II

Introduction: Patient satisfaction is an important parameter when evaluating clinical outcomes after total hip (THA) or knee (TKA) arthroplasty. The objective of this work was to validate the Spanish version of the Self-Administered Patient Satisfaction scale (SAPS) for THA or TKA, as well as to study its psychometric properties. materials and methods: A cross-sectional validation study was carried out to evaluate the content, internal consistency, and criterion validity of the SAPS scale. A total of 105 subjects who were treated with THA or TKA were included. Criterion validity was assessed with the WOMAC scale (Western Ontario and McMaster Universities Osteoarthritis Index) and SF-36 (Short Form 36 Health Survey). Results: Fifty patients undergoing THA and 55 undergoing TKA were analyzed at a median follow-up of 14 months (Interquartile range, 11-19) after surgery, with a mean age of 71.3 ± 11.6 years; 73.3% (77) were women. Cronbach's alpha was 0.797, indicating an acceptable internal consistency. A moderate correlation was found between the SAPS scale and the WOMAC scale (Spearman's coefficient: 0.488, p <0.05), as well as with the physical component of the SF-36 (Spearman's coefficient: 0.525, p <0.05). Conclusion: The Spanish version of the SAPS scale is a valid and reliable tool to measure patient satisfaction after THA or TKA, with psychometric properties similar to those of the original scale. Level of Evidence: II

Relationship between Body Mass Index and Complications during the First 45 Days after Primary Total Hip and Knee Replacement: A Single-Center Study from South America.

BACKGROUND: The goal of this study was to evaluate the relationship between body mass index (BMI) and early complications of total hip replacement (THR) and total knee replacement (TKR). METHODS: This is a retrospective study of patients who underwent primary THR and TKR between January 2011 and December 2015. We included patients between 18 and 90 years of age with BMI less than 40 kg/m2 with a minimal postoperative follow-up time of 45 days. The primary outcomes were the presence of infection, mechanical complications (dislocation, fractures, arthrofibrosis, or neuropraxia), and thromboembolic events. Overweight and obesity were defined as a BMI of 25-29.9 kg/m2 and ≥ 30 kg/m2, respectively. RESULTS: In total 750 patients were included (THR, 268; TKR, 482) with a mean age of 65.0 ± 12.4 years. The percentage of patients with normal weight, overweight, and obesity was 24.9% (n = 187), 41.7% (n = 313), and 33.4% (n = 250), respectively. The early complication rate was 8.9% (95% confidence interval [CI], 7.1% to 11.2%). Infection and mechanical complications were most prevalent. There was no statistically significant relationship between the incidence of complications and BMI (obesity vs. normal weight: hazard ratio [HR], 1.49; 95% CI, 0.72 to 3.06; p = 0.282); however, there was a tendency toward a greater risk of infectious complications in the patients with obesity (HR, 6.08; 95% CI, 0.75 to 49.16; p = 0.090). Patients with diabetes mellitus (DM) had more risk of infectious complications than those without DM (HR, 2.60; 95% CI, 1.00 to 6.79). CONCLUSIONS: There was no statistical relationship between BMI and early complications of THR and TKR. Nonetheless, there was a tendency toward a higher risk of infection in patients with some degree of obesity.