Propriedades clinimétricas do Knee Extension Prone Test (KEPT): um novo método para avaliar o déficit de hiperextensão do joelho

Abstract

BACKGROUND: The loss of the final knee hyperextension ROM is one of the main consequences after an injury to this joint, and this sequel causes important biomechanical changes and functional impairment. Inclinometry applications for smartphones are low-cost instruments that can determine the knee hyperextension deficit based on the difference in inclination between the lower limbs in prone position. OBJECTIVE: To analyze the concurrent validity and reliability of a new method for assessing knee extension prone test (KEPT). METHODS: Cross-sectional study of reliability. Two examiners performed the evaluations: 1. Lateral knee goniometry; 2. Anterior tibial inclinometry; 3. Lateral supine photogrammetry; 4. Lateral photogrammetry in prone; 5. Inclinometry on a base between the heels in the prone position (proposed new method - KEPT). The individuals were divided into two groups, G1: Healthy, and G2: With history of knee injury. Concurrent KEPT validity and intra- and inter-examiner reliability were analyzed using Pearson's linear correlation coefficient (r) and intraclass correlation coefficient (ICC). RESULTS: KEPT demonstrated excellent intra and inter-examiner reliability. The standard error of measurement was 0.47 ° and 1.30 °, whereas the minimum detectable change was 2.35 and 6.5 ° in the intra and interexaminer comparison respectively. KEPT validity ranged from moderate to good (p <0.01). CONCLUSION: KEPT has been shown to be valid and reliable for assessing knee hyperextension deficit in both healthy individuals and patients with knee injuries.