Reference values and equation for the Upper Extremity Function – Simplified test

Abstract

<b>Background:</b> Functional tests have been widely used in clinical practice. However, despite being a valid and useful functional test, the Upper Extremity Function – simplified version (UEF_S) test does not count with reference values. <b>Aims:</b> To propose reference values and equation for the UEF_S test. <b>Methods:</b> A cross-sectional data collection was carried out simultaneously across four different regions of Brazil (Londrina, São Paulo, Campo Grande and Fortaleza). Subjects with normal lung function performed the UEF_S test on the dominant upper limb and the maximum number of elbow flexions (repetitions) in 20sec was used as outcome. The length of the dominant upper limb (DUL) was also measured. <b>Results:</b> 296 individuals (45% men, age 53 [34-65] years, FEV1/FVC 103 [97-106] %pred) were studied. Two reference equations were developed: (equation_1) UEF_S= 14.746 + (age*0.262) + (height*0.069) + (DUL*0.065); and (equation_2) UEF_S= 14.152 + (age*0,270) + (height*0,143). Regression models (stepwise method) showed R2 values of 0.34 and 0.32, respectively. Reference values were also expressed in the table as mean, standard error, 95% confidence interval and lower limit of normality (10th percentile) for each age group of 10 years, separated by sex. <b>Conclusions:</b> Reference values for UEF_S test were provided and might help researchers and clinicians to identify and interpret upper limb dysfunction with a simple test.