IJCS | Volume 32, Nº2, March/April 2019

139 Morais and Rassi Six-minute walk test in heart failure Int J Cardiovasc Sci. 2019;32(2)134-142 Original Article Table 5 - Predictors of the six-minute walk distance by hierarchical categories Models Predictors R 2 Beta Standard error t p Psychologic BAI 0.02 -0.18 1.23 -1.20 0.234 BDI 0.07 1.34 0.49 0.628 Quality of life Physical QL 0.06 -0.04 2.86 -0.11 0.911 Emotional QL 0.37 4.12 1.48 0.143 Total QL -0.44 1.94 -0.94 0.350 Sociodemographic Age -0.30 0.78 -2.78 0.007 Sex 0.28 -0.29 20.24 -2.69 0.009 Ethnics 0.04 21.95 0.40 0.691 Working 0.13 26.81 1.19 0.238 Income -0.01 43.58 -0.13 0.897 Marital status 0.24 20.15 2.19 0.032 Smoking 0.02 34.19 0.15 0.883 Alcohol consumption -0.01 26.73 -0.14 0.893 Clinical aspects Number of hospitalizations 0.40 -0.21 13.82 -1.67 0.099 Time of diagnosis -0.14 26.74 -1.12 0.268 Chagas’ heart disease 0.10 26.01 0.73 0.469 Number of medications 0.03 7.25 0.23 0.819 Charlson -0.23 9.22 -1.76 0.084 LVEF 0.13 1.87 0.93 0.357 LVDD -0.04 2.09 -0.28 0.784 BMI -0.22 2.27 -1.65 0.104 MAP 0.08 0.90 0.62 0.535 HR 0.16 0.97 1.19 0.238 Physical functional parameters mMRC 0.33 -0.37 10.00 -3.73 < 0.001 IPAQ 0.15 18.41 1.47 0.145 % MIP. 0.14 0.49 1.14 0.256 % MEP. 0.15 0.34 1.20 0.234 % HGS -0.33 0.55 -3.18 0.002 % FVC 0.15 0.54 1.38 0.171 FEV1/FVC 0.01 0.82 0.09 0.929 BAI: Beck anxiety inventory; BDI: Beck depression inventory; QV: quality of life; LVEF: left ventricular ejection fraction; LVDD: left ventricular diastolic diameter; LVSD: left ventricular systolic diameter; BMI: body mass index; MAP: mean arterial pressure; HR: heart rate; mMRC: Medical Research Council modified dyspnea scale; IPAQ: International Physical Activity Questionnaire; MIP: maximal inspiratory pressure; MEP: maximal expiratory pressure; HGS: handgrip strength; FVC: forced vital capacity; FEV1: forced expiratory volume in 1 second.