IJCS | Volume 32, Nº2, March/April 2019

137 Table 1 - Clinical and sociodemographic characteristics of the study group Variable Mean or median n Standard deviation or interquartile range % Sociodemographic Non-caucasian 60 74.1% Working 12 14.8% Income < 3 minimum wages (Brazilian reals) 77 95.1% Married/with companion 47 58% Echocardiographic LVEF (%) 33.3 7.3 LVSD (mm/m 2 ) 54.3 6.7 LVDD (mm/m 2 ) 64.0 6.5 FC I 15 18.5% FC II 60 74.1% FC III 6 7.4% Time of diagnosis > 2 years 59 72.8% Number of hospitalizations 0.43 0.82 No previous hospitalization 57 29.6% Heart rate (bpm) 66.0 60.0 - 79.5 MAP (mmHg) 94.5 13.6 BMI (kg/m 2 ) 25.7 23.5 - 30.1 Drugs 5.0 4.0 - 6.0 Charlson index 3.0 2.5 - 4.0 Etiology of HF Chagas disease 35 43.2% Idiopathic 15 18.5% Hypertensive 10 12.3% LVEF: left ventricular ejection fraction; LVSD: left ventricular systolic diameter; LVDD: left ventricular diastolic diameter; FC: functional class; MAP: mean arterial pressure. Table 2 - Emotional and physical functional characteristics, quality of life, and six-minute walk test parameters Variable Mean or median n Standard deviation or interquartile range % Emotional features BAI 14.0 6.2 - 23.0 BDI 10.5 7.0 - 18.0 MLHFQ Total QOL 35.4 21.8 Physical 17.5 7.0 - 23.0 Emotional 5.0 3.0 - 10.0 Physical activity level Sedentary 46 56.8% Active 35 43.2% mMRC 1 42 51.9% 2 17 21% 3 9 11.1% 4 1 1.2% MIP (cmH 2 O) 72.6 26.0 % MIP 72.1 21.8 < 80 cmH 2 O 49 60.5% MEP (cmH 2 O) 102.9 43.6 % MEP 95.8 33.6 % HGS 85.3 17.1 HGS (kgf) 31.9 8.4 % FVC 102.8 17.7 % LVEF1 95.1 22.3 FEV 1 /FVC (%) 77.0 72.0 - 81.7 6MWD (m) 445.1 90.8 > 300 m 78 96.3% > 450 m 47 58% % 6MWD 79.7 14.6 Borg scale 2.0 1.25 - 4.0 BAI: beck anxiety inventory; BDI: beck depression inventory; MLHFQ: Minnesota Living with Heart Failure Questionnaire; QOL: quality of life; MIP: maximal inspiratory pressure; MEP: maximal expiratory pressure; HGS: handgrip strength; FVC: forced vital capacity; FEV1: forced expiratory volume in 1 second; FVC: forced vital; LVEF: left ventricular ejection fraction; 6MWD: distance covered during the six-minute walk test. Morais and Rassi Six-minute walk test in heart failure Int J Cardiovasc Sci. 2019;32(2)134-142 Original Article 6MWD was shorter in female participants with functional class II and III and in those with mMRC 2, 3 and 4. Although physically active subjects tended to walk a longer distance in the test, it was not statistically significant compared with the others (p = 007) (Table 3).