Table 3.

Comparison between characterization data based on difference of 30 ms or more on the 6MWT₃₀.

	n	6MWT30-6MWT20 <30 meters	n	6MWT30-6MWT20 ≥ 30 meters	p
Age, years	18	68 ± 7	12	64 ± 8	0.27
Weight, kg	18	69.0 ± 14.1	12	76.9 ± 13.5	0.17
Heigth, m	18	1.66 ± 0.09	12	1.68 ± 0.10	0.47
BMI, kg/m2	18	25.0 ± 4.29	12	27.1 ± 4.20	0.72
FEV1/FVC, L	18	0.43 ± 0.11	12	0.45 ± 0.08	0.44
FEV1, L	18	1.31 ± 0.45	12	1.49 ± 0.33	0.24
FEV1, %pred	18	43.9 ± 11.8	12	48.2 ± 11.7	0.34
FVC, L	18	3.12 ± 0.90	12	3.33 ± 0.82	0.51
FVC, %pred	18	81.1 ± 14.7	12	82.6 ± 17.2	0.80
TLC, L	18	7.35 ± 2.44	11	7.93 ± 1.63	0.32
TLC, %pred	18	123 ± 29.7	11	126 ± 23.8	0.55
RV/TLC, %	18	52.4 ± 11.1	11	50.6 ± 7.29	0.64
RV/TLC, %pred	18	143 ± 29.0	11	147 ± 23.5	0.70
CAT, total	18	15 ± 7	12	13 ± 7	0.39
LCADL, %total	18	29.3 ± 9.58	12	31.5 ± 10.9	0.60
mMRC*	18	1.5[0–4]	12	1.5[0–4]	0.43
Δ HR, bpm	18	24.8 ± 7.64	12	39.5 ± 19.4	0.01
ΔSpO2	18	−5.61 ± 4.78	12	−7.08 ± 5.48	0.52
Δ dyspnea*	18	0[-1 – 3]	12	0[-1.5 – 1.5]	0.75
Δ fatigue*	18	0[-2 – 3]	12	0[0 – 0.5]	0.46
Δ SBP, mmHg	18	15.1 ± 34.1	12	35.0 ± 21.1	0.06
Δ DBP, mmHg	18	1.67 ± 7.07	12	2.50 ± 8.66	0.92
Distance, m	18	415 ± 63.7	12	530 ± 133	0.02
MI, m/s2	15	2.80 ± 0.68	11	4.42 ± 2.18	0.02
Steps number	15	634 ± 80.9	11	714 ± 115	0.04
EE, Kcal	15	32.3 ± 7.36	11	42.4 ± 14.3	0.04

Data presented as mean ± standard deviation; 6MWT₃₀: six minute walk test in track of 30 m; 6MWT₂₀: six minute walk test in track of 20 m; FEV₁: forced expiratory volume in the first second; FVC: forced vital capacity; RV: residual volume; TLC: total lung capacity; CAT: COPD Assessment Test; LCADL: London Chest Activity of Daily Living; mMRCm: modified Medical Research Council; Δ: delta; HR: heart rate; SpO₂: pulse oxygen saturation; SBP: systolic blood pressure; DBP: diastolic blood pressure; MI: movement intensity; EE: energy expenditure; *data presented as median[minimum – maximum].