Table 1.
Characteristics of the subjects and outcome parameters of the best 6MWT.
| Total (n=617) | Male (n=296) | Female (n=321) | p-values* | |
|---|---|---|---|---|
| Age (years) | 52 (29-67) | 49 (27-68) | 53 (31-67) | 0.509 |
| Height (cm) | 164 (157-171) | 170 (166-176) | 158 (152-163) | <0.0001 |
| Weight (kg) | 68 (59-78) | 74 (66-81) | 62 (55-71) | <0.0001 |
| BMI (kg.m–2) | 25 (23-28) | 25 (23-28) | 25 (22-28) | 0.210 |
| 6MWD (m) | 586±106 | 614±102 | 560±103 | <0.0001 |
| HRbaseline (bpm) | 82 (73-91) | 80 (71-90) | 83 (75-92) | 0.036 |
| ∆ HR (bpm) | 41 (25-59) | 41 (25-60) | 41 (25-58) | 0.925 |
| %HRmax | 73 (64-83) | 73 (64-82) | 74 (65-84) | 0.321 |
| SpO2baseline (%) | 97 (96-98) | 97 (95-98) | 97 (96-98) | 0.957 |
| ∆ SpO2 (%) | 0 (–2 to –1) | 0 (–1 to 1) | 0 (–2 to –1) | 0.825 |
| Borg Fbaseline (pts) | 0 (0-0) | 0 (0-0) | 0 (0-0) | 0.053 |
| ∆ Borg F (pts) | 1.5 (0.5-2.5) | 1 (0.3-2.0) | 1.5 (0.5-3.0) | 0.020 |
Data are expressed as median (interquartile range 25%-75%) except for the 6MWD (mean and SD). BMI: body mass index; 6MWT: 6-minute walk test; HR: heart rate, %HRmax: % of the maximal predicted heart rate; SpO2: peripheral oxygen saturation; Borg F: perceived leg fatigue assessed by the Borg scale.
*
Comparisons between male and female using the Mann-Whitney test.