Table 4 Relationship between MTWA result and cardiopulmonary parameters or serum BNP concentration in the analyzed group

BNP (pg/ml)

45.1

41.9

64.4

42.2

57.1

0.247

0.052

Median

(6.6-598.4)

(23.3-150.8)

(25.1-343.5)

(6.6-598.4)

(23.3-343.5)

Min-max

PeakVO ₂ (ml/kg/min)

23.9 ± 6.7

23.1 ± 5.5

21.5 ± 6.9

24.9 ± 6.9

22.3 ± 6.2

0.317

0.072

Mean ± SD

%PeakVO ₂ (ml/kg/min)

62.3 ± 17.3

57.6 ± 9.6

57.2 ± 13.9

64.7 ± 17.0

57.4 ± 11.7

0.098

0.029

Mean ± SD

PeakVO ₂ (l/min)

1.6 ± 0.6

1.6 ± 0.5

1.4 ± 0.7

1.6 ± 0.6

1.5 ± 0.6

0.845

0.376

Mean ± SD

%PeakVO ₂ (l/min)

64.0 ± 18.8

57.4 ± 12.7

60.0 ± 18.2

66.4 ± 17.1

58.7 ± 15.4

0.046

0.034

Mean ± SD

HRmax

154.3 ± 24.0

153.4 ± 27.0

137.1 ± 22.9

160.1 ± 20.9

145.5 ± 26.1

0.280

0.016

Mean ± SD

%HRmax

85.9 ± 11.8

85.0 ± 10.8

77.6 ± 11.8

88.8 ± 11.0

81.4 ± 11.7

0.200

0.003

Mean ± SD

VE/VCO ₂ slope

32

32.5

42

32

36

0.118

0.061

Median

(22–60)

(26–60)

(26–59)

(22–58)

(26–60)

Min-max