Table 2 Measurements during incremental cardiopulmonary exercise testing (Mean ± SD).

From: Factors influencing self-selected walking speed in fibrotic interstitial lung disease

Variables

Patients (n = 10)

Controls (n = 10)

p

\({\dot{\text{V}}}\)O2 L min−1 (%pred)

0.83 ± 0.47 (32 ± 7)

1.94 ± 0.36 (74 ± 10)

0.001

\({\dot{\text{V}}}\)O2 mL kg−1 min−1

12.8 ± 6.90

28.8 ± 3.25

0.001

\({\dot{\text{V}}}\)CO2 L  min−1

0.89 ± 0.52

2.02 ± 0.56

0.001

RER

1.21 ± 0.21

1.10 ± 0.08

0.622

\(\dot{\text{V}}\)E L  min−1

34 ± 17

61 ± 18

0.006

\(\dot{\text{V}}\)E/MVV

0.69 ± 0.31

0.67 ± 0.19

0.836

f breaths min−1

48 ± 11

36 ± 5

0.003

VT

0.74 ± 0.40

1.71 ± 0.35

0.001

HR bpm

156 ± 9

158 ± 8

0.957

SpO2 final %

82 ± 11

95 ± 1

0.002

Delta SPO2%

− 15 ± 10

− 3 ± 1

0.006

Borg Dyspnea (range)

3–10

0–9

 

Borg Leg Effort (range)

0–9

0–10

 
  1. \({\dot{\text{V}}}\)O2: oxygen consumption; \({\dot{\text{V}}}\)CO2: carbon dioxide output; RER: Respiratory Exchange Ratio; \(\dot{\text{V}}\)E: minute ventilation; MVV: maximum voluntary ventilation; f: breathing frequency; VT: tidal volume; HR: heart rate; SpO2: oxyhemoglobin saturation by pulse oximetry.
Back to article page