Table 3.

Spirometry and CPET parameters

Spirometry	CPET
	Respiratory	Cardiovascular	Metabolic
FVC	VEpeak	HRR%	RER
FVC%	TVinitial	O2 pulse%	VO2, peak
FEV1	TVpeak	DELTA O2 pulse	VO2%
FEV1%	TVpeak/TVinitial	VO2/Wslope	AT
FEV1/SVC%	RR	HR/VO2	AT%
TLC	BR%	PASinitial	W
TLC%	SAO2, initial	PASpeak	W%
DLCO	SAO2, peak	PADinitial
DLCO%	DeSaO2	PADpeak
VA%	PetCO2, initial
DLCO/VA%	PetCO2, AT
	PetCO2, peak
	VE/VCO2, intercept
	VE/VCO2, slope

Abbreviations: FVC: forced vital capacity, FVC%: FVC in % of reference values, FEV1: forced expiratory volume in 1 second; FEV1% forced expiratory volume in 1 second in % of reference values; FEV1/SVC%: ratio of FEV1 to slow vital capacity in % of reference values; TLC: total lung capacity; TLC%: TLC in % of reference values; DLCO: diffusing capacity of the lungs for carbon monoxide; DLCO%: DLCO in % of reference values; VA: alveolar volume in % of reference values; DLCO/VA%: ratio of DLCO to VA; VE_peak peak minute ventilation; TV_initial: initial tidal volume; TV_peak: peak tidal volume; TV_peak/TV_baseline: ratio of peak to baseline tidal volume; RR: respiratory exchange ratio, the ratio between carbon dioxide production and oxygen intake; BR%: breathing reserve, the difference between the maximal voluntary ventilation and the minute ventilation (VE) as a % of the maximal voluntary ventilation; SAO_{2, initial}: initial blood oxygen saturation; SaO_{2, peak}: peak blood oxygen saturation; DeSaO2: blood oxygen desaturation, difference between SaO2 peak of the exercise SaO2 at baseline; PetCO_{2, initial}: end tidal partial pressure of CO₂ at baseline; PetCO_{2, AT}: end tidal partial pressure of CO₂ at anaerobic threshold; PetCO_{2, peak}: end tidal partial pressure of CO2 at peak exercise; VE/VCO_{2, intercept}: intercept of the linear relationship between minute ventilation and carbon dioxide production; VE/VCO_{2, slope}: slope of the linear relationship between minute ventilation and carbon dioxide production; HRR%: heart rate reserve, the difference between maximum predicted heart rate and observed maximum heart rate, as a % of the maximum predicted heart rate; O₂ pulse % predicted: O₂ pulse % predicted: oxygen pulse in % of reference values; DELTA O₂ pulse: the difference between oxygen pulse at the peak of the exercise and oxygen pulse at baseline; VO₂/W_slope: the slope of the oxygen uptake to work rate linear relationship; HR/VO₂: slope of the heart rate to oxygen uptake linear relationship; PAS_initial: systolic blood pressure at baseline; PAS_peak: systolic blood pressure at peak exercise; PAD_initial: diastolic blood pressure at baseline; PAD_peak: diastolic blood pressure at peak exercise; RER: respiratory exchange ratio, the ratio between carbon dioxide production and oxygen intake; VO_{2, peak}: oxygen intake at peak exercise; VO₂%: oxygen intake at peak in % of reference values; AT: anaerobic threshold; AT % predicted: anaerobic threshold in % of reference values; W: work rate at peak; W % predicted: work rate at peak in% of reference values.