The Role of Cardiopulmonary Exercise Test in IPF Prognosis

Table 4

Relationships between the variables of 6MWT and VE/VCO₂ slope and VO₂ peak/kg by Spearman’s rank correlation coefficient. 𝑃 value < 0.05 is considered significant.

	VO2 peak/kg	VE/VCO2 slope
Distance	𝑟=0.7	𝑟=−0.6
	𝑃<0.0001	𝑃=0.001
Desaturation%	𝑟=−0.52	𝑟=0.4
	𝑃=0.007	𝑃=0.02

Minute ventilation (VE), carbon dioxide output (VCO₂), and peak oxygen consumption/kg (VO₂ peak/kg).