Brain Responses during the Anticipation of Dyspnea

Table 2

Group mean (SD) respiratory parameters for conditions of anticipation and perception of dyspnea.

	Anticipation of dyspnea		Perception of dyspnea
	Mild	Severe	Mild	Severe
(mmHg)	33.81 (3.46)	33.45 (3.4)	33.82 (3.4)	33.85 (3.6)
(breaths/min)	13.81 (3.66)	13.75 (3.4)	13.69 (3.63)	12.72 (3.7)^†
(mbar)	1.11 (0.31)	1.05 (0.3)	2.27 (0.89)	9 (3.97)^†
(s)	1.83 (0.61)	1.79 (0.41)	2.06 (0.56)	2.43 (0.67)^†
(L/min)	10.04 (2.34)	9.56 (2.56)	12.03 (2.93)	11.48 (2.94)
(L)	0.82 (0.35)	0.77 (0.3)	0.95 (0.31)	1 (0.39)

⁢ corrected < 0.05, corrected < 0.01 for anticipation of severe versus anticipation of mild and severe dyspnea versus mild dyspnea, respectively.
= end-tidal CO₂ pressure; = breathing frequency; = peak inspiratory mouth pressure; = inspiratory time; = minute ventilation; = tidal volume.