Table 3.

Multiple regression analyses for the curve parameters describing the relationship between $\dot{\text{V}}$_E and $\dot{\text{V}}$CO₂, $\dot{\text{V}}$_E = a + b·$\dot{\text{V}}$CO₂

	Bivariate		Multivariate
	B	p	B	Adjusted B	95% CI	p
Curve Parameter a
Case/Control	0.13	0.802	0.37	0.11	−0.22, 0.97	0.213
Sex	0.44	0.130	0.30	0.09	−0.33, 0.94	0.348
FEV1	0.12	0.387	−1.17	−0.73	−1.89, −0.45	0.002
Height	0.02	0.026	0.05	0.51	−0.003, 0.11	0.063
Body mass	0.02	0.039	0.001	0.01	−0.03, 0.03	0.941
Cohort	−0.87	0.003	−1.42	−0.40	−2.68, −0.16	0.028
Curve Parameter b
Case/Control	−1.39	0.043	−1.12	−0.14	−2.13, −0.12	0.029
Sex	1.49	0.029	0.15	0.02	−0.93, 1.23	0.782
FEV1	−2.42	0.000	1.06	0.28	−0.17, 2.29	0.090
Height	−0.18	0.000	−0.13	−0.51	−0.23, −0.03	0.011
Body mass	−0.15	0.000	−0.03	−0.14	−0.09, 0.02	0.268
Cohort	5.85	0.000	3.04	0.37	0.90, 5.18	0.006

FEV₁ forced expired volume in 1 s, $\dot{\text{V}}$CO₂ carbon dioxide output.