Table 5.

$\dot{\mathrm{V}}$O₂ at the Tvent and at the Symptom-Limited Peak of Incremental CPET Measured in the Canadian Cohort Obstructive Lung Disease Study Participants and Predicted Using the Equations of Jones et al¹⁰ (1985)

Variable	Measured	Jones et al10 (1985) Mean ± SD	Measured–Jones Mean (95% CI)	Equivalence Margin	TOST-P 90% CI
Men
$\dot{\mathrm{V}}$O2 at Tvent, L/min	1.11 ± 0.28	1.28 ± 0.20	−0.17 (−0.25 to −0.09)	± 0.19	−0.24 to −0.10
$\dot{\mathrm{V}}$O2 at peak, L/min	2.38 ± 0.51	2.37 ± 0.42	a	a	a
$\dot{\mathrm{V}}$O2 at Tvent, % peak	48 ± 10	54 ± 2	a	a	a
Women
$\dot{\mathrm{V}}$O2 at Tvent, L/min	0.80 ± 0.25	0.99 ± 0.16	−0.19 (−0.27 to −0.12)	± 0.17	−0.25 to −0.13
$\dot{\mathrm{V}}$O2 at peak, L/min	1.66 ± 0.40	1.20 ± 0.36	a	a	a
$\dot{\mathrm{V}}$O2 at Tvent, % peak	49 ± 12	87 ± 15	a	a	a

CPET = cardiopulmonary exercise testing; TOPT-P = two one-sided test of equivalence for paired samples; Tvent = ventilatory threshold; $\dot{\mathrm{V}}$O₂ = rate of oxygen consumption.

^aNo comparisons were made with peak data.