Table 3.

Agreement between CPET-VO_2peak and questionnaire-VO_2peak at T₀

Variable	n	ICC	95%-CI	SEE	Mean ratio bias	Ratio lower 95%-LoA	Ratio upper 95%-LoA
CPET-VO2peak	70	n/a	n/a	n/a	n/a	n/a	n/a
FitMáx-VO2peak	65	0.69	0.18‒0.86*	3.28	1.21	0.80	1.62
FitMáx-VO2peak without cycling	69	0.62	0.01‒0.84*	3.31	1.28	0.81	1.75
VSAQ- VO2peak	70	0.53	0.34‒0.68*	4.95	1.06	0.33	1.79
DASI-VO2peak	61	0.37	0.10‒0.59*	5.46	1.26	0.55	1.97

Number of subjects per questionnaire (n), ICC with corresponding 95%-CI, SEE and mean ratio bias with 95%-LoA are reported for the relation between CPET-VO_2peak and questionnaire-VO_2peak at T₀. * Statistically significant

Abbreviations: CPET, cardiopulmonary exercise test; DASI, duke activity status index; ICC, intraclass correlation; n, number of subjects; n/a, not applicable; SEE, standard error of the estimate; VO_2peak, peak oxygen uptake; VSAQ, veterans specific activity questionnaire; 95%-CI, 95% confidence interval; 95%-LoA, 95% limits of agreement