Table 7. Univariate statistics for derivation cohort of AT CPET variables (n = 246).

Covariate	AT VO2 (L/min)		AT work (W)		AT 02 pulse (mL O2/beat)		AT VE/VCO2		AT VE/VO2
Age
At Fontan	r = 0.04	p = 0.58	r = 0.32	p = 0.61	r = 0.06	p = 0.35	r = -0.02	p = 0.74	r = -0.06	p = 0.36
At exercise	r = 0.17	p < 0.01	r = 0.46	p < 0.01	r = 0.41	p < 0.01	r = -0.27	p < 0.01	r = -0.21	p < 0.01
Height	r = 0.32	p < 0.01	r = 0.57	p < 0.01	r = 0.55	p < 0.01	r = -0.32	p < 0.01	r = -0.23	p < 0.01
Weight	r = 0.31	p < 0.01	r = 0.52	p < 0.01	r = 0.52	p < 0.01	r = -0.33	p < 0.01	r = -0.25	p < 0.01
Gender
Male	0.92 ± 0.61	p < 0.01	53.4 ± 25	p < 0.01	6.76 ± 3.8	p < 0.01	42.8 ± 10	p = 0.98	41.6 ± 10	p = 0.94
Female	0.70 ± 0.23		42.9 ± 21		5.51 ± 2.7		42.8 ± 9		41.5 ± 8
Rhythm at rest
Sinus	0.85 ± 0.57	p = 0.33	49.3 ± 24	p = 0.73	6.24 ± 3.0	p = 0.95	42.8 ± 9	p = 0.92	41.8 ± 10	p 0.54
Non-sinus	0.78 ± 0.32		48.2 ± 24		6.20 ± 4.1		42.8 ± 9		41.0 ± 8.9
Fenestration
Present	0.91 ± 1.3		36.6 ± 22		5.13 ± 1.7		47.3 ± 10		46.1 ± 11
Indeterminate	0.73 ± 0.2	p = 0.38	43.1 ± 21	p = 0.08	5.21 ± 4.0	p = 0.04	43.8 ± 7	p = 0.03	42.9 ± 10	p = 0.03
Not present	0.83 ± 0.34		51.3 ± 24		6.53 ± 3.4		42.1 ± 9		40.7 ± 9
Dominant ventricle
Left and mixed	0.80 ± 0.32	p = 0.35	50.3 ± 23	p = 0.18	6.47 ± 3.3	p = 0.11	42.2 ± 9	p = 0.13	40.6 ± 9	p = 0.04
Right	0.87 ± 0.74		46.0 ± 26		5.73 ± 3.7		44.1 ± 10		43.3 ± 11
Ventricular looping
d-loop	0.81 ± 0.53	p = 0.61	46.7 ± 22	p = 0.02	6.01 ± 3.5	p = 0.07	44.0 ± 9	p < 0.01	42.8 ± 10	p < 0.01
l-loop	0.85 ± 0.37		55.7 ± 28		6.97 ± 3.1		38.7 ± 6		37.2 ± 7