Table 3.

Relative risks associated with abnormal peak VO₂ and age-predicted peak O₂ pulse and their combination

Variable	Description	Cardiac Mortality HR (95% CI)	P value	Major Events HR (95% CI)	P value
Peak VO2 ≥ 14.2 and Predicted Peak O2 pulse ≥ 85 %	All normal	1 (reference)	-	1 (reference)	-
Peak VO2 < 14.2 or Predicted Peak O2 pulse < 85 %	1 of 2 abnormal	2.31 (1.26 – 4.23)	0.006	2.91 (1.74 – 4.85)	<0.001
Peak VO2 < 14.2 and Predicted Peak O2 pulse < 85 %	Both abnormal	4.76 (2.68 – 8.46)	<0.001	6.74 (4.1 – 11.1)	<0.001

Peak VO₂ is expressed in mL․kg⁻¹․min⁻¹