. Author manuscript; available in PMC: 2020 Jun 16.

Published in final edited form as: JACC Heart Fail. 2013 Sep 11;1(5):427–432. doi: 10.1016/j.jchf.2013.05.008

Table 4.

Overall and RER Subgroup ROC Curve Analysis

Parameter/Statistic	Overall (n = 1,728)	RER <1.00 (n = 319)	RER 1.00–1.04 (n = 218)	RER 1.05–1.09 (n = 256)	RER ≥1.10 (n = 935)
VE/Vco₂ slope
Area under ROC curve (95% CI)	0.74 (0.71–0.77)	0.69 (0.61–0.77)	0.71 (0.63–0.80)	0.74 (0.66–0.82)	0.75 (0.71–0.80)
p Value	<0.001	<0.001	<0.001	<0.001	<0.001
Cutoff value (</≥)	35.4	35.6	35.7	34.9	35.7
Sensitivity/specificity (%)	67/67	64/62	67/67	68/67	69/69
Peak Vo₂
Area under ROC curve (ml·kg⁻¹·min⁻¹) (95% CI)	0.73 (0.70–0.76)	0.68 (0.60–0.76)	0.71 (0.61–0.81)	0.73 (0.66–0.81)	0.75 (0.71–0.79)
p Value	<0.001	<0.001	<0.001	<0.001	<0.001
Cutoff value (≤/>)	13.8	13.4	13.8	13.7	14.0
Sensitivity/specificity (%)	67/66	62/62	62/63	68/67	69/68

ROC = receiver-operating characteristic; other abbreviations as in Tables 1 and 2.