Table 2.

Results of the ROC Analysis Comparing Prognostic Properties of GOLD Classifications and BODE Index

	AUC (95% CI)	P
GOLD (1–4)	0.614 (0.577–0.651)	<0.001
GOLD 2011 (A–D)	0.576 (0.543–0.609)	<0.001
GOLD 2017 (A–D)	0.557 (0.521–0.592)	0.006
GOLD 2023 (A–E)	0.557 (0.521–0.592)	0.006
BODE index	0.715 (0.675–0.756)	<0.001

Note: Statistically significant changes are indicated in bold.

Abbreviations: AUC, area under the curve; BODE, acronym for Body mass index, Obstruction, Dyspnea and Exercise tolerance; GOLD, the Global Initiative for Chronic Obstructive Lung Disease; 95% CI, 95% confidence interval.