Nomograms for Predicting Coexisting Cardiovascular Disease and Prognosis in Chronic Obstructive Pulmonary Disease: A Study Based on NHANES Data

Figure 3

(a) Kaplan–Meier survival curves of CVD group in COPD. CVD = 0 means participants with COPD but without CVD, while CVD = 1 means participants with COPD coexisting with CVD. (b) Kaplan–Meier survival curves in high- and low-risk groups.

(a)

(b)