Development and Interpretable Machine Learning-Based Prediction of Cardiovascular Disease Risk in Chinese COPD Patients: An Analysis of the CHARLS Database.

We found that the CVD group had more females (55.4% vs 39.5%, p < 0.001), slightly older age (median age 64.0 vs 63.0 years, p = 0.024), and almost significant increase in the number of unmarried persons (21.0% vs 15.9%, p = 0.05), as displayed in Table 1 .

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