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. 2022 Oct 1;17:2453–2459. doi: 10.2147/COPD.S378259

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© 2022 Chen et al.

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Kaplan-Meier survival curves for the time to the next severe exacerbation of chronic obstructive pulmonary disease in patients with high (≥6.5%), median (5.7%-6.4%), and low (≤5.7%) HbA1 levels.