Study population and grouping

A total of 98 patients with COVID-19 treated at The People’s Hospital of Guang’an from September 2021 to January 2023 were retrospectively collected as the research subjects. Among them, 48 patients who received standard care from September 2021 to September 2022 were set as the control group, and 50 patients who underwent cardiopulmonary rehabilitation nursing from October 2022 to January 2023 were set as the research group. The control group included 26 males and 22 females, with an average age of 55.98±11.98 years, while the research group comprised 32 males and 18 females, with an average age of 56.32±12.56 years. The research protocol received ethical approval from the Ethics Committee of The People’s Hospital of Guang’an, and data were sourced from the hospital’s information system.