目的：探討慢性阻塞性肺疾病病人接受肺復原訓練後之預後情形，包括再住院率、急診就醫率、死亡率、肺功能變化與呼吸困難程度。方法：採回溯性世代研究，以首次診斷為COPD之病人為研究對象，收集中部某醫學中心自2015年1月1日至2020年12月31日共6年之病歷資料，追蹤於初次診斷後COPD接受不同肺復原訓練週數，並比較其兩年內之預後表現。結果：肺復原訓練達 8 週以上之病人，於完成訓練後，其Borg Scale較接受未滿8週訓練者降低0.60分(p =.000)。其中分級D病人於兩組組間之Borg Scale亦呈現顯著差異(p =.023)。結論：分級A和B之病人接受未滿 8 週之肺復原訓練、分級C和D之病人接受8週以上之肺復原訓練，皆有助於改善肺功能與呼吸困難程度。

Purpose: This study aimed to investigate the prognosis of patients with chronic obstructive pulmonary disease (COPD) after receiving pulmonary rehabilitation (PR), including rehospitalization rates, emergency department visit rates, mortality, changes in lung function, and the severity of dyspnea. Method: A retrospective cohort study was conducted using patients newly diagnosed with COPD as the study population. Medical records were collected from a medical center in Central Taiwan covering a six-year period from January 1, 2015, to December 31, 2020. Patients were followed for two years after the initial diagnosis to compare prognostic outcomes associated with different durations of PR. Result: Patients who received PR for 8 weeks or longer demonstrated a greater reduction in Borg Scale scores after completing training compared with those who received PR for less than 8 weeks, with a mean difference of 0.60 points (p = .000). In addition, among patients classified as group D, a statistically significant difference in Borg Scale scores was observed between the two groups (p = .023). Conclusion: Patients classified as groups A and B who received PR for less than 8 weeks, and those classified as groups C and D who received PR for 8 weeks or longer, showed improvements in lung function and reductions in dyspnea severity.