本研究目地旨在探討影響慢性阻塞性肺疾病（COPD）患者憂鬱之相關因素。研究係採探索性、相關性設計。230位臺北市四家主要醫院符合條件的胸腔科門診COPD患者參與研究。問卷調查表包括個人及疾病相關基本資料、直立式呼吸困難表、自我效能量表、功能狀態量表、和貝氏憂鬱量表。研究結果顯示自覺疾病嚴重程度（15.6%）、一年內住院次數（5.9%）和心理層面（13.1%）與性功能層面（5.9%）的功能狀態對憂鬱的預測達顯著水準（p<.001），共解釋41.8%的變異量。而自覺呼吸困難和自我效能對憂鬱卻無預測力。本研究結果將提供發展臨床護理措施之依據，進而測試其成效。

The purpose of the study is to test relationships between self-efficacy, functional status, knowledge and depression in chronic obstructive pulmonary disease (COPD) patients. The conceptual model for the study is primarily derived from Bandura’s self-efficacy theory. The study uses an exploratory, correlational design. Data from 230 patients who visit the pulmonary clinics at four major hospitals in Taipei were collected. Measures included the COPD Self-Efficacy Scale, Pulmonary Functional Status Scale, Beck Depression Inventory, COPD Knowledge Scale, and selected demographic and COPD related variables. Data were analyzed with descriptive and multivariate statistical analyses. Results indicated that controlling for extraneous variables of frequency of hospitalization and perception of disease severity, functional status can still explained a significant amount of variance in depression. However, self-efficacy and knowledge have no significant predictive power in depression. The study findings can be used as basis for developing interventions and to be further testing.