目的：本研究的目的為瞭解重鬱症病患社會支持、互惠性、衝突與憂鬱程度之相關性，並找出憂鬱程度之重要預測因子。方法：本研究採立意取樣的方式，共有800位重鬱症病患參與研究，透過結構式問卷收集資料。結果：研究結果發現：重鬱症病患的社會支持、互惠性、衝突主要來源為配偶；重鬱症病患的社會支持、互惠性與憂鬱程度成負相關；而其衝突與憂鬱程度則成正相關。結論：本研究中重鬱症病患的社會支持、衝突為憂鬱程度預測因子，總解釋量為29.5%。臨床應用上建議先評估病患在社會支持以及人際互動上的衝突狀況，教導家屬在與病患溝通或相處上，應加強社會支持並減少衝突，可減輕憂鬱程度。

Objectives: The purposes of this study were twofold. First, this study was to investigate the relationships among social support, reciprocity, and conflict and the level of depression in patients with major depression. Secondly, to determine the extent to which social support, reciprocity, and conflict might influence the patients' level of depression. Methods: eighty major depression patients (mean gae 50) participated in the study. CES-D Chinese version and Interpersonal Relationship Inventouy were used to assess levels of depression, social support, reciprocity and conflict.Data were analyzed by t-test, one-way ANOVA, correlations and multiple regressions. Results: The patient's spouse was the most common primary surce of social support, reciprocity and the level of depression were negatively associated;the perceived conflict and the level of depression were positively correlated. Patient's social support and confict accounted for 29.5% of the variance of the patient's level of depression. Conflusions: The clinical implications of this study are the follows:social support and conflict should be the focus of assessment. Increasing social support and reducing conflict might improve the patient's level of depression.