目的：本研究旨在探討在疾病治療過程中且未經歷復發階段的乳癌患者，其主要照顧者的因應、社會支持與生活品質之相關性。方法：採研究調查法，以結構性問卷於南部兩所醫學中心及一所區域教學醫院之外科門診與化療室收集資料，有效問卷共54 份。研究工具包括：家屬因應行為量表、社會支持量表及台灣簡明版世界衛生組織生活品質問卷。 結果：情緒取向因應與整體生活品質成顯著負相關；相反地，問題取向因應與之成顯著正相關。乳癌患者家屬照顧者主觀認為所獲得的社會支持程度，與其生活品質成正相關，特別是來自於其親友的部分。逐步迴歸分析發現，對家屬照顧者整體生活品質最具預測力之變項分別為：情緒取向因應、經濟狀況、親友以及患者的社會支持，可解釋其總變異量 44.8%。結論：研究結果顯示，當乳癌患者之主要照顧者情緒取向因應越少，問題取向的因應越多，且有來自親友的社會支持較高的時，其整體生活品質會較佳。

Objectives: The purpose of this study was to identify the factors that affect the adjustment of the primary caregivers of breast cancer patients, and to examine what coping strategies and sources of perceived social support are related to a higher quality of life. Methods: This cross-sectional study was designed to determine the relationship between predictor variables (coping strategies, social support) and quality of life. The sample consisted of 54 primary caregivers of women who had been diagnosed with breast cancer, stages 0-3, within an 18-month period. The independent variables were measured with the Family Coping Behaviors Scale and the Social Support Scale. The dependent variable was measured with the WHOQOL- BREF. Results: Bivariate correlational analysis showed that problem-focused coping strategies and social support from family/friends were both significant and positively related to quality of life, whereas emotion-focused coping strategies had detrimental effects. Study variables accounted for a considerable amount of variance in the primary caregivers' quality of life (44.8%). Among these factors, emotion-focused coping strategies and social support from family/friends accounted for the greatest variance in the level of the quality of life of the family caregivers. Conclusion: The findings suggest that coping strategies are very influential in helping primary caregivers deal with the effects of cancer, and the perceived adequacy of support from family members or friends is also important to their psychosocial adjustment.