本研究的目的在於探討第二型中老年糖尿病患人口學特性、疾病相關特性、自我照顧行為和社會支持與生活品質的關係，並預測病患生活品質及其影響因素。採用橫斷式調查研究法，以立意取樣收集南臺灣某醫學中心新陳代謝科門診，40歲以上之第二型糖尿病病患131名，採用自我照顧行為量表、社會支持量表與臺灣簡明版世界衛生組織生活品質量表進行資料收集。研究結果發現第二型糖尿病患的生活品質的預測因素為自我照顧行為、經濟狀況和住院次數，解釋總變異量為21％。本研究結果提供醫護人員認識第二型糖尿病患生活品質之相關因素，進而協助患者改善以及提昇其生活品質。

The purpose of this study was to explore the quality of life, and its predictors among middle-aged and elderly patients with Type 2 Diabetes Mellitus. 131 participants of age 40 or above were recruited from an outpatients department in one medical center in southern Taiwan. The study had a cross-sectional design; each participant was administered structured questionnaires, including the Diabetes Self-Care Behavior Scale, the Social Support Scale and the World Health Organization Quality of Life-BREF (WHOQOL-BREF). The results show that the predictors of patient's quality of life were diabetic self-care behaviors, economic status, and frequency of hospitalization, with a total variance of 21%. These findings can help health professionals to learn more about these patients. Furthermore, a suitable program and nursing interventions could be implemented to promote these patients' quality of life.