睡眠是維持人體健康狀態的重要基礎，睡眠品質不佳已成為現代人的文明病，睡眠障礙不但直接降低整體生活品質，更間接透過與某些慢性疾病的關聯。除了飲食與運動的原因外，顯示肥胖與睡眠相關因子的關係是值得更進一步去探討。本研究目的在於探討影響臺灣地區民眾睡眠品質之相關因素，以做為臺灣民眾未來規劃作息型態與飲食計畫調整的參考。研究對象為2014年臺灣地區（不含離島）年滿18歲至69歲之成人，合格樣本之樣本數為551名。利用結構式問卷進行資料收集，訪問方式採電腦輔助調查電話訪問系統，資料收集時間為2014年8月至12月。研究結果顯示，睡眠品質平均總得分4.89分（SD=2.614），其中29.2%民眾自覺睡眠品質不佳。身體質量指數對睡眠品質指標量表總分及睡眠效率構面差異分析上達到統計顯著水準。進一步分析發現，慢性疾病在身體質量指數對於睡眠品質的影響關係上有顯著的中介影響效果，對於睡眠品質有負向影響。就整體分析而言，身體質量指數會影響民眾的慢性疾病，進而導致對睡眠品質好壞的變化。

Sleep is an important basis for maintaining health status. Poor sleep quality has become a disease of modern plague. Sleep disorders not only directly reduces the overall quality of life but also indirectly through association with chronic diseases. In addition to the reasons of eating and exercise, the relationship of obesity and sleep-related factors is worth to study further more. The purpose of this study was to explore the factors affecting sleep quality in Taiwan. In the future planning and sleep patterns and diet plan to adjust the reference in Taiwan. The eligible participants who must live in Taiwan and age ranged from 18 to 69 years old, a total of 551 samples were evaluated by the interviewing questionnaires. This study applied a structured questionnaire, and used a Computer Assisted Telephone Interview System (CATI) to conduct the interviews, and the test period was August to December 2014. The results show average total sleep quality score 4.89 points (SD=2.614), of which 29.2% of conscious poor sleep quality. Further analysis revealed the chronic diseases could mediate the effects of the body mass index and sleep quality, for the sleep quality has a negative impact. According to the results, body mass index will affect chronic disease, which led to sleep quality changes good or bad.