本研究的目的在探討重症病人之睡眠品質、影響睡眠品質之相關因素及其預測因子。研究對象是某醫學中心內外科加護病房之70位重症成人病人共269個夜晚。研究方法是在10pm-6am之間，以護理活動及睡眠狀況查核表、燈光使用登記表、測量分貝計及史丹福嗜睡量表(Stanford Sleepiness Scale, SSS)了解病人睡眠品質及影響因素。研究結果顯示病人平均年齡為67.0±15.6歲。每個夜晚平均護理活動次數為20.2±4.5次，頻率最高在1am-2am的時段。護理人員觀察病人睡眠時數平均為3.0±1.8小時，由史丹福嗜睡量表所得到病人之嗜睡等級平均為3~4級。影響病人睡眠之重要因素有護理活動次數、噪音、年齡、停留ICU天數及燈光。當停留加護病房天數超過4天以上時，預測睡眠時數的重要因子為護理活動、噪音小於45dB之時數、年齡、停留ICU天數及未開燈時數。本研究之結果可提供臨床護理人員改善重症病人睡眠品質之依據及未來相關研究之參考。

The purpose of this study was to explore the sleep quality and inference in the critical ill patient. A convenient sample of 70 patients's 269 nights should their sleep assessed by observation from10p.m. to 6a.m. in the Intensive Care Unit. Daytime sleepiness was assessed by the Stanford Sleepiness Scale (SSS). The results of this study included: the average age was 67.0 (SD15.6), the mean number of care interactions per night was 20.2 (SD4.5), interactions were most frequent at 1a.m. and the average of SSS was 3 to 4. The most factors that affected sleep were care interactions, noise, age, days of stay in ICU and light. When the stay in ICU was over 4 days, the predicted factors affecting sleep were care interactions, hours of noise under 45dB, age, days of stay in ICU and hours of light. Research results are useful in developing intervention strategies to improve the sleep of patients in the intensive care unit.