data for Protective effect of intra-operative dexmedetomidine infusion combined with epidural blockade on postoperative analgesia and early cognitive dysfunction for elder patients after radical resection of colorectal cancer

Demographic data like age, gender, body mass index (BMI), and clinical data including ASA stage, pathological type and mean operative time were collected. The MMSE score, Ramsay score and Visual Analogue Score (VAS) were all measured at 4h or 2 h, 12 h, 24 h and 48 h after surgery. POCD was defined as the difference between preoperative and postoperative mean MMSE score decline > 2 points [18]. POCD incidence was recorded at 7 d postoperatively. The PCIA pressing time within 48 h, time for patients’ first out of bed activity, first anus exhaust time, hospital stay and complications within 3 months after surgery were also recorded. The follow-up lasted for 3 months.本数据集收集了年龄、性别、体重指数（body mass index, BMI）等人口统计学资料，以及美国麻醉医师协会分期（ASA stage）、病理类型、平均手术时长等临床数据。分别于术后2h或4h、12h、24h及48h，对简易精神状态检查表（MMSE）评分、拉姆齐评分（Ramsay score）及视觉模拟评分法（Visual Analogue Score, VAS）进行测定。术后认知功能障碍（postoperative cognitive dysfunction, POCD）被定义为术前与术后简易精神状态检查表平均评分下降幅度超过2分[18]，并记录术后7d的POCD发生率。同时记录术后48h内患者自控静脉镇痛（PCIA）按压时长、患者首次下床活动时间、首次肛门排气时间、住院时长，以及术后3个月内的并发症发生情况，本次随访周期为3个月。