acute kidney injury in MIMIC

we only included the data from the first ICU admission of each adult patients. And we excluded patients if who 1) stayed in ICU less than 24 hours, 2) missed key data (serum creatinine, urine output, neutrophil, lymphocyte or platelet) and 3) without AKI. The identification of AKI was based on the Kidney Disease: Improving Global Outcomes (KDIGO) guideline: urine output less than 0.5 ml/kg/hour for 6 hours, or serum creatinine (SCr) increases ≥0.3 mg/dl within 48 hours or increases ≥1.5 times baseline value within 7 days.
Demographic information included age, sex, ethnicity, care unit and body mass index (BMI). Laboratory measurements included leukocyte, neutrophil, lymphocyte, erythrocyte, hemoglobin (Hb), red cell distribution width (RDW), platelet, blood glucose, SCr, blood urea nitrogen (BUN), serum sodium, serum potassium, serum chloride, serum pH, bicarbonate, partial pressure of oxygen (PO2) and partial pressure of carbon dioxide (PCO2) over the first 24 hours into the ICU. And Sequential Organ Failure Assessment (SOFA) score, Simplified Acute Physiology Score II (SAPSII) and comorbidity were also extracted over the first 24 hours.

本数据集仅包含每位成年患者在重症监护病房（ICU）首次入院期间的数据。对于以下情况的患者，我们将其排除在外：1) 在ICU的停留时间少于24小时；2) 缺失关键数据（血清肌酐、尿量、中性粒细胞、淋巴细胞或血小板）；3) 无急性肾损伤（AKI）。AKI的诊断依据为《肾脏疾病：改善全球预后》（KDIGO）指南：尿量连续6小时低于0.5毫升/千克/小时，或血清肌酐（SCr）在48小时内增加≥0.3毫克/分升，或7天内增加≥1.5倍基线值。人口统计学信息包括年龄、性别、种族、护理单位和体重指数（BMI）。实验室测量指标包括白细胞、中性粒细胞、淋巴细胞、红细胞、血红蛋白（Hb）、红细胞分布宽度（RDW）、血小板、血糖、血清肌酐（SCr）、血尿素氮（BUN）、血清钠、血清钾、血清氯、血清pH值、碳酸氢盐、氧分压（PO2）和二氧化碳分压（PCO2），这些指标均在患者进入ICU后的前24小时内进行测量。此外，还在前24小时内提取了序贯器官功能衰竭评估（SOFA）评分、简化急性生理评分II（SAPSII）和合并症。