Blood pressure variability, baroreflex sensitivity indices, interbeat intervals and low frequency/high frequency interbeat interval ratio at the beginning and at the end of hemodialysis*.

*Data given as median and interquartile range;**Number of patients: all sessions-108; without hypertension-51; with hypertension-57. Beginning-the initial 20 minutes of the dialysis session; End-the last 20 minutes of the dialysis session. Comparison of sessions without and with hypotension-Beginning:ap = 0.004;bp = 0.008; End:cp = 0.001;dp = 0.035.

*数据以中位数（median）和四分位距（interquartile range）形式给出；患者总例数：所有透析疗程共计108例，其中无高血压（hypertension）者51例、伴高血压者57例。阶段定义：起始阶段为单疗程透析的初始20分钟，结束阶段为单疗程透析的最后20分钟。伴与不伴低血压（hypotension）的透析疗程对比结果：起始阶段ap=0.004、bp=0.008；结束阶段cp=0.001、dp=0.035。*