ESH 2014:老年人群中血压与死亡风险的关系及生物学年龄在其中的关键作用

2014-06-16 国际循环 国际循环

目前,在老年人群中高血压对死亡率的预测价值尚存争议。有数据表明,在某些特定的老年亚组人群中,两者的关系会倒置。ESH大会上,荷兰列登大学医学中心M. Muller发表一项研究,评估患者的实际年龄以及反映生物学年龄的身体及认知功能是否会影响血压与死亡率的相关性。 研究入选LASA研究中的1466例年龄≥65岁的受试者(平均年龄为76岁),采用多因素校正Cox比例风险模型评估血压与全因死亡率的相关性

目前,在老年人群中高血压对死亡率的预测价值尚存争议。有数据表明,在某些特定的老年亚组人群中,两者的关系会倒置。ESH大会上,荷兰列登大学医学中心M. Muller发表一项研究,评估患者的实际年龄以及反映生物学年龄的身体及认知功能是否会影响血压与死亡率的相关性。

研究入选LASA研究中的1466例年龄≥65岁的受试者(平均年龄为76岁),采用多因素校正Cox比例风险模型评估血压与全因死亡率的相关性;并根据实际年龄、身体功能(根据步速进行分层)及认知功能(根据简易智力状态检查评分分层)对患者进行分层分析。

中位随访10.6年后,共计有1008例受试者死亡。收缩压(SBP)与死亡风险之间并无相关性。但是,舒张压(DBP)较低可增加全因死亡发生风险:与DBP正常(71~90 mm Hg)者相比,DBP较低(≤70 mm Hg)者发生全因死亡的HR为1.4(95%CI:1.2~1.6),尤以在年龄大于80岁的老老年人群以及身体及认知功能较差的人群中相关性最强,HR分别为1.6(95%CI:1.3~2.0)和1.5(95%CI:1.2~1.8),且上述结果不受随访时间的影响。此外,随着随访时间的延长,DPB增高也会增加死亡风险,但是仅见于基线身体及认知功能正常的人群中;与DBP正常者相比,DBP增高(>90 mm Hg)者发生全因死亡的HR为1.3(95%CI:1.0~1.7)。

该研究提示,在以人群为基础的大型老年队列中,DBP较低可增加全因死亡风险,尤其是在生物学意义上的老年人群中;而在相对年轻和有活力的人群中,DBP增高可增加死亡风险。上述结果提示,我们应该根据生物学年龄而非实际年龄对人群进行分层分析评估死亡风险,有助于对老年高血压患者实施以患者而非疾病为中心的个体化降压治疗。


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    2014-06-18 wfang549
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    2014-06-17 123.138.54.53

    一般人不易读懂

    0

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