NEJM:儿童早期哮喘时五倍吸入型糖皮质激素能改善急性加重?

2018-04-09 吴星 环球医学

2018年3月,发表在《N Engl J Med》的一项由美国科学家进行的研究,考察了五倍吸入型糖皮质激素用于预防儿童哮喘急性加重的有效性。

2018年3月,发表在《N Engl J Med》的一项由美国科学家进行的研究,考察了五倍吸入型糖皮质激素用于预防儿童哮喘急性加重的有效性。

背景:尽管经常使用哮喘控制治疗(例如吸入型糖皮质激素),但哮喘急性加重仍然频繁发生。临床医生通常在出现早期哮喘失控症状时增加吸入型糖皮质激素剂量。但是,这种策略在儿童中的安全性和有效性数据仍是有限的。

方法:研究人员对254名儿童开展了研究,年龄为5~11岁,具有轻度至中度持续性哮喘,并且前一年内系统糖皮质激素治疗中出现至少1次哮喘急性加重。儿童接受48周持续低剂量吸入型糖皮质激素(氟替卡松丙酸酯每次吸入44 μg,每日吸2次)治疗,并在出现早期哮喘失控症状(“黄色区域”)时被随机分配至持续相同剂量(低剂量组)或五倍剂量(高剂量组;氟替卡松丙酸酯每次吸入220 μg,每日吸2次),共7日。以双盲模式提供治疗。主要结局是系统糖皮质激素治疗时严重哮喘急性加重发生率。

结果:两组间系统糖皮质激素治疗的严重哮喘急性加重发生率没有明显差异(高剂量组每年有0.48次急性加重,低剂量组每年有0.37次急性加重;相对比,1.3;95%置信区间,0.8-2.1;P=0.30)。两组间的第1次急性加重时间、治疗失败率、症状评分和黄色区域发作期间沙丁胺醇的使用没有明显差异。高剂量组的总糖皮质激素暴露比低剂量组高出16%。高剂量组和低剂量组之间线性增长的差值是每年-0.23 cm(P=0.06)。

结论:在每日吸入型糖皮质激素治疗的轻度至中度持续性哮喘儿童中,早期哮喘失控症状出现时五倍剂量不能降低严重哮喘急性发作发生率,或改善其他哮喘结局,并且可能与减弱的线性增长相关。(STICS ClinicalTrials.gov注册号,NCT02066129)

原始出处:

Daniel J. Jackson, Leonard B. Bacharier, David T. Mauger, et.al. Quintupling Inhaled Glucocorticoids to Prevent Childhood Asthma Exacerbations. NEJM March 8, 2018

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