哮喘儿童症状预测因素与病情严重恶化预测因素不一致
2011/07/06
摘要
背景:哮喘治疗与否及其治疗方法的选择,一般基于患者或其家长对症状的主诉。尚未有纵向研究对儿童哮喘症状与哮喘病情严重恶化之间的关系进行评价。本研究的目的旨在(1)评价哮喘症状与哮喘病情严重恶化之间的关系;(2)比较哮喘持续症状的预测因素和哮喘病情严重恶化的预测因素。
方法:儿童哮喘管理项目(CAMP)是一项多中心临床试验,有1041名儿童参与,随机分组后分别采用布地奈德、奈多罗米和安慰剂(需要时采用β激动剂)治疗。受试者每日填写日志卡,并进行事后分析,以此将患者分为持续性哮喘患者和间歇性哮喘患者。严重哮喘恶化指由哮喘导致的至少需要3天或以上口服激素、住院或急诊就诊,症状基于随访时的受试者主诉,每4个月随访一次。
结果:纵向检测结果显示,哮喘持续症状与哮喘病情严重恶化显著相关。与间歇性哮喘症状相比,哮喘持续症状的预测因素包括:未使用皮质激素治疗、FEV(1)/FVC比值较低、lnPC(20)较低。1次或以上哮喘病情严重恶化的预测因素包括:年纪较轻、前一年有住院史或急诊就诊史、过去3个月内有3天或以上的口服皮质激素、FEV(1)/FVC比值较低、lnPC(20)较低、log10嗜酸性细胞计数较高;皮质激素吸入治疗是无哮喘病情严重恶化的预测因素。
结论:哮喘持续症状患者更易出现哮喘病情严重恶化。然而,哮喘持续症状的人口统计学和实验室预测因素与哮喘病情严重恶化的预测因素并不一致。虽然症状和哮喘恶化显著相关,但这些预测因素却不尽相同。当前美国国家哮喘指南的焦点集中在哮喘控制、症状和风险的2个独立领域,这也在我们试验中得到了证实。
(陈欣 审校)
Chest. 2011 Feb 3. [Epub ahead of print]
Predictors of Symptoms are Different from Predictors of Severe Exacerbations from Asthma in Children.
Wu AC, Tantisira K, Li L, Schuemann B, Weiss ST, Fuhlbrigge AL; for the Childhood Asthma Management Program Research Group.
1Center for Child Health Care Studies, Department of Population Medicine, Harvard Pilgrim Health Care Institute and Harvard Medical School, Boston, MA.
Abstract
BACKGROUND: Asthma therapy is typically prescribed and titrated based on patient or parent self-report of symptoms. No longitudinal studies have assessed the relationship between symptoms and severe asthma exacerbations in children. The goal of our study was to (1) to assess the association of asthma symptoms with severe asthma exacerbations and (2) to compare predictors of persistent asthma symptoms and predictors of severe asthma exacerbations.
METHODS: The Childhood Asthma Management Program (CAMP) was a multi-center clinical trial of 1041 children randomized to receiving budesonide, nedocromil, or placebo (as-needed beta-agonist). We conducted a post-hoc analysis of diary cards that were completed by subjects on a daily basis to categorize subjects as having persistent versus intermittent symptoms. We defined a severe asthma exacerbation as an episode requiring three or more days of oral corticosteroids, hospitalization, or emergency department visit due to asthma based on self-report at study visits every four months.
RESULTS: While accounting for longitudinal measures, having persistent symptoms from asthma was significantly associated with having severe asthma exacerbations. Predictors of having persistent symptoms compared to intermittent symptoms included not being treated with inhaled corticosteroids, lower FEV(1)/FVC ratio, and a lower lnPC(20). Predictors of having one or more severe asthma exacerbations included younger age, history of hospitalization or emergency department visit in the prior year, three days or more of oral corticosteroids in the prior three months, lower FEV(1)/FVC ratio, lower lnPC(20,) and higher log10Eosinophil count; being treated with inhaled corticosteroids was predictive of having no severe asthma exacerbations.
CONCLUSIONS: Patients with persistent symptoms from asthma were more likely to experience severe asthma exacerbations. Nevertheless, demographic and laboratory predictors of having persistent symptoms are different from predictors of severe asthma exacerbations. Although symptoms and exacerbations are closely related, their predictors are different. The current national asthma guideline’s focus on the two separate domains of asthma control, impairment and risk, are supported by our analysis.
Chest. 2011 Feb 3. [Epub ahead of print]