摘要
背景:流行病学研究显示,幼年维生素D缺乏与后来哮喘的发生具有一定联系。
目的:本试验旨在检测哮喘患儿血清维生素D水平,比较哮喘患儿与无哮喘健康对照病例间的血清维生素D水平。
方法: 2009年10月~2010年7月间,在卡塔尔哈马德总医院儿童过敏症-免疫学门诊和初级医疗门诊入选483例哮喘患儿和483例健康对照病例。所有儿童年龄均小于16岁,哮喘由医生诊断。所有儿童的父母均完成全面的问卷调查,调查内容包括人口统计学数据、儿童饮食习惯和维生素D的摄入情况。同时,检测血清维生素D(25羟维生素D)、钙、磷、碱性磷酸酶、镁、肌酐和甲状旁腺素水平。血清维生素D水平低于20 ng/ml定义为维生素D缺乏。
结果:与无哮喘儿童相比,哮喘患儿的维生素D水平显著降低(P< 0.001)。68%的哮喘患儿存在维生素D缺乏。与健康对照相比,哮喘患者中的中度(41.8 vs. 25.1%)和重度维生素D缺乏者比例显著增加(P< 0.001)。维生素D缺乏 (35.6%, P= 0.005)和哮喘家族史(36.4%, P= 0.009)在哮喘患儿中更为常见。除了维生素D缺乏,哮喘患者还常常出现磷(P< 0.001)和镁(P= 0.001)水平下降,但血清碱性磷酸酶(P< 0.001)和IgE(P< 0.001)增加。大部分哮喘患儿日光暴露较少(66.7%, P= 0.006)、体力活动较少(71.3%, P< 0.001)。对于该人群的哮喘发病,维生素D缺乏的预测作用最强(OR 4.82; 95% CI 2.41-8.63, P< 0.001)。
结论:本研究显示,与健康对照儿童相比,大部分的哮喘患儿存在着维生素D缺乏。维生素D缺乏是卡塔尔小儿哮喘的主要预测因子。
(苏楠 审校)
Int Arch Allergy Immunol. 2011 Oct 6;157(2):168-175. [Epub ahead of print]
Vitamin D Deficiency as a Strong Predictor of Asthma in Children.
Bener A, Ehlayel MS, Tulic MK, Hamid Q.
Source
Department of Medical Statistics and Epidemiology, Hamad Medical Corporation, Department of Public Health, Weill Cornell Medical College, Doha, Qatar.
Abstract
BACKGROUND: Epidemiological studies suggest a link between vitamin D deficiency in early life and development of asthma in later life. Aim: The aim of this study was to measure serum vitamin D levels in asthmatic children and to compare these to healthy non-asthmatic controls.
METHODS: Asthmatic (n = 483) and healthy control (n = 483) children were recruited from the Pediatric Allergy-Immunology Clinics of Hamad General Hospital and the Primary Health Care Clinics in Qatar from October 2009 to July 2010. All children were below 16 years of age and asthma was diagnosed by a physician. Parents of all children completed extensive questionnaires documenting demographics, child’s feeding practice and vitamin D intake. Serum vitamin D (25-hydroxyvitamin D), calcium, phosphorus, alkaline phosphatase, magnesium, creatinine and parathyroid hormone assays were performed. Subjects with serum containing less than 20 ng/ml vitamin D were deemed deficient.
RESULTS: Asthmatic children had significantly reduced serum vitamin D levels compared to non-asthmatic children (p < 0.001); 68.1% of all asthmatics were vitamin D deficient. Asthmatic children had significantly higher degrees of moderate (41.8 vs. 25.1%) and severe (26.3 vs. 11.0%) vitamin D deficiency compared to healthy controls (p < 0.001). Positive familial history of vitamin D deficiency (35.6%, p = 0.005) and asthma (36.4%, p = 0.009) were significantly higher in asthmatic children. Along with vitamin D deficiency, asthmatics also had reduced phosphorus (p < 0.001) and magnesium (p = 0.001) levels but elevated serum alkaline phosphatase (p < 0.001) and IgE (p < 0.001). The majority of asthmatic children had less exposure to sunlight (66.7%, p = 0.006) and less physical activity (71.3%, p < 0.001). Vitamin D deficiency was the strongest predictor of asthma in this population (OR 4.82; 95% CI 2.41-8.63, p < 0.001).
CONCLUSION: The present study revealed that the majority of asthmatic children had vitamin D deficiency compared to control children. Vitamin D deficiency was the major predictor of asthma in Qatari children。
Int Arch Allergy Immunol. 2011 Oct 6;157(2):168-175. [Epub ahead of print]
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