BACKGROUND: Recurrent wheezing during infancy is a heterogeneous disorder that has been associated with early-onset asthma. OBJECTIVE: To identify phenotypes of severe recurrent wheezing and therapeutic approaches. METHODS: We performed cluster analysis with 20 variables of 551 children with active asthma, younger than 36 months old, and enrolled in the Trousseau Asthma Program. RESULTS: We identified 3 independent clusters of children with wheezing. Cluster 1, mild episodic viral wheeze (n= 327), consisted of children with wheezing related only to colds (71%), mild disease (76%), and mainly normal chest x-ray results. Cluster 2, nonatopic uncontrolled wheeze (n = 157), was characterized by moderate to severe disease (91%), uncontrolled wheezing despite high doses of inhaled corticosteroids (55%), parents with asthma, and increased levels of ferritine. Cluster 3, atopic multiple-trigger wheeze (n = 67), included more children with multiple-trigger wheeze (68%) than did clusters 1 or 2; eczema (75%); a positive result from the Phadiatop Infant test (90%); increased levels of IgE, IgA, and IgG; and abnormal results from chest x-rays. In separate analysis, 1 parameter for boys (increased total level of IgE) and 2 parameters for girls (wheezing severity and increased total level of IgE) properly classified 90% of boys and 83% of girls in the appropriate cluster. Significant associations were found between overcrowding, molds and cockroaches at home, and atopic multiple-trigger wheeze and between day-care attendance and nonatopic uncontrolled wheeze in other parts. CONCLUSION: We identified different phenotypes of recurrent wheezing in young children by using cluster analysis with usual variables. These phenotypes require confirmation in longer, follow-up studies.
BACKGROUND: Recurrent wheezing during infancy is a heterogeneous disorder that has been associated with early-onset asthma. OBJECTIVE: To identify phenotypes of severe recurrent wheezing and therapeutic approaches. METHODS: We performed cluster analysis with 20 variables of 551 children with active asthma, younger than 36 months old, and enrolled in the Trousseau Asthma Program. RESULTS: We identified 3 independent clusters of children with wheezing. Cluster 1, mild episodic viral wheeze (n= 327), consisted of children with wheezing related only to colds (71%), mild disease (76%), and mainly normal chest x-ray results. Cluster 2, nonatopic uncontrolled wheeze (n = 157), was characterized by moderate to severe disease (91%), uncontrolled wheezing despite high doses of inhaled corticosteroids (55%), parents with asthma, and increased levels of ferritine. Cluster 3, atopic multiple-trigger wheeze (n = 67), included more children with multiple-trigger wheeze (68%) than did clusters 1 or 2; eczema (75%); a positive result from the Phadiatop Infant test (90%); increased levels of IgE, IgA, and IgG; and abnormal results from chest x-rays. In separate analysis, 1 parameter for boys (increased total level of IgE) and 2 parameters for girls (wheezing severity and increased total level of IgE) properly classified 90% of boys and 83% of girls in the appropriate cluster. Significant associations were found between overcrowding, molds and cockroaches at home, and atopic multiple-trigger wheeze and between day-care attendance and nonatopic uncontrolled wheeze in other parts. CONCLUSION: We identified different phenotypes of recurrent wheezing in young children by using cluster analysis with usual variables. These phenotypes require confirmation in longer, follow-up studies.
Authors: Mohamed S Al-Moamary; Sami A Alhaider; Abdullah A Alangari; Mohammed O Al Ghobain; Mohammed O Zeitouni; Majdy M Idrees; Abdullah F Alanazi; Adel S Al-Harbi; Abdullah A Yousef; Hassan S Alorainy; Mohamed S Al-Hajjaj Journal: Ann Thorac Med Date: 2019 Jan-Mar Impact factor: 2.219
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Authors: Mohamed S Al-Moamary; Sami A Alhaider; Mohamed S Al-Hajjaj; Mohammed O Al-Ghobain; Majdy M Idrees; Mohammed O Zeitouni; Adel S Al-Harbi; Maha M Al Dabbagh; Hussain Al-Matar; Hassan S Alorainy Journal: Ann Thorac Med Date: 2012-10 Impact factor: 2.219