Indoor allergens, asthma, and asthma-related symptoms among adolescents in Wuhan, China

Salo, Päivi M.; Xia, Jing; Johnson, C. Anderson; Li, Yan; Avol, Edward L.; Gong, Jicheng; London, Stephanie J.

doi:10.1016/j.annepidem.2003.09.015

Cited by 47 publications

(43 citation statements)

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“…The prevalence of allergies in Shanghai children is comparable to that in western countries [33] and is generally higher than for other Chinese cities [8,19,25,26]. This survey indicated that the prevalence of asthma in 4-6 years old children has risen to 10.3%, much higher than the 5.92% reported for Shanghai 6-14 year old children in 2007 [34].…”

Section: Discussionmentioning

confidence: 56%

“…Although pet-keeping might increase sensitization, it could alleviate the degree of the symptoms-development [1] and prevent children from getting hay fever [6]. Some studies have shown that there were no significant associations between pet-keeping and allergies in childhood [7][8][9] or a "protective" effect on early pet-keeping [4,[10][11][12][13][14][15][16]. But some other studies revealed that the "protective" effect might be confounded by parental avoidance behavior or selection of particular pet species [10,16,17].…”

mentioning

confidence: 99%

“…There have been few in China [8,19,[25][26][27][28]. The purpose of this paper is to quantify pet-keeping in Shanghai, study the associations between pet-keeping, pet avoidance behavior and asthma and allergies among preschool children, and to analyze the effect of "pet avoidance behavior" on these associations.…”

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confidence: 99%

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Pet-keeping and its impact on asthma and allergies among preschool children in Shanghai, China

Huang

Zou

et al. 2013

Chin. Sci. Bull.

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Whether early pet-keeping is a risk factor for children's asthma and allergies remains controversial. To investigate associations between asthma, allergies and airway symptoms among children and the indoor environment, a cross-sectional study was conducted in 5 districts of Shanghai. A number of 13335 questionnaires (response rate: 85.3%) of 4-6 year old children were analyzed. Families in urban areas have more pets except for dogs than families in suburbs. Fish are the most common pets in urban districts. The prevalence of doctor-diagnosed asthma was 10.3%, wheeze (ever) 28.3%, rhinitis (ever) 54.1%, doctor-diagnosed hay fever 12.6% and eczema (ever) 22.9%. In logistic regression analyses, early furred pet-keeping was positively associated with most of the symptoms and significantly with rhinitis (ever, adjusted OR=1.41, 95% CI=1.14-1.76) and doctor-diagnosed hay fever (1.38, 1.02-1.88). Current furred pet-keeping was significantly negatively associated with doctor-diagnosed asthma (0.57, 0.39-0.83). Persistent furred pet-keeping was significantly positively associated with rhinitis on pet or pollen exposure. However, current pet-keeping is not randomly distributed in the population. Children in families with "allergy" or with "pet avoidance behavior" (due to allergies in the family) have more symptoms, but have avoided cats and dogs, leading to the conclusion that such animals are "protective", namely the "Healthy Pet-Keeping" effect. Moreover, rodents and birds are risks for children's health. Fish-keeping is also seemingly a risk. This study indicates that early pet-keeping is a risk factor for asthma and allergies in families with a history of allergies, and part of residents in Shanghai have pet-avoidance behavior.pet, asthma, allergies, children, avoidance behavior

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Section: Discussionmentioning

confidence: 56%

mentioning

confidence: 99%

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Pet-keeping and its impact on asthma and allergies among preschool children in Shanghai, China

Huang

Zou

et al. 2013

Chin. Sci. Bull.

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“…La relación entre exposición a animales domésticos y el desarrollo de enfermedades respiratorias alérgicas en la niñez es controvertida. Aunque algunos estudios han mostrado que la exposición a estos alérgenos se asocia con prevalencia de asma y exacerbaciones de la enfermedad 26,27 , otros estudios sugieren que la exposición temprana a estos animales puede reducir el riesgo de desarrollar síntomas alérgicos, asma y sibilancias 28,29,30,31,32 . En este sentido se ha propuesto la teoría de que altas exposiciones a productos microbianos, como endotoxinas bacterianas, a edades tempranas puede mediar inmunológica-mente este efecto protector, especialmente en áreas metropolitanas 33,34,35 .…”

Section: Discussionunclassified

Incidencia de síntomas respiratorios y su asociación con contaminación atmosférica en preescolares: un análisis multinivel

et al. 2010

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“…En este tema, diversos estudios han demostrado la asociación de contaminantes domiciliares, como hongos, ácaros, cucarachas, combustibles de biomasa y humo de cigarrillo, entre otros, con la presencia de morbilidad respiratoria, especialmente en niños, que permanecen la mayor parte del tiempo en sus casas (25)(26)(27)(28)(29)(30)(31)(32).…”

Section: Discussionunclassified

Prevalencia de síntomas respiratorios indicativos de asma y asociación con contaminación atmosférica en preescolares de Bucaramanga, Colombia

et al. 2010

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Introducción. Actualmente se sabe que el incremento de los niveles de contaminación atmosférica externa e interna se asocia con efectos nocivos para la salud, especialmente asma y otras alergias. Objetivos. Determinar la prevalencia de síntomas respiratorios indicativos de asma en la población preescolar y compararla entre zonas con diferentes niveles de contaminación atmosférica en Bucaramanga, Colombia. Materiales y métodos. Estudio observacional analítico de corte transversal que compara los síntomas respiratorios en menores de siete años de dos zonas de la ciudad con niveles diferentes de contaminación por material sólido en partículas y ozono. La morbilidad fue medida con un cuestionario sobre síntomas respiratorios indicativos de asma, validado al español.Resultados. Se estudiaron 768 niños distribuidos de las zonas de alta y baja contaminación. El uso de cigarrillos (27,5%) y aerosoles (22,7%) se encontraron como las fuentes de contaminación más frecuentes dentro de las viviendas. La prevalencia de ruidos respiratorios a lo largo de la vida fue de 25,6% (IC95% 23,2-29,8) y la de diagnóstico médico de asma fue de 8,4% (IC95% 6,2-11,5), sin diferencias significativas entre las zonas. El modelo final no mostró asociación entre la contaminación atmosférica y la presencia de síntomas respiratorios indicativos de asma. Por el contrario, la presencia de pisos de cemento y moho mostró una asociación significativa con estos síntomas. Conclusiones. Es posible que en Bucaramanga los factores de contaminación domiciliaria puedan tener un mayor efecto sobre la presencia de síntomas respiratorios indicativos de asma en menores de siete años que los contaminantes externos.Palabras clave: signos y síntomas respiratorios, asma/epidemiología, contaminación del aire, preescolar. Respiratory symptoms associated with asthma prevalence and air pollution in preschool childrenIntroduction. Increases in the air pollution levels has well-documented harmful effects on human health, especially exacerbating problems of asthma and other allergies. Objective. The prevalence of symptoms associated with asthma was determined in preschool populations in zones with differing levels of air pollution. Materials and methods. A cross-sectional study was conducted in Bucaramanga, Colombia, comparing respiratory symptoms in 768 children under seven years in two urban zones with different pollution levels of particulate matter and ozone. Morbidity was evaluated for respiratory indicators of asthma by means of a questionnaire version previously validated in Spanish. Results. The use of cigarettes (27.5%) and aerosols (22.7%) were the most frequent source of indoor air pollution. Wheezing prevalence was 25.6% (95% CI 23.2-29.8%) and diagnosis of asthma was 8.4% (95% CI 6.2-11.5%), with no differences between zones. The final multivariate model did not show an association between outdoor pollution and symptoms related with asthma. However, concrete flooring and presence of mold did show an association with these symptoms. Conclusions. Indoor air qua...

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Indoor allergens, asthma, and asthma-related symptoms among adolescents in Wuhan, China

Abstract: Indoor allergen exposures were positively associated with asthma diagnosis and persistent respiratory symptoms among Chinese adolescents. Neither early-life nor current exposure to animals was protective for asthma or asthma-related symptoms.

Cited by 47 publications

References 59 publications

Pet-keeping and its impact on asthma and allergies among preschool children in Shanghai, China

Pet-keeping and its impact on asthma and allergies among preschool children in Shanghai, China

Incidencia de síntomas respiratorios y su asociación con contaminación atmosférica en preescolares: un análisis multinivel

Prevalencia de síntomas respiratorios indicativos de asma y asociación con contaminación atmosférica en preescolares de Bucaramanga, Colombia

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