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Sökning: WFRF:(Zock Jan Paul) > (2015-2019) > (2015)

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1.
  • Chen, Chih-Mei, et al. (författare)
  • Is There a Threshold Concentration of Cat Allergen Exposure on Respiratory Symptoms in Adults?
  • 2015
  • Ingår i: PLOS ONE. - 1932-6203. ; 10:6
  • Tidskriftsartikel (refereegranskat)abstract
    • Background and Objective Cat allergen concentrations higher than 8 mu g/g in settled house dust, have been suggested to provoke exacerbation of allergic respiratory symptoms. However, whether the 8 mu g/g of indoor cat allergen concentration is indeed the minimal exposure required for triggering the asthma related respiratory symptoms or the development of sensitization has not yet been confirmed. We studied the associations between domestic cat allergen concentrations and allergic symptoms in the European Community Respiratory Health Survey II, with the aim of confirming this suggested threshold. Methods Cat allergen concentrations were measured in the mattress dust of 3003 participants from 22 study centres. Levels of specific immunoglobulin E to cat allergens were measured in serum samples using an immunoassay. Information on allergic symptoms, medication use, home environment and smoking was obtained from a face-to-face interview. Results Domestic cat allergen concentrations were not associated with allergic/asthmatic symptoms in the entire study population, nor in the subset sensitized to cat allergen. We also found no association among individuals exposed to concentrations higher than 8 mu g/g. However, exposure to medium cat allergen concentrations (0.24-0.63 mu g/g) was positively associated with reported asthmatic respiratory symptoms in subjects who have experienced allergic symptoms when near animals. Conclusions The proposed 8 mu g/g threshold of cat allergen concentrations for the exacerbation of allergic/respiratory symptoms was not confirmed in a general European adult population. Potential biases attributable to avoidance behaviours and an imprecise exposure assessment cannot be excluded.
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2.
  • Storaas, Torgeir, et al. (författare)
  • Incidence of rhinitis and asthma related to welding in Northern Europe
  • 2015
  • Ingår i: European Respiratory Journal. - : The European Respiratory Society. - 0903-1936 .- 1399-3003. ; 46:5, s. 1290-1297
  • Tidskriftsartikel (refereegranskat)abstract
    • Welding-related asthma is well recognised but less is known about rhinitis in relation to welding. The aim here, was to study associations between welding, rhinitis and asthma in a general population sample, and factors influencing selection into and out of a welding occupation.Adult-onset asthma and non-infectious rhinitis were investigated in the international multicentre population-based Respiratory Health in Northern Europe (RHINE) study, including 16 191 responders aged 26-54 years. Ever welding (n=2181), welding >25% of working time (n=747), and welding in stainless steel >6 months (n=173) were assessed by questionnaire. Subjects with rhinitis or asthma onset when aged <18 years were excluded. Incidence rates for asthma and rhinitis were calculated from year of disease onset, and start and end of welding job. Cox's proportional hazard models adjusting for age, sex, parental education and study centre, and Kaplan-Meier curves were used.Rhinitis incidence was higher among welders (hazard ratio (HR) 1.4, 95% CI 1.3-1.6), consistent in men and women, and across centres (pheterogeneity=0.4). In men, asthma incidence was higher among welders (HR 1.4, 95% CI 1.04-1.97). Quitting welding was indicated higher after adult-onset rhinitis (HR 1.1, 95% CI 1.0-1.3).Adult-onset rhinitis and asthma was higher among welders, consistent across population samples from Northern Europe. No pre-employment selection was found, whereas selection out of welding jobs was suggested.
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3.
  • Tischer, Christina, et al. (författare)
  • Predictors of microbial agents in dust and respiratory health in the Ecrhs
  • 2015
  • Ingår i: BMC Pulmonary Medicine. - 1471-2466 .- 1471-2466. ; 15
  • Tidskriftsartikel (refereegranskat)abstract
    • Background: Dampness and mould exposure have been repeatedly associated with respiratory health. However, less is known about the specific agents provoking or arresting health effects in adult populations. We aimed to assess predictors of microbial agents in mattress dust throughout Europe and to investigate associations between microbial exposures, home characteristics and respiratory health. Methods: Seven different fungal and bacterial parameters were assessed in mattress dust from 956 adult ECRHS II participants in addition to interview based home characteristics. Associations between microbial parameters and the asthma score and lung function were examined using mixed negative binomial regression and linear mixed models, respectively. Results: Indoor dampness and pet keeping were significant predictors for higher microbial agent concentrations in mattress dust. Current mould and condensation in the bedroom were significantly associated with lung function decline and current mould at home was positively associated with the asthma score. Higher concentrations of muramic acid were associated with higher mean ratios of the asthma score (aMR 1.37, 95% CI 1.17-1.61). There was no evidence for any association between fungal and bacterial components and lung function. Conclusion: Indoor dampness was associated with microbial levels in mattress dust which in turn was positively associated with asthma symptoms.
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