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- Gunnbjornsdottir, M. I., et al.
(författare)
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Obesity and nocturnal gastro-oesophageal reflux are related to onset of asthma and respiratory symptoms
- 2004
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Ingår i: Eur Respir J. - : European Respiratory Society (ERS). ; 24:1
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Tidskriftsartikel (refereegranskat)abstract
- Several studies have identified obesity as a risk factor for asthma in both children and adults. An increased prevalence of asthma in subjects with gastro-oesophageal reflux (GOR) and obstructive sleep apnoea syndrome has also been reported. The aim of this investigation was to study obesity, nocturnal GOR and snoring as independent risk factors for onset of asthma and respiratory symptoms in a Nordic population. In a 5-10 yr follow-up study of the European Community Respiratory Health Survey in Iceland, Norway, Denmark, Sweden and Estonia, a postal questionnaire was sent to previous respondents. A total of 16,191 participants responded to the questionnaire. Reported onset of asthma, wheeze and night-time symptoms as well as nocturnal GOR and habitual snoring increased in prevalence along with the increase in body mass index (BMI). After adjusting for nocturnal GOR, habitual snoring and other confounders, obesity (BMI >30) remained significantly related to the onset of asthma, wheeze and night-time symptoms. Nocturnal GOR was independently related to the onset of asthma and in addition, both nocturnal GOR and habitual snoring were independently related to onset of wheeze and night-time symptoms. This study adds evidence to an independent relationship between obesity, nocturnal gastro-oesophageal reflux and habitual snoring and the onset of asthma and respiratory symptoms in adults.
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- Miller, AB, et al.
(författare)
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Fruits and vegetables and lung cancer: Findings from the European Prospective Investigation Into Cancer and Nutrition
- 2004
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Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136. ; 108:2, s. 269-276
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Tidskriftsartikel (refereegranskat)abstract
- Intake of fruits and vegetables is thought to protect against the development of lung cancer. However, some recent cohort and case-control studies have shown no protective effect. We have assessed the relation between fruit and vegetable intake and lung cancer incidence in the large prospective investigation on diet and cancer, the European Prospective Investigation Into Cancer and Nutrition (EPIC). We studied data from 478,021 individuals that took part in the EPIC study, who were recruited from 10 European countries and who completed a dietary questionnaire during 1992-1998. Follow-up was to December 1998 or 1999, but for some centres with active follow-up to June 2002. During follow-up, 1,074 participants were reported to have developed lung cancer, of whom 860 were eligible for our analysis. We used the Cox proportional hazard model to determine the effect of fruit and vegetable intake on the incidence of lung cancer. We paid particular attention to adjustment for smoking. Relative risk estimates were obtained using fruit and vegetable intake categorised by sex-specific, cohort-wide quintiles. After adjustment for age, smoking, height, weight and gender, there was a significant inverse association between fruit consumption and lung cancer risk: the hazard ratio for the highest quintile of consumption relative to the lowest being 0.60 (95% Confidence Interval 0.46-0.78), p for trend 0.0099. The association was strongest in the Northern Europe centres, and among current smokers at baseline, and was strengthened when the 293 lung cancers diagnosed in the first 2 years of follow-up were excluded from the analysis. There was no association between vegetable consumption or vegetable subtypes and lung cancer risk. The findings from this analysis can be regarded as re-enforcing recommendations with regard to enhanced fruit consumption for populations. However, the effect is likely to be small compared to smoking cessation.
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- Blanc, Paul D., et al.
(författare)
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The prevalence and predictors of respiratory-related work limitation and occupational disability in an international study
- 2003
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Ingår i: Chest. ; 124:3
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Work-related symptoms and disability due to respiratory disease are common and costly among working-age adults. To investigate this problem, we analyzed data on respiratory symptoms related to the workplace and occupational disability from the European Community Respiratory Health Survey (ECRHS). METHODS: The ECRHS is a population-based sample of adults aged 20 to 44, with oversampling of subjects with symptoms that are consistent with respiratory disease. We analyzed structured interviews from 17,567 subjects, of whom 15,039 were from a general random population sample and 2,528 were from the respiratory symptom oversample. We defined work-related respiratory symptoms as self-reported wheeze or chest tightness at work, and work-related respiratory disability as reported job change due to breathing difficulties at work. We used binary generalized linear modeling with a log link to estimate the risk of symptoms and disability. FINDINGS: Wheeze at work was reported in the general population sample by 1,552 subject (10%), ranging from 4 to 15% among the 16 countries analyzed. Work-related respiratory disability was reported by 540 subjects (4%), ranging from 1 to 8%. Reported workplace exposure to vapors, gases, dust, or fumes was associated with increased risk of respiratory symptoms at work (prevalence ratio [PR], 2.1; 95% CI 1.8-2.4) and work-related respiratory disability (PR, 3.4; 95% confidence interval [CI], 2.0 to 5.1). Workplace environmental tobacco smoke exposure was associated with symptoms (PR, 1.3; 95% CI, 1.2 to 1.5) but not with disability (PR, 1.1; 95% CI, 0.9 to 1.4). INTERPRETATION: These data indicated that work-related respiratory symptoms and disability vary widely in this international sample but, nonetheless, are associated with workplace exposures that could be addressed through preventive measures.
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- Hallén, Anders., et al.
(författare)
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Ion implantation of silicon carbide
- 2002
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Ingår i: Nuclear Instruments and Methods in Physics Research Section B. - 0168-583X .- 1872-9584. ; 186, s. 186-194
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Tidskriftsartikel (refereegranskat)abstract
- Ion implantation is an important technique for a successful implementation of commercial SiC devices. Much effort has also been devoted to optimising implantation and annealing parameters to improve the electrical device characteristics. However, there is a severe lack of understanding of the fundamental implantation process and the generation and annealing kinetics of point defects and defect complexes. Only very few of the most elementary intrinsic point defects have been unambiguously identified so far. To reach a deeper understanding of the basic mechanisms SiC samples have been implanted with a broad range of ions, energies, doses, etc., and the resulting defects and damage produced in the lattice have been studied with a multitude of characterisation techniques. In this contribution we will review some of the results generated recently and also try to indicate where more research is needed. In particular, deep level transient spectroscopy (DLTS) has been used to investigate point defects at very low doses and transmission electron microscopy (TEM) and Rutherford backscattering spectrometry (RBS) are used for studying the damage build-up at high doses.
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