Little information is available on associations between rhinitis and chronic bronchitis/emphysema (CBE).Self-reported upper airway symptoms, asthma, and CBE were examined in 12,079 adults living in southern Sweden.The response rate was 70% (n=8,469), of whom 33% reported signi®cant nasal symptoms: a blocked nose was reported by 21%; sneezing by 18%; nasal discharge by 17%; and thick yellow nasal discharge by 5.7%. Nasal symptoms and combined nasal and self-reported bronchial disease were generally more common among smokers than nonsmokers. There was little overlap between asthma and CBE, but 46% of those with asthma and 40% of those with CBE had signi®cant nasal symptoms. Best predicting factors (odds ratios >3) for asthma and CBE were nasal symptoms due to exposure to animals and damp/cold air, respectively.One-third of an adult, southern Swedish population, had signi®cant allergic and/or nonallergic nasal symptoms. Nasal symptoms were frequently found to coexist with both asthma and chronic bronchitis/emphysema, suggesting that pan-airway engagement is common in both diseases. Differing associations between types of nasal symptoms and allergic and irritant triggers of nasal symptoms, with regard to asthma and chronic bronchitis/emphysema, emphasize the different natures of these bronchial diseases. Eur Respir J 2001; 17: 596±603.

Using a postal questionnaire the prevalence of hand eczema was determined in a general population of 11,798 individuals aged 20-77 years who were randomly drawn from the population records. The response rate was 78.1%. One-year prevalence of hand eczema among women varied between 1.9% and 10.8%, with the highest figure among those aged 30-39 years. The corresponding figures for men were 2.3% and 5.6%, with the highest figure among those aged 20-29 years. Lifetime prevalence varied between 5.7% and 16.7% among women and between 5.2% and 9.5% among men. Using multiple logistic regression analysis female sex (OR=1.91, 95% CI 1.47-2.47) and smoking (OR=1.35, 95% CI 1.04-1.75) were independent risk factors for reporting 1-year prevalence of hand eczema, whereas age (OR=0.99, 95% CI 0.97-0.99) was inversely related to the 1-year prevalence of hand eczema. Aggregated risk occupation or categorized occupation such as medical and nursing work, production or service were not significantly associated with 1-year prevalence of hand eczema.

Background: There is growing evidence that air pollution from traffic has adverse long-term effects on chronic respiratory disease in children, but there are few studies and more inconclusive results in adults. We examined associations between residential traffic and asthma and COPD in adults in southern Sweden. A postal questionnaire in 2000 (n = 9319, 18-77 years) provided disease status, and self-reported exposure to traffic. A Geographical Information System (GIS) was used to link geocoded residential addresses to a Swedish road database and an emission database for NOx.

The prevalence of obstructive lung diseases is increasing in Scandinavia and worldwide. The reasons for this are not known. The prevalence varies between countries but also between different areas within the same country. In northern Europe a north-south gradient and also an east-west gradient have been proposed. To our knowledge this is the first comprehensive epidemiological study concerning obstructive lung diseases and respiratory symptoms in the southern part of Sweden. The prevalence of bronchial asthma, chronic bronchitis/emphysema, respiratory symptoms, smoking habits and medication in a random sample of 12,071 adults aged 20-59 years was assessed in a postal survey with a slightly modified questionnaire previously used in central and northern Sweden (the OLIN Studies). The questionnaire was based on the British Medical Research Council (BMRC) questionnaire. We also compared the prevalence figures of asthma found in the postal survey with those reported in the medical records in a part of the study area. After two reminders, the response rate was 70.1% (n = 8469); 33.8% of the responders were smokers. Among younger (20-39 year age group) individuals, smoking was most common in women, whereas in those aged 40-59 years, smoking was more common in men. In all, 469 subjects (5.5%) stated that they had asthma, 41.6% of whom reported a family history of asthma compared to 15.9% of the study sample not reporting asthma. Of all subjects reporting asthma, 60.1% (n = 282) answered that they used asthma drugs. Inhaled steroids were used by 20.7%. Chronic bronchitis and/or emphysema was reported by 4.6% (n = 392), 28.6% of whom reported a family history of chronic bronchitis or emphysema compared to 6.8% of the study sample not reporting chronic bronchitis. The most common respiratory symptom in the study population was 'phlegm when coughing' reported by 15.1% (n = 1279). Our data show a prevalence of self-reported asthma of 5.5% compared with 7% reported by Lunbäck et al. in northern Sweden, which indicates a north-south gradient.

Background: Potential links between eczema and obstructive pulmonary diseases have been postulated. Previously we have reported the prevalence of upper and lower respiratory diseases and the relation to environmental and socio-economic factors in a randomly selected adult population in southern Sweden using a postal questionnaire.

Background: There is conflicting evidence that traffic-related air pollution is a risk factor for allergic conditions. Few studies have investigated this in adults. In adults, a high proportion of asthma, rhinitis and eczema is triggered by non-allergic factors. We investigated traffic as a risk factor for allergic versus non-allergic asthma and rhinitis, and eczema, in adults.

This study showed that AR became more common between 1992 and 2000, but also indicated remission in about 20% of the cases within the 8-year period, particularly in older ages. Asthma seems to be associated with higher risk for AR as well as less chance for remission, while heredity of asthma (or AR) may only be associated with the risk for the development and not remission of AR.

We wanted to test whether living environment, occupation and social position are risk factors for asthma and chronic bronchitis/emphysema (CBE). The prevalence of bronchial asthma, CBE, respiratory symptoms and smoking habits in a random sample of 12,071 adults aged 20-59 years was assessed in a postal survey with a slightly modified questionnaire previously used in central and northern Sweden (The OLIN studies). Occupation was coded according to a socio-economic classification system. Six different living environment areas were defined; city-countryside, seaside-not seaside and living close to heavy traffic-not living close to heavy traffic. Multiple logistic regression analysis (forward conditional) was applied to estimate the association between the proposed set of risk factors and self-reported obstructive lung diseases and lower respiratory symptoms controlling for age, gender and smoking. After two reminders, the response rate was 70.1% (n=8469); 33.8% of the responders were smokers. In all, 469 subjects (5.5%) stated that they had asthma and 4.6% reported CBE. Besides smoking, which was a risk for both asthma and CBE, there were different risk patterns for self-reported asthma and CBE. In the economically active population there was a tendency that CBE was more common among 'unskilled and semi-skilled workers'. This fact was further emphasized when the population was merged into the two groups 'low social position' and 'middle/high social position', with 'low social position' as a risk for CBE (OR=1.35, 95% CI=1.06-1.72). No social risk factors were identified for asthma. Living close to heavy traffic was a risk factor for asthma (OR=1.29, 95% CI=1.02-1.62) but not for CBE. Apart from this no living environmental risk factors for obstructive pulmonary diseases were identified. Asthma symptoms and long-standing cough were more common among those subjects living close to heavy traffic compared to those not living close to heavy traffic. To conclude, low social position was a risk factor for CBE and living close to heavy traffic was a risk factor for asthma.