Respiratory symptoms/diseases, impaired lung function, and drug use in two Italian general population samples

Respiratory diseases and allergic sensitization in swine breeders: a population-based cross-sectional study

BACKGROUND

The daily occupation as a swine breeder involves exposure to several bacterial components and organic dusts and inhalation of a large amount of allergens.

OBJECTIVE

To investigate the risk of respiratory diseases and atopy in swine breeders compared with the general population living in the same area.

METHODS

A population-based cross-sectional study was conducted in an agricultural area of northern Italy that enrolled a random sample of resident male breeders and non-breeders. Demographic features, comorbidities, and presence of allergic respiratory disease were retrieved through interview. Prick tests for common allergens were performed. An evaluation of pollen and mold in air samples taken inside and outside some swine confinement buildings also was performed.

RESULTS

One hundred one male breeders (78 native-born, mean age ± SD 43.0 ± 11.1 years) and 82 non-breeders (43.0 ± 11.1 years) were enrolled. When restricting the analysis to native-born subjects, breeders vs non-breeders showed a lower prevalence of respiratory allergy (12.8% vs 31.1%, respectively, P = .002), asthma (6.4% vs 15.8%, P = .059), rhinitis (16.7% vs 51.2%, P < .001), persistent cough (5.1% vs 15.9%, P = .028), and sensitization to grass (7.7% vs 25.6%, P = .002). There was no difference in prick test positivity, polysensitization, nasal cytologic pattern, forced expiratory volume in 1 second, and the ratio of forced expiratory volume in 1 second to forced vital capacity between breeders and non-breeders. Air concentration of molds and pollens was lower inside than outside the swine buildings investigated, particularly when the pigs were inside vs outside the buildings.

CONCLUSION

This study suggests that swine breeding does not increase, and might decrease, the risk of pollen sensitization and allergic disease.

Five-fold increase in use of inhaled corticosteroids over 18 years in the general adult population in west Sweden

INTRODUCTION

Asthma medication was increasingly used during the second part of the past century. There are few detailed data from population studies on use of asthma medication. The current study aimed to determine the use and determinants of asthma medication in West Sweden and to assess changes during the last two decades.

METHODS

From a random population sample participating in a survey on respiratory symptoms, 2000 individuals were randomly selected for clinical examinations and structured interviews, 1172 participated. All subjects reporting asthma (n = 1524) were also invited, and 834 participated. In total, 964 subjects with asthma participated. Asthma medication use was assessed in the general population and among two severity categories of asthma: multi-symptom asthma (MSA) and "other" asthma (having fewer symptoms). Current data, from 2010, was compared with data from 1992.

RESULTS

Asthma medication was used by 11% of the population, 4.4% used ICS with concurrent use of LABA, 3.3% used ICS without LABA, while 3.2% only used SABA. Compared with 1992, the prevalence of asthma medication use had increased with 54%, and use of ICS had increased from 1.5% to 7.7%.

CONCLUSION

Subjects with MSA reported using asthma medication more frequently and at higher doses, and a higher proportion used ICS.A shift in asthma medication use has occurred since 1992, with increased use of ICS and decreased use of SABA only, implying better asthma control on a population level. Multi-symptom asthma should alert the treating physician to consider under-medication and/or poor treatment adherence.

Use patterns of long-acting bronchodilators in routine COPD care: the OUTPUL study

BACKGROUND

COPD is the fourth leading cause of death in the world. In the case of exacerbations or persistent symptoms, regular treatment with long-acting bronchodilators is recommended to control the symptoms, reduce exacerbations and improve health status. Objectives. To describe patterns of drug utilization among patients diagnosed with COPD, to measure continuity with long-acting bronchodilators, to identify determinants of not receiving long-acting therapy continuously.

METHODS

We identified a cohort of patients discharged from hospital with diagnosis of COPD between 2006 and 2008. Patients were observed for a two-year follow-up period, starting from the day of discharge. Follow-up was segmented in six-month periods, in order to dynamically evaluate prescription patterns of Long-Acting Beta-Agonists (LABA), tiotropium, and inhaled corticosteroids. Patients with prescriptions for LABA and/or tiotropium in each of the six-month periods were defined as "continuously treated with long-acting bronchodilators." The degree of drug treatment coverage was measured through the Medication Possession Ratio (MPR). Logistic regression was performed to identify determinants of not receiving long-acting bronchodilators continuously.

RESULTS

A total of 11,452 patients diagnosed with COPD were enrolled. Only 34.8% received long-acting bronchodilators continuously. The MPR was greater than 75% in 19.6% of cases. Among the determinants of not receiving long-acting bronchodilators continuously, older age and co-morbidities played an important role.

CONCLUSIONS

In clinical practice, the COPD pharmacotherapy is not consistent with clinical guidelines. Medical education is needed to disseminate evidence-based prescribing patterns for COPD, and to raise awareness among physicians and patients on the health benefits of an appropriate pharmacological treatment.

Change in asthma and COPD prescribing by Italian general practitioners between 2006 and 2008

AIMS

To explore the trend in prescribing of drugs classified within the R03 therapeutic pharmacological subgroup (drugs for obstructive airway diseases) of the Anatomical Therapeutic Chemical (ATC) classification.

METHODS

Comparison of GP-collected data on physician-patient contacts and drug prescriptions for asthma and COPD in 2006 and 2008.

RESULTS

Compared to 2006, in 2008 patients with COPD were prescribed more long-acting bronchodilators; use of tiotropium increased, whilst use of long-acting β2-agonists (LABAs) and short-acting antimuscarinic agents decreased. However, 55.9% of patients in 2006, and 47.8% in 2008, received an inhaled corticosteroid (ICS), mainly as a LABA/ICS fixed combination inhaler. Compared to 2006, in 2008 there were increased prescriptions of LABA/ICS fixed combination inhalers for asthma, but only 54.5% of all prescriptions included an ICS. This could explain the large use of short-acting β2-agonists, a marker of poor asthma control. Remarkably, LABA/ICS fixed combination inhalers were prescribed more frequently in COPD than in asthma.

CONCLUSIONS

Our data indicate that adherence to guidelines is still low. Patients with asthma and COPD are undertreated by Italian GPs, with a trend to a change in COPD prescribing likely driven by new scientific information.

Use of respiratory medication in five Latin American cities: The PLATINO study

BACKGROUND

There is scanty information regarding respiratory medication prescription pattern in Latin America. We examined the use of bronchodilators and corticosteroids in a population-based study conducted in five Latin American cities.

METHODS

Medication use was derived from questions regarding the use of medication "to help breathing" within the previous 12 months, type of medicine, and frequency of use. To minimize the possibility of overdiagnosis, we used postbronchodilator FEV(1)/FVC<0.70 plus FEV(1)<80% as the definition of obstruction.

RESULTS

Interviews were completed in 5571 subjects from 6711 eligible individuals, and spirometry was performed in 5314 subjects. There were 360 (6.5%) treated subjects and 5211 not treated. Treated subjects were more likely to be older, women, unemployed, have higher tobacco consumption, higher body mass index, higher FEV(1) reversibility and airway obstruction. They were also more likely to report prior spirometry, prior diagnosis of COPD, asthma or tuberculosis, and more respiratory symptoms. Over half of treated subjects had neither obstruction nor FEV(1) reversibility, and approximately 30% reported no prior diagnosis of asthma or COPD. Prior respiratory diagnoses and wheezing were more strongly associated with treatment than objective measures of airway obstruction.

CONCLUSIONS

The use of bronchodilators and/or corticosteroids is common in the general population aged 40 years or older, with over one-half of treated subjects using them without being obstructed.