Background Several time‐series studies have shown positive associations between pollen
levels and asthma morbidity. However, few studies have included air pollution as a potential …

Background: Few studies have used time series to investigate the relationship between
asthma attacks and aeroallergen levels on a daily basis. Methods: This study, based on time …

Exposure to pollen can contribute to increased hospital admissions for asthma exacerbation.
This study applied an ecological time series analysis to examine associations between …

BACKGROUND: Associations found in time-series studies on hospital emergency room (ER)
visits due to asthma and chronic obstructive pulmonary disease (COPD) with single air …

Background The effects of environmental factors and ambient concentrations of grass pollen
on allergic asthma are yet to be established. Objective We sought to estimate the …

Background In recent years there has been a notable increase in respiratory diseases in
industrialised countries, which is attributed to a combination of chemical atmospheric …

Many time-series studies have shown positive associations between air pollutants and
asthma morbidity. However, few studies have included pollen as a potential confounder …

CONTEXT AND OBJECTIVE: Asthma among children is a major public health problem
worldwide. There are increasing number of studies suggesting a possible association …

Background Despite the fact that airborne pollen is an important factor in precipitating
asthma attacks, its implication in increases of epidemic asthma in usual meteorological …

Background: Many studies have demonstrated a positive association between air pollutants
and emergency visits for asthma. However, few studies have included pollen when …