Related Experiment Video
Updated: Mar 24, 2026

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
Published on: March 3, 2023
Association between environmental factors and hospital visits among allergic patients: A retrospective study
1Department of Ears, Nose, and Throat (ENT), Shanghai Children Medical Center Affiliated of Shanghai Jiaotong University Medical College, Shanghai 200127, China.
Objective:
This study investigated correlations between meteorological and environmental factors (MEFs) and allergic rhinitis in childhood (ARC).
Methods:
Children who received treatment for AR and meteorological data that might have influenced AR in the same time period were included in this study. Daily average maximum values of sulfur dioxide (SO2), nitrogen dioxide (NO2), and particulate matter (PM10) at 3 a.m. and 8 a.m. were provided by the Shanghai Environmental Bureau for statistical analysis using a generalized additive model (GAM).
Results:
Outpatient visits for ARC were higher, with a bimodal shape, for daily average temperatures of about 11 ° C and 21 ° C. However, increasing humidity was associated with a downward trend in outpatient visits for ARC, suggesting that high humidity had a protective effect on AR. When levels of air pollutants such as O3, SO2, and PM10 increased by 10 μg/m3, AR outpatient visits increased by 1.95%, 1.19% and 0.33%, respectively, suggesting that air pollution might increase the risk of AR episodes.
Conclusions:
MEFs were significantly correlated with the incidence of ARC.
More Related Videos
Related Concept Videos
Asthma-I: Introduction
Allergic Reactions: Anaphylaxis
Allergic Reactions
Asthma-III: Symptoms and Complications
Classification of Asthma
Asthma-II: Pathophysiology and Classification
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.

