# Association between climate indicators and hay fever incidence in children and adolescents in Freiburg, Germany

## TL;DR

This study explores how climate factors like temperature and wind speed relate to hay fever rates in children and adolescents in Freiburg, Germany.

## Contribution

The study identifies specific temperature and wind speed ranges associated with hay fever incidence in a German urban setting.

## Key findings

- Hay fever incidence was significantly associated with temperature ranges of 4–6°C and 10–17°C.
- Wind speeds between 2.0 and 2.1 m/s were also significantly linked to hay fever incidence.
- No significant associations were found with precipitation, PM10, NO2, or O3 levels.

## Abstract

Allergic conditions including hay fever are a sentinel measure of environmental impact on human health in early life. In this study we investigated the association between climate indicators and allergic rhinitis (hay fever) incidence in children and adolescents in Freiburg im Breisgau (Germany), as a representative study site for an urban German environment.

Data on climate indicators and hay fever incidence in children and adolescents in the period 2013 to 2021 were implemented within the free software environment for statistical computing R using generalized additive Gamma family models.

Our results from all “seasonal”, “non-seasonal”, and “single-factor” models could not support the associations between the hay fever incidence and the precipitation as well as the concentrations of PM10, NO2, and O3 in Freiburg. However, they indicated statistically significant associations with temperature, and wind speed at the 5% level. The hay fever incidence was highest, as the temperature was between 4–6°C, and 10–17°C, and the wind speed was between 2.0 and 2.1m/s.

This knowledge could be of relevance for the choice of patient treatment procedure in Freiburg, as the symptoms of a cold or flu can easily be mistaken for an allergy, especially in the cold season.