Atopic Dermatitis in Children Under 5: Prevalence Trends in Central, Eastern, and Western Europe

BACKGROUND

Atopic dermatitis is a major public health issue worldwide, but data on trends in prevalence in children in European countries are sparse. The aim of this study was to assess the trends in the prevalence of atopic dermatitis in children under 5 in the Central, Eastern, and Western European sub-regions from 1990 to 2019.

METHODS

In this study, a descriptive, observational epidemiological method was applied. In addition, an ecological study design was used. Joinpoint regression analysis was used to assess trends.

RESULTS

A total of 118 million (54 million males and 64 million females) prevalent cases of atopic dermatitis in children under 5 were reported in European countries in 1990-2019. More than half of all cases of atopic dermatitis in children under 5 in Europe were recorded in the Western European sub-region. The highest prevalence rates of atopic dermatitis in children under 5 were observed in the Eastern European sub-region, with the highest rates in both males and females recorded in Estonia (equally at about 15,000 per 100,000), followed by the Russian Federation (equally at about 12,000 per 100,000). Moreover, the lowest prevalence rates were reported in the Eastern European sub-region (equally at about 5000 per 100,000 in Romania and Latvia). A sex disparity in the prevalence and trends of atopic dermatitis in children under 5 was observed. A significantly increased trend in atopic dermatitis prevalence in children under 5 was recorded in the Eastern European sub-region from 1990 to 2019 (by +0.3% per year in males and by +0.1% per year in females). Conversely, in the Western and Central European sub-regions, trends in the prevalence of atopic dermatitis in children under 5 slightly decreased (about -0.1% per year). The Pearson coefficient showed a significant negative correlation between the prevalence of atopic dermatitis in children under 5 and the Human Development Index in most countries in the Eastern European sub-region, while a significant positive correlation was reported between the prevalence and HDI in high-income countries in the Western European sub-region.

CONCLUSIONS

High prevalence rates and mostly stable trends during the last three decades make atopic dermatitis still a major health issue in children under 5 in European countries.

Experience Of Ocular Symptoms Among Allergic Rhinitis Patients Depending On The Type Of Aeroallergens

The aim of this study was to determine the frequency of ocular symptoms and compare the demographic and clinical characteristics in AR patients depending on sensitisation to various types of aeroallergens.

Allergic rhinitis is defined as an IgE-mediated inflammation of the lining of the nose that is characterized by nasal symptoms, including nasal congestion, sneezing, itching of nose and runny nose. Patients suffering from allergic rhinitis frequently experience ocular symptoms such as ocular redness, eye itching and tears. The frequency of ocular symptoms in our study population was 27,6%. No statistical significance was found in the mean ages of the patients who did or did not experience ocular symptoms p>0,05 (p=0,243). Our results indicated that there were no statistical differences (p>0,05) among the groups of allergic rhinitis patients based on experiencing nasal symptoms according to the types of aeroallergens. Our results indicated that there were significant experiences of ocular symptoms in patients who were sensitised to outdoor aeroallergens (p<0,001) and significant sensitisation to both outdoor and indoor aeroallergens (p<0,05). Experiencing the examined ocular symptoms, including ocular redness, eye itching and tears, demonstrated highly statistical significance (p<0,001) among the groups of allergic rhinitis patients who were sensitised to indoor aeroallergens and outdoor aeroallergens, and there was statistical significance (p<0,05) among the groups of allergic rhinitis patients who were sensitised to indoor aeroallergens and both types of aeroallergens (indoor and outdoor).

Ocular symptoms are more common in patients who are sensitised to outdoor aeroallergens.