4.4 Outlook
Future investigations concerned with the effect of early-life eczema on allergic multimorbidity should consider the integration of disease severity for eczema, food allergies, asthma and hay fever, since it was repeatedly shown that eczema severity was associated with the development and severity of other allergic diseases.13,18,21,40 Further, there seems to be a heterogenic association between eczema phenotypes and different allergenic foods.22 This distinction could result in a more detailed understanding of the allergen specific associations present among comorbid allergic diseases, if applied to future studies.