This review of trends in worldwide asthma prevalence starts with defining how asthma
prevalence is measured in populations and how it is analysed. Four population studies of …

The importance of the microbiome, and of the gut-lung axis in the origin and persistence of
asthma, is an ongoing field of investigation. The process of microbial colonisation in the first …

Background Prenatal vitamin D status may influence offspring's respiratory and allergic
outcomes; however, evidence is inconclusive. A systematic review and meta‐analysis were …

Background Certain foods may increase or decrease the risk of developing asthma,
rhinoconjunctivitis and eczema. We explored the impact of the intake of types of food on …

Background Recurrent wheezing (RW) during the first year of life is a major cause of
respiratory morbidity worldwide, yet there are no studies on its prevalence at an international …

Background Asthma is the most common chronic disease in children globally. The Global
Asthma Network (GAN) Phase I study aimed to determine if the worldwide burden of asthma …

Aims There have been no worldwide standardised surveys of prevalence and severity of
asthma, rhinoconjunctivitis and eczema in school children for 15 years. The present study …

The Global Asthma Network (GAN), established in 2012, followed the International Study of
Asthma and Allergies in Childhood (ISAAC). ISAAC Phase One involved over 700 000 …

Aims Asthma, hay fever and eczema are three common chronic conditions. There have been
no recent multi-country data on the burden of these three conditions in adults; the aims of …

Background: Associations between exposure to cats and dogs and respiratory and allergic
outcomes in children have been reported in affluent countries, but little is known about such …