TABLE 1.

Collaborating studies and centres

Centre	Characteristics	Study type
Avon Longitudinal Study of Parents and Children (ALSPAC), Bristol, UK	A high prevalence centre in a HIC	Birth cohort study with extensive detailed longitudinal information# New data collection at age 26–27 years
Centre for Public Health Research (CPHR), Wellington, New Zealand	A high prevalence centre in a HIC	NZAZCS birth cohort New data collection at age 16–20 years Cross-sectional study in children aged 12–16 years recruited from schools and the community
Social Change, Asthma and Allergy in Latin America (SCAALA), Salvador, Brazil	A high prevalence centre in a LMIC	SCAALA cohort New data collection at age 11–19 years Cross-sectional study in children aged 11–19 years recruited from three schools
Social Change, Asthma and Allergy in Latin America (SCAALA), Esmereldas, Ecuador	A medium prevalence centre in a LMIC	Population-based cohort New data collection at age 8–12 years Cross-sectional study in children aged 12–16 years recruited from schools
Entebbe childhood asthma study, Entebbe, Uganda	A low prevalence centre in a LMIC	Cross-sectional study in children aged 12–16 years recruited from schools

HIC: high-income country; LMIC: low and middle-income country. ^#: the study website (www.bris.ac.uk/alspac/researchers/data-access/data-dictionary) contains details of all the data that are available through a fully searchable data dictionary.