25(OH)D3	25-hydroxyvitamin D3
SPT	skin prick testing
aMOR	adjusted multinomial odds ratio
VDR	vitamin D receptors
MACS	Melbourne Atopy Cohort Study
DBS	dried blood spots
LC/MS	liquid chromatography–tandem mass spectrometry
BIC	Bayesian information criterion
GEE	generalized estimation equation
DAG	directed acyclic graph
VCGS	Victorian Clinical Genetics Services
SES	socio-economic status
HREC	Human Research Ethics Committee