Between January 2013 and June 2014, families were recruited at Kätilöopisto Helsinki Maternity Hospital, Helsinki, Finland. The primary outcomes were bone strength and incidence of parent-reported infections. Secondary outcomes included child growth and development, and incidence of asthma and allergies. Main results have been published (see publications).
VIDI follow-up study (VIDI2)
We conducted VIDI follow-up study between years 2019-2022 when children were 6-8 years old. Main aim of the follow-up study is to investigate long-term health consequences of early childhood vitamin D intervention.
Study is carried out by HUS Helsinki University Hospital together with University of Helsinki, in a collaboration with Folkhälsan Research Center and Karolinska Institutet.