Table 1.

Illustrative Big Datasets Hosted by Governmental Entities

Dataset	Sample	URL
Current Population Survey (CPS)		http://www.bls.gov/cps/demographics.htm
Danish National Birth Cohort	n = 100,000 women recruited in 1999–2002, assessed during pregnancy and when children were 6 months, 18 months, 7 years, and 11 years	http://www.ssi.dk/English/RandD/Research
Early Childhood Longitudinal Study (ECLS)	Birth cohort (ECLS‐B): n = 14,000 children born in 2001 from birth through kindergarten; ECLS‐K cohort: kindergarten through eighth grade; ECLS‐K:2011: kindergarten through fifth grade	http://nces.ed.gov/ecls/
Japan Environment and Children's Study (JECS)	n = 100,000 parent–child pairs	http://www.env.go.jp/en/chemi/hs/jecs/
National Health and Nutrition Examination Survey (NHANES)	nationally representative sample of n = 5000	http://www.cdc.gov/nchs/nhanes.htm
National Longitudinal Survey of Youth (NLSY)	n = 10,000 youth born in 1957–1964, surveyed beginning in 1979.	http://www.bls.gov/nls/
National Youth Fitness Survey (NYFS)	n = 1650, 3‐ to 15‐year olds surveyed in 2012	http://www.cdc.gov/nchs/nnyfs.htm
NICHD Study of Early Child Care and Youth Development (SECCYD)	n = 1364 infants born in 1991	https://www.nichd.nih.gov/research/supported/Pages/seccyd.aspx
NICHD Data and Specimen Hub (DASH)	Deidentified data from NICHD funded research studies	https://dash.nichd.nih.gov
NIH MRI Study of Normal Brain Development	n = 554, 4‐ to 18‐year olds	http://pediatricmri.nih.gov/nihpd/info
NIMH National Database for Autism Research (NDAR)	n > 85,000 individuals	http://ndar.nih.gov
Norwegian Mother and Child Cohort Study (MoBa)	n > 90,000 pregnant women and n > 70,000 men, recruited in 1999–2008	http://www.fhi.no/eway/
WHO Multicentre Growth Reference Study (MGRS)	n = 8500, 0‐ to 24‐month olds and 18‐ to 71‐month olds	http://www.who.int/childgrowth/en/