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We examine the circulating metabolic profile by quantitative NMR metabolomics of a sample of Australian 11\u201312 year olds children and their parents, describe differences by age and sex, and explore the correlation of metabolites in parent\u2013child dyads.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>The population-based cross-sectional Child Health CheckPoint study nested within the Longitudinal Study of Australian Children.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>Blood samples collected from CheckPoint participants at assessment centres in seven Australian cities and eight regional towns; February 2015\u2013March 2016.<\/jats:p><\/jats:sec><jats:sec><jats:title>Participants<\/jats:title><jats:p>1180 children and 1325 parents provided a blood sample and had metabolomics data available. This included 1133 parent\u2013child dyads (518 mother\u2013daughter, 469 mother\u2013son, 68 father\u2013daughter and 78 father\u2013son).<\/jats:p><\/jats:sec><jats:sec><jats:title>Outcome measures<\/jats:title><jats:p>228 metabolic measures were obtained for each participant. We focused on 74 biomarkers including amino acid species, lipoprotein subclass measures, lipids, fatty acids, measures related to fatty acid saturation, and composite markers of inflammation and energy homeostasis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>We identified differences in the concentration of specific metabolites between childhood and adulthood and in metabolic profiles in children and adults by sex. In general, metabolite concentrations were higher in adults than children and sex differences were larger in adults than in children. Positive correlations were observed for the majority of metabolites including isoleucine (CC 0.33, 95%\u2009CI 0.27 to 0.38), total cholesterol (CC 0.30, 95%\u2009CI 0.24 to 0.35) and omega 6 fatty acids (CC 0.28, 95%\u2009CI 0.23 to 0.34) in parent\u2013child comparisons.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>We describe the serum metabolite profiles from mid-childhood and adulthood in a population-based sample, together with a parent\u2013child concordance. Differences in profiles by age and sex were observed. These data will be informative for investigation of the childhood origins of adult non-communicable diseases and for comparative studies in other populations.<\/jats:p><\/jats:sec>","DOI":"10.1136\/bmjopen-2017-020900","type":"journal-article","created":{"date-parts":[[2019,7,4]],"date-time":"2019-07-04T20:55:28Z","timestamp":1562273728000},"page":"106-117","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":59,"title":["Metabolomics: population epidemiology and concordance in Australian children aged 11\u201312 years and their 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