title: Challenges in measuring changes in health and social indicators over time.
authors.affiliation: McGill University, Montreal Children's Hospital Research Institute, 4060 Ste Catherine W #205, Westmount, Quebec, Canada. robert.platt@mcgill.ca
authors.forename: Robert W
authors.initials: RW
authors.lastname: Platt
authors.forename: Jennifer
authors.initials: J
authors.lastname: Zeitlin
mesh_terms: D001724:Birth Weight; D005317:Fetal Growth Retardation / Q000175:diagnosis* / Q000453:epidemiology / Q000209:etiology; D006305:Health Status Indicators; D006801:Humans; D007231:Infant, Newborn; D012016:Reference Values; D012307:Risk Factors; D012959:Socioeconomic Factors