title: Does overweight in infancy persist through the preschool years? An analysis of CDC Pediatric Nutrition Surveillance System data.
abstract: OBJECTIVE
  To determine whether overweight in infancy (0-11 months) and young childhood (12-35 months) persists through the preschool years.
  
  
  METHODS
  Analysis of longitudinal surveillance data for 380 518 low-income children monitored in the U.S. Pediatric Nutrition Surveillance System from birth to age 59 months. Overweight was defined as weight-for-height > or = 95th percentile. We determined the proportion of the children (overweight vs non-overweight) above or below the 95th percentile of weight-for-height at the later ages.
  
  
  RESULTS
  The relative risk (RR) for overweight among overweight infants (vs non-overweight infants) at 1, 2, 3 and 4 years old was 4.3, 3.5, 3.3, and 2.9, respectively. 62.5% of overweight 3-year-old was still overweight a year later, but only 4.1% non-overweight 3-year-old became overweight a year later (RR = 15.2). However, low birth weight children had the highest RR to remain overweight after they became overweight compared to normal and high birth weight children.
  
  
  CONCLUSIONS
  Overweight during infancy persists through the preschool years. Tracking of overweight appears to become stronger as children get older and is more pronounced among low birth weight children than normal or high birth weight children. Monitoring preschoolers' height and weight status should be a strategy for preventing of obesity in adolescence and adulthood.
authors.affiliation: Maternal and Child Nutrition Branch, Division of Nutrition and Physical Activity, National Center for Chronic Disease, Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, USA. zmei@cdc.gov
authors.forename: Zuguo
authors.initials: Z
authors.lastname: Mei
authors.forename: Laurence M
authors.initials: LM
authors.lastname: Grummer-Strawn
authors.forename: Kelley S
authors.initials: KS
authors.lastname: Scanlon
mesh_terms: D001827:Body Height; D001835:Body Weight; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008137:Longitudinal Studies; D008297:Male; D009749:Nutrition Surveys; D009765:Obesity / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D011159:Population Surveillance; D014481:United States / Q000453:epidemiology