title: Early Parturition: Is Young Maternal Age at First Birth Associated with Obesity?
abstract: OBJECTIVE
  Examine the association of age at first birth with body mass index (BMI), and explore the role of young maternal age and subsequent obesity.
  
  
  METHODS
  This study analyzed data from the Panel Study of Income Dynamics, a nationally representative longitudinal study of US families. Analyses were conducted using a mixed effects longitudinal linear regression with a random intercept to examine the effect of aging, age at first birth, and minority status using nested data. Study criteria yielded a final sample of 146 women with 707 observations.
  
  
  METHODS
  BMI.
  
  
  RESULTS
  Age at first birth exhibited a significant association with BMI. The association of age at first birth with BMI was greatest for women age 21 and younger. Overall, women who experienced their first birth at age 21 or younger had a BMI 5 units greater than women who delayed childbearing until at least age 30 (point estimate, 5.02; P = .02; 95% confidence interval, 0.65-9.40).
  
  
  CONCLUSIONS
  Young maternal age at first birth might be associated with increased BMI. Minority women also experience their first birth at younger ages compared with white women, suggesting possible linkages between the timing of reproductive events and obesity disparities.
authors.affiliation: Obstetrics and Gynecology, MedStar Washington Hospital Center, Washington, District of Columbia. Electronic address: Loral.Patchen@medstar.net.
authors.forename: Loral
authors.initials: L
authors.lastname: Patchen
authors.affiliation: School of Medicine, Johns Hopkins University, Baltimore, Maryland.
authors.forename: Jeannie-Marie
authors.initials: JM
authors.lastname: Leoutsakos
authors.affiliation: Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland.
authors.forename: Nan M
authors.initials: NM
authors.lastname: Astone
mesh_terms: D000293:Adolescent; D000328:Adult; D001722:Birth Order; D015992:Body Mass Index; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008423:Maternal Age; D008875:Middle Aged; D009765:Obesity / Q000150:complications*; D036801:Parturition; D011247:Pregnancy; D055815:Young Adult
keywords: Obesity; Pregnancy in adolescence; Reproductive behavior