title: How boys grow determines how long they live.
abstract: OBJECTIVE
  Increase in height in modern societies has been accompanied by an in increase in lifespan. The longer lives of taller people suggest that good nutrition during childhood, together with freedom from recurrent minor infection, prolong human life. There is, however, a caveat. Tall adult stature may be the result of rapid "compensatory" growth following a setback. Compensatory growth is known to reduce the lifespan of animals, possibly because it is disorganized.
  
  
  METHODS
  We analyzed lifespan among 6,975 men born in Helsinki, Finland, during 1934-44. Their early growth was recorded.
  
  
  RESULTS
  Boys who were tallest at seven years of age had lower all cause mortality, the hazard ratio being 0.79(95%CI 0.70 to 0.89, P < 0.0001) per 10 cm increase in height. There was, however, a group of boys among whom being tall was associated with increased all cause mortality, the hazard ratio being 1.32(1.00 to 1.75, P = 0.05). These boys were taller at seven years than their birthweight and length at birth predicted. After they were excluded from the analysis, boys who were more than 126 cm in height at seven lived for eight years longer than those who were 114 cm or less. This increase in lifespan was similar to the effect of high socio-economic status in adult life.
  
  
  CONCLUSIONS
  Rapid growth in childhood height usually predicts a longer life. But tallness among men may be a misleading indicator of wellbeing and longer life expectancy in populations where compensatory growth is widespread. African Americans may be an example. Am. J. Hum. Biol., 2011. © 2011 Wiley-Liss, Inc.
authors: MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, United Kingdom. djpbarker@gmail.com
authors: David
authors: D
authors: J P Barker
authors: Eero
authors: E
authors: Kajantie
authors: Clive
authors: C
authors: Osmond
authors: Kent L
authors: KL
authors: Thornburg
authors: Johan G
authors: JG
authors: Eriksson
mesh_terms: D000328:Adult; D001827:Body Height; D015331:Cohort Studies; D005387:Finland; D005500:Follow-Up Studies; D006803:Human Development; D006801:Humans; D008017:Life Expectancy; D008297:Male; D012189:Retrospective Studies; D012307:Risk Factors; D012959:Socioeconomic Factors