title: Childhood Maltreatment, Depression, and Suicidal Ideation: Critical Importance of Parental and Peer Emotional Abuse during Developmental Sensitive Periods in Males and Females.
abstract: BACKGROUND
  The adverse childhood experience (ACE) study found that risk for depression increased as a function of number of types of childhood maltreatment, and interpret this as a result of cumulative stress. An alternative hypothesis is that risk depends on type and timing of maltreatment. This will also present as a linear increase, since exposure to more types of abuse increases likelihood of experiencing a critical type of abuse at a critical age.
  
  
  METHODS
  560 (223M/337F) young adults (18-25 years) were recruited from the community without regard to diagnosis and balanced to have equal exposure to 0-4 plus types of maltreatment. The Maltreatment and Abuse Chronology of Exposure Scale assessed severity of exposure to 10 types of maltreatment across each year of childhood. Major depressive disorder (MDD) and current symptoms were evaluated by SCID, interview, and self-report. Predictive analytics assessed importance of exposure at each age and evaluated whether exposure at one or two ages was a more important predictor than number, severity, or duration of maltreatment across childhood.
  
  
  RESULTS
  The most important predictors of lifetime history of MDD were non-verbal emotional abuse in males and peer emotional abuse (EA) in females at 14 years of age, and these were more important predictors across models than number of types of maltreatment (males: t 9 = 16.39, p < 10(-7); females t 9 = 5.78, p < 10(-4)). Suicidal ideation was predicted, in part, by NVEA and peer EA at age 14, but most importantly by parental verbal abuse at age 5 in males and sexual abuse at age 18 in females.
  
  
  CONCLUSIONS
  This study provides evidence for sensitive exposure periods when maltreatment maximally impacts risk for depression, and provides an alternative interpretation of the ACE study results. These findings fit with emerging neuroimaging evidence for regional sensitivity periods. The presence of sensitive exposure periods has important implications for prevention, preemption, and treatment of MDD.
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA ; Department of Psychiatry, Harvard Medical School , Belmont, MA , USA.
authors: Alaptagin
authors: A
authors: Khan
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA.
authors: Hannah C
authors: HC
authors: McCormack
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA.
authors: Elizabeth A
authors: EA
authors: Bolger
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA.
authors: Cynthia E
authors: CE
authors: McGreenery
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA ; Department of Psychiatry, Harvard Medical School , Belmont, MA , USA.
authors: Gordana
authors: G
authors: Vitaliano
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA ; Department of Psychiatry, Harvard Medical School , Belmont, MA , USA ; School of Nursing, Northeastern University , Belmont, MA , USA.
authors: Ann
authors: A
authors: Polcari
authors: Developmental Biopsychiatry Research Program, McLean Hospital , Belmont, MA , USA ; Department of Psychiatry, Harvard Medical School , Belmont, MA , USA.
authors: Martin H
authors: MH
authors: Teicher
keywords: childhood maltreatment; depression; developmental sensitive periods; gender differences; predictive modeling; suicidal ideation