Is this the one you are thinking of?  They *didn't* find less 
delinquency with increasing duration of bfdg, but did find closer 
parent-child relationships.

Margaret
Longmont, CO


http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=Retrieve&db=PubMed&list_uids=10214606&dopt=Citation

Paediatr Perinat Epidemiol. 1999 Apr;13(2):144-57.

Breast feeding and later psychosocial adjustment.

Fergusson DM, Woodward LJ.

Christchurch School of Medicine, New Zealand.

The relationship between the duration of breast feeding and 
psychosocial outcomes measured between the ages of 15 and 18 years 
was examined in a birth cohort of 999 New Zealand children. During 
the period from birth to 1 year, information was collected on 
maternal breast-feeding practices. Between the ages of 15 and 18 
years, sample members were assessed using a range of psychosocial 
measures, including measures of the quality of parent-child 
relationships, juvenile delinquency, substance abuse and mental 
health.

Children who were breast fed for a longer duration were more likely 
to report higher levels of parental attachment and tended to perceive 
their mothers as being more caring and less overprotective towards 
them compared with bottle-fed children.

No association was found between the extent of breast feeding and 
subsequent rates of juvenile offending, substance use and mental 
health in later life.

Mothers who elected to breast feed were also more likely to be older, 
better educated, living with a partner, less likely to smoke during 
pregnancy, and to come from advantaged socio-economic backgrounds 
characterised by better living standards and a higher family income. 
Rates of breast feeding were also greater among mothers who gave 
birth to a first-born child of higher birthweight. After adjustment 
for these maternal and perinatal factors, the duration of breast 
feeding remained significantly associated with adolescent perceptions 
of maternal care, with increasing duration of breast feeding being 
associated with higher levels of perceived maternal care during 
childhood. It is concluded that: (a) it is unlikely that breast 
feeding is associated with reduced risks of psychiatric disorder in 
later life; (b) breast feeding may lead to closer parent-child 
relationships; and (c) it is unlikely that the association between 
breast feeding and cognitive development is mediated by intervening 
processes relating to improved psychosocial adjustment in breast-fed 
children.



>My graduate student (social work) daughter is writing a paper on attachment 
>theory and Erikson's theory of life's stages, and I brought up to her what I 
>think was a study done on duration of breastfeeding influencing whether teens 
>join gangs (the conclusion was not as likely due to their attachment to 
>mom).  Does anyone remember this study and have the resource, 
>perhaps?  I can't
>remember whether I heard of this as LLL leader or during  an early
>breastfeeding conference I attended.  I welcome replies off list, 
>as well as to this
>list.  Thank you.
>
>Barbara Latterner, BSN, RN, IBCLC

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