Adverse childhood environment and late-life cognitive functioning

OBJECTIVE: Clinical studies suggest that childhood maltreatment may cause nervous system changes and consequent cognitive disorder. The persistence of this association in late-life is examined. METHODS: Cognitive functioning and childhood events were examined in 1282 persons over 65 years, taking into account proximal competing causes of poor cognitive performance. RESULTS: Ninety one per cent experienced at least one adverse childhood event, of these 14.7% severe events. Sharing of parental problems and, for women, loss of a parent were associated with poorer verbal retrieval whereas being sent to a foster home or mistreatment by schoolmates was associated with poorer visuospatial memory. Severe abuse was associated with a lower risk of cognitive impairment on some tests suggesting a resilience factor. Positive childhood environment was protective although only for non-carriers of the ApoE ε4 allele on the central executive task. CONCLUSIONS: Some adverse childhood events continue to have a negative effect on later-life cognitive performance, while some more severe acute events may have the opposite effect, underlying the necessity to consider events individually and not as global test scores.