[Review of the effectiveness of cognitive interventions in preventing cognitive deterioration in healthy elderly individuals].
BACKGROUND
In the last few years, several non-pharmacological interventions have been developed to prevent age-associated cognitive deterioration, specifically memory deterioration. The effectiveness of these interventions has not been sufficiently evaluated.


OBJECTIVE
To determine the effectiveness of cognitive interventions in preventing age-associated memory impairment by means of a literature review.


METHODS
An exhaustive search was carried out in PubMed. Studies published from 1990 onwards that assessed the effectiveness of cognitive interventions on memory outcomes in older adults without mild cognitive impairment or dementia were included. The studies were classified according to their quality. The short- and long-term effects of the interventions on objective and subjective memory tasks and transfer of gains to other cognitive domains were assessed.


RESULTS
Twenty-five studies met the inclusion criteria. Eleven (44%) were considered high-quality, of which all except one reported improved memory outcomes. The most common type of memory assessed was recent verbal objective memory, which improved in eight out of nine high-quality studies. Recent non-verbal and association objective memory, mainly assessed in medium-quality studies, improved in four out of seven and in 10 out of 11 studies, respectively. The results concerning subjective memory were heterogeneous. Transfer of gains was only observed in one out of seven high-quality studies.


CONCLUSIONS
The results of this study suggest that certain cognitive interventions performed in healthy older adults are effective in preventing cognitive deterioration, especially recent verbal memory.
Novoa
Ana M
AM
Agència de Salut Pública de Barcelona, Barcelona, Spain.
Juárez
Olga
O
Nebot
Manel
M
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003071:Cognition; D003072:Cognition Disorders / Q000175:diagnosis / Q000517:prevention & control*; D005500:Follow-Up Studies; D015577:Geriatric Assessment; D006801:Humans; D008569:Memory Disorders / Q000175:diagnosis / Q000517:prevention & control*; D008609:Mental Status Schedule; D008875:Middle Aged; D015397:Program Evaluation; D013997:Time Factors; D014167:Transference, Psychology