BACKGROUND: This study examines whether the association of diabetes with the rate of cognitive decline varies according to dementia severity. METHODS: Longitudinal study on subjects residing in nursing homes and assisted living (n = 342). The Mini Mental State Examination (MMSE) was used to measure the rate of cognitive decline in diabetic and nondiabetic subjects who were nondemented (Clinical Dementia Rating, CDR = 0; n = 125), questionably demented (CDR = 0.5; n = 58) or frankly demented (CDR > or =1; n = 89) at baseline. Diagnosis of diabetes was ascertained by review of medical records and history. RESULTS: Diabetes was associated with an increased rate of decline in the MMSE score of questionably demented subjects (p < 0.0001). In frankly demented subjects, diabetes tended to be associated with less cognitive decline (p = 0.04). Diabetes was not associated with the rate of MMSE decline in nondemented subjects (p = 0.89). CONCLUSION: In individuals with questionable dementia (CDR = 0.5), diabetes is associated with a faster rate of cognitive decline as measured by the MMSE, but not in nondemented (CDR = 0) or frankly demented (CDR > or =1) individuals. 2010 S. Karger AG, Basel.
BACKGROUND: This study examines whether the association of diabetes with the rate of cognitive decline varies according to dementia severity. METHODS: Longitudinal study on subjects residing in nursing homes and assisted living (n = 342). The Mini Mental State Examination (MMSE) was used to measure the rate of cognitive decline in diabetic and nondiabetic subjects who were nondemented (Clinical Dementia Rating, CDR = 0; n = 125), questionably demented (CDR = 0.5; n = 58) or frankly demented (CDR > or =1; n = 89) at baseline. Diagnosis of diabetes was ascertained by review of medical records and history. RESULTS:Diabetes was associated with an increased rate of decline in the MMSE score of questionably demented subjects (p < 0.0001). In frankly demented subjects, diabetes tended to be associated with less cognitive decline (p = 0.04). Diabetes was not associated with the rate of MMSE decline in nondemented subjects (p = 0.89). CONCLUSION: In individuals with questionable dementia (CDR = 0.5), diabetes is associated with a faster rate of cognitive decline as measured by the MMSE, but not in nondemented (CDR = 0) or frankly demented (CDR > or =1) individuals. 2010 S. Karger AG, Basel.
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