An observational study in Geriatric Disorders, sponsored by University Hospital, Angers. Completed at 1 site in France. Open to participants aged 75 Years and older. Per ClinicalTrials.gov, last updated 2017-05-01.
Sponsored by University Hospital, Angers · Observational
The primary objective of this study is to determine whether geriatric inpatients with severe behavioral disorders exhibit higher serum ionized calcium concentration than geriatric inpatients without behavioral disorders, but no difference in serum calcium or corrected calcium concentrations. The secondary objective of this study is to determine whether the serum ionized calcium concentration is associated with behavioral and cognitive performance among geriatric inpatients.
Growing attention is paid to the neurological effects of calcium. While calcium is necessary for neuronal physiology, it appears that high serum calcium concentrations may be toxic to neurons. An analysis of the Rotterdam Study showed that, among older adults, higher concentrations of calcium were associated with greater cognitive disorders and faster cognitive decline. Similarly, delirium and behavioural disorders are reported in older adults with hypercalcemia. In contrast, other studies failed to find any association. For example, in France, an analysis of the EPIDOS study found no association between calcium concentration and cognitive performance. Thus, further studies remain necessary to make firmer conclusions about this link. In particular, it is interesting to note that all previous studies have used the serum concentrations of calcium or corrected calcium, but not yet ionized calcium. This assay is yet more reproducible, more sensitive and more correlated with clinical events. We propose that the non-use of ionized calcium assay may explain, at least in part, the discrepancies between previous studies.
University Hospital, Angers is the lead sponsor of 464 studies on the registry; 116 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients are recruited in geriatric acute care.
Cases :
Controls :
Exclusion Criteria:
Inpatient with severe behavioural disorders
Inpatients without severe behavioural disorder and taking no antipsychotics
Comparison of serum ionized calcium concentrations between cases and paired controls.
This measurement is assessed by a blood test.
Time frame: This outcome is assessed at baseline.
Comparison of serum corrected calcium concentration between cases and paired controls.
This measurement is assessed by a blood test.
Time frame: This outcome is assessed at baseline.
Comparison of the severity of behavioural disorders between cases and paired controls.
The severity of behavioural disorders is assessed by a standardized scale (Frontotemporal Behavioural Rating Scale (FBRS), Lebert F. et Pasquier F., 1998)
Time frame: This outcome is assessed at baseline.
Comparison of cognitive performance between cases and paired controls.
Cognitive performance is assessed by the Mini-Mental State Examination (MMSE) score.
Time frame: This outcome is assessed at baseline.
Plan to share: No
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This study is completed, as verified in Sep 2016. You cannot join it, but the record below documents what was studied.
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University Hospital, Angers