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BACKGROUND Observational epidemiological studies have shown a positive association between hypertension and risk of incident dementia; however, the effects of antihypertensive therapy on cognitive function in controlled trials have been conflicting, and meta-analyses of the trials have not provided clear evidence of whether antihypertensive treatment(More)
— The observer design problem for linear discrete multiple delays rectangular singular systems with unknown inputs is discussed. Under a series of equivalent transformation , the problem is transformed into the observer design problem for standard state-space linear discrete systems with multiple delays. In terms of LMI, the sufficient condition for the(More)
— The stochastic stability and robust stochastic stabilization for time-delay discrete Markovian jump singular systems with parameter uncertainties are discussed. Based on stochastic Lyapunov functional, a delay-dependent linear matrix inequalities (LMIs) condition for the time-delay discrete Markovian jump singular systems to be regular, causal and(More)
This paper discusses robust stochastic stability and stabilization of time-delay discrete Markovian jump singular systems with parameter uncertainties. Based on the restricted system equivalent (RES) transformation, a delay-dependent linear matrix inequalities condition for time-delay discrete-time Markovian jump singular systems to be regular, causal and(More)
OBJECTIVE The purpose of this study is to examine the association of the clock drawing test (CDT) with incident dementia, cardiovascular events and mortality in very elderly hypertensive patients. METHOD All participants were hypertensive and aged 80 years and over. The CDT was administered at baseline and annually thereafter. Data on incident(More)