Please select the eligibility criteria that correspond to the clinical trial below.
Title: A Randomized, Double-Blind, Placebo-Controlled Evaluation of the Safety and Efficacy of Memantine in Patients With Moderate-to-Severe Dementia of the Alzheimer's Type
Brief Summary: The objective of this study is to evaluate the safety, tolerability, and efficacy of memantine compared to placebo in outpatients diagnosed with moderate-to-severe dementia of the Alzheimer's type on a concurrent acetylcholinesterase inhibitor (AChEI).


Options:
A: Inclusion Criteria:

1. Age 65 years or older
2. Current hospitalization of at least 3 calendar days (modified ITT)
3. Diagnosis of one or more of the following:

   * End-stage renal disease (ESRD) on dialysis
   * Chronic obstructive pulmonary disease (COPD) with home oxygen dependence or 2 or more hospitalizations in the past 12 months
   * Dementia admitted from a long-term care facility or prior placement of a surgical feeding tube or 2 or more additional hospitalizations in the past 12 months

Exclusion criteria:

1. Patients younger than 65 years old will not receive the intervention
B: Inclusion Criteria:

* dementia diagnosis
* advanced cognitive impairment
* feeding problem
* age \>= 65
* surrogate decision maker

Exclusion Criteria:

* feeding tube decision made
* hospice
* BMI \> 26
* major psychosis or developmental delay
C: Inclusion Criteria:

* Ambulatory patients aged \>/= 50 years
* Diagnostic evidence of probable Alzheimer's disease consistent with criteria from the National Institute of Neurological and Communicative Disorders and Stroke-Alzheimer's Disease and Related Disorders Association (NINCDS-ADRDA) and the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR)
* Confirmatory magnetic resonance imaging (MRI) or computed tomographic (CT) scan within the prior 12 months.
* Mini-Mental State Examination (MMSE) scores \>/= 3 and \</= 14 at Screening (Visit 1) and Baseline (Visit 2)
* Ongoing daily acetylcholinesterase inhibitor (AChEI) therapy at a stable dose for at least 3 months prior to Screening (Visit 1). It is preferred that patients continue to receive the same AChEI therapy for the duration of the study.

Exclusion Criteria:

* Patients with a modified Hachinski Ischemia Score greater than 4 at Screening.
* Patients who have taken memantine within one month of Screening (Visit 1)
* Patients who have a known hypersensitivity to memantine, neramexane, rimantadine, or amantadine.
* Patients whose AChEI therapy is likely to be interrupted or discontinued during the course of the study.
* Patients who are receiving therapy with more than one AChEI.
* Patients with computed tomography (CT) or magnetic resonance imaging (MRI) evidence of hydrocephalus, stroke, a space-occupying lesion, cerebral infection, or any clinically significant central nervous system disease other than Alzheimer's disease.
* Patients with a DSM-IV Axis I disorder other than Alzheimer's disease, including amnestic disorders, schizophrenia or schizoaffective disorder, bipolar disorder, current major depressive episode, psychosis, panic, or post-traumatic stress disorder.
* Patients who, in the clinician's judgement, are likely to be placed in a nursing home within the next 6 months.
* Patients who had evidence of other neurological disorders that included, but were not limited to, stroke, Parkinson's disease, seizure disorder, or head injury with loss of consciousness within the prior 5 years
* Patients who had dementia that was complicated by other organic disease
* Patients who had dementia complicated by the presence of predominant delusions
D: Inclusion Criteria:

* Diagnosis of Alzheimer's type dementia, rated as severe
* progressive worsening of memory and other cognitive functions
* brain imaging (CTor MRI scan) within last 3 years
* ability to be mobile (aided or unaided) with sufficient vision and hearing to comply with testing.

Exclusion Criteria:

* Dementia caused by cerebrovascular disease
* disturbances of consciousness, delirium, psychosis
* severe aphasia
* or major sensorimotor impairment
* cognitive impairment due to acute cerebral trauma, hypoxic cerebral damage, vitamin deficiency, infections, primary of metastatic cerebral neoplasia, endocrine or metabolic disease or mental retardation, pregnant or nursing women or those without adequate contraception.

Answer: C