Please assess the completion status of the following clinical trial:

Trial Title: A Study of the Effectiveness and Safety of Risperidone Versus Placebo in the Treatment of Behavioral Disturbances in Patients With Dementia

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: PHASE3
- Number of Arms: None

Eligibility Criteria:
Inclusion Criteria:~* Patients with a diagnosis of dementia of the Alzheimer's type, mixed dementia, or vascular dementia, as classified by the Diagnostic and Statistical Manual of Mental Diseases, 4th edition (DSM-IV)~* a score of 4 or more on the Functional Assessment Staging (FAST), a diagnostic tool for determining the stage of dementia~* a score of 23 or lower on the Mini-Mental State Examination (MMSE), a clinical measure used to evaluate cognition~* a BEHAVE-AD total score of at least 8, and a BEHAVE-AD global rating of at least 1~* residence in a psychiatric hospital, nursing home, or other long-term care facility for at least 1 month.~Exclusion Criteria:~* Patients with untreated, reversible causes of dementia~* with general medical or neurological conditions in which cognition is diminished (for example, untreated vitamin deficiency, severe liver or kidney malfunctions, brain tumor, etc.)~* with dementia related to HIV infection (human immunodeficiency virus)~* with a substance-induced persisting dementia~* with psychiatric disorders that could account for the behavior disturbances, such as schizophrenia.

- Gender: ALL
- Minimum Age: 55 Years
- Maximum Age: None
- Healthy Volunteers: f

Based on this trial design, predict the completion outcome and termination type (if applicable).