Effects of Diffused Ylang-Ylang Essential Oil Amongst Older Persons With Dementia

Inclusion Criteria: * Persons who have been diagnosed with dementia by their physicians and in nursing homes in Selangor, Malaysia. * Persons with dementia who have at least one symptom of BPSD Exclusion Criteria: * Persons with dementia with a comorbid respiratory problem like asthma or chronic obstructive pulmonary disease * Persons with dementia who are allergic to fragrance/perfumes * Persons with dementia who had a change in their psychotropic or dementia medications in the 30 days before commencement of the study, namely: acetylcholinesterase inhibitors N-methyl-D-aspartate (NMDA)-receptor antagonist (memantine), antipsychotics, antidepressants, sedatives, or medications with anticholinergic properties * Persons who have been diagnosed with schizophrenia or mental retardation * Persons who have no documented behavioral history in the previous three month * Persons who are currently hospitalized * Persons with dementia who are unwilling to participate or disallowed by caregivers/family members