Trots att effekt kunde visas vid behandling av hela studiepopulationen, finns data som visade på effektivare behandling hos en subgrupp jämförd med placebo mot måttligt svår demens vid Parkinsons sjukdom. ###>Although a treatment effect was demonstrated in the overall study population, the data suggested that a larger treatment effect relative to placebo was seen in the subgroup of patients with moderate dementia associated with Parkinson’ s disease.