Figure 2.
Forest plot of point prevalence of PiB positive studies among the three entities encompassed by parkinsonism and cognitive impairment, specifically PDD, DLB and PD-MCI. The center point represents the estimated point prevalence for the respective study and the horizontal line, the 95% confidence interval for the respective study. The vertical broken line represents the pooled point prevalence and the boundaries of the hollow diamond represents the 95% CI of the pooled results. PDD = Parkinson disease with dementia, DLB = dementia with Lewy bodies, PD-MCI = Parkinson disease with mild cognitive impairment, n+ = number of subjects positive for amyloid, npat = total number of patients in each study.