Figure 2From: Early co-occurrence of a neurologic-psychiatric disease pattern in Niemann-Pick type C disease: a retrospective Swiss cohort studyPresentation of clinical symptoms in terms of period prevalence rates in the study cohort. Age periods are represented in 5 to 20 years intervals on the x-axis. The period prevalence rates (%) were calculated for each clinical symptom by the number of affected patients in the respective age period divided by the total number of patients alive in this period. The total patient number is represented in brackets for each age period on the x-axis.Back to article page