Fig. 2From: Changes in the symptom frequency of rapid eye movement sleep behavior disorder according to disease durationRBD frequencies and the relation with the RBD duration. A scatter plot of RBD frequencies is shown. The x-axis denotes the duration of RBD in years. The y-axis denotes the frequency of RBD symptoms in NAR units. The blue spots represent RBD duration and RBD symptom frequency at the first visit to our sleep clinic. For better understanding of the RBD symptom frequency changes, trend is indicated with a red line, which was generated using the locally weighted scatterplot smoothing methodBack to article page