Figure 2. Incidence rate of neuromyelitis optica (NMO) in Sweden between 1987 and 2013.
Incidence rate per 1,000,000 individuals from 1987 to 2013 in Sweden. Blue dots represent the incidence rate per year and are connected with a red line for enhanced interpretation. The availability of MRI and aquaporin-4–immunoglobulin G (IgG) autoantibody analysis are reported in the figure. The black dotted line represents a linear regression model (incidence rate per 1,000,000 individuals = 0.03205 * year − 63.7) fitted to all data points. Green lines and green shaded area represent linear regression models with 95% confidence intervals fitted within periods 1987 to 2006 and 2007 to 2013, respectively. Values in plot are means with 95% confidence intervals for the time intervals 1987 to 2006 and 2007 to 2013.
