Volume 20, Number 11—November 2014
Research
Death Patterns during the 1918 Influenza Pandemic in Chile
Figure 4

Figure 4. Relative risk for death over the baseline risk across provinces of Chile according to pandemic periods (July 1918–March 1919, June 1919–March 1920, and June 1921–December 1921). The relative risk for death is based on the ratio of excess deaths to baseline deaths, facilitating comparisons across provinces with different background risks for death. Solid line shows how relative risk varies with latitude by connecting observations for individual provinces; dashed line is a fitted linear trend.