Figure 1From: Saharan dust and association between particulate matter and case-specific mortality: a case-crossover analysis in Madrid (Spain) Percentage increases of case-specific mortality for an increase of 10 μ/m 3 of PM 10 , from lag 0 to lag 4, during Saharan dust (with circle) and non-dust days (back squares) with 95% confidence interval (vertical lines).Back to article page