Venous Thromboembolism in an Industrial North American City: Temporal Distribution and Association with Particulate Matter Air Pollution
Figure 7
Distribution of non-idiopathic venous thromboembolism (VTE).
(A) Monthly distribution (January = 1): dashed line indicates uniform distribution. Distribution differed from uniform (P<0.05 Kuiper’s test; P = 0.0004 Rayleigh test); mean (red arrow) = July 21st (shaded rectangle indicates the 95% confidence intervals; June 21st to August 20th). (B) Weekly distribution. Solid red line shows the periodic regression (P = 0.0004; R2 = 0.27); July 25th peak.