Fig. 3

Geographical distribution and composition of six most common α-thalassemia and β-thalassemia mutations in regions of China. A illustrates the composition of six common α-thalassemia globin mutations across various provinces in China. B illustrates the composition of six common β-Thalassemia globin mutations across various provinces in China. Each vertical bar represents the proportional contribution of different thalassemia globin deletions and mutations within each region. C indicates to the overall proportion of the six most common α-globin gene mutations in China. D indicates to the overall proportion of the six most common β-Thalassemia gene mutations in China. The proportion was calculated by assigning weights according to the population size of each region. Data were extracted from included studies and plotted using ArcMap GIS software