Fig. 6From: Spatial analysis between particulate matter and emergency room visits for conjunctivitis and keratitisDose-response relationship between PM10 concentration and Visit Index of patients with keratitis from January, 2006 to December, 2014. Visit Index – number of patients with conjunctivitis or keratitis / number of all patients × 1000. *: Pearson’s correlation coefficient; **: statistical analysis by Pearson’s correlation analysisBack to article page