Fig. 4From: Temporal cross-correlations between air pollutants and outpatient visits for respiratory and circulatory system diseases in Fuzhou, ChinaERs of outpatient visits for total respiratory, lower respiratory, upper respiratory and circulatory diseases in the different periods. Cold period (a), warm period (b) and the Wilcoxon paired test of ERs between the upper respiratory and lower respiratory periods in different periods (c). (p > 0.05: ‘ns’; 0.01 < p < 0.05: ‘*’; 0.001 < p < 0.01: ‘**’; 0.0001 < p < 0.001:‘***’; p < 0.0001: ‘****’)Back to article page