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. 2020 Oct 21;20:1585. doi: 10.1186/s12889-020-09669-3

Fig. 3.

Fig. 3

The exposure-response curves of MSI, PM10, PM2.5 and the daily COVID-19 confirmed cases in 63 cities of China from January 01 to March 02, 2020. Note: (a) MSI; (b) PM10; (c) PM2.5. The X-axis is the values of MSI, PM10, PM2.5 in lag 07 or lag 014 days, Y-axis is the predicted log relative risk (RR), is shown by th color solid line, and the color dotted lines represent the 95% confidence interval (CI). The R2 represents the fitting effect, and the closer R2 is to 1, the better the fitting effect of the model