Figure 3
From: Potential influence of temperature and precipitation on preterm birth rate in Puerto Rico
Cumulative relative risk (RR) of PTB rate in respect to the mean values for average temperature (left panels) and the number of days in a month with temperature above 32 °C (DX90) subjected to time lags up to 1 months in Mayagüez, Ponce and San Juan. The horizontal broken line represents the reference line, i.e. RR = 1. The red broken and solid lines represent 0- and 1- month lags, respectively. The blue and dark-green lines along the shaded area represent 95% confidence interval values. The vertical broken lines represent mean values. The line and color notations are consistent for all the plots.
