Scatter plots of pneumonia and influenza mortality episode duration and total mortality vs. dew point temperature.

<p>a) (left) Total episode duration (days) <i>vs.</i> mean episode dew point temperature (°C) (r = −0.61). b) (right) Total episode mortality (in z-score units) <i>vs.</i> mean episode dew point temperature (°C) (r = −0.56). The regression line shown in both graphs is for the least squares linear regression of the full data set. Both of these relationships were determined to have statistically significant slopes based upon 10,000 bootstrapped samples.