Sensitivity, specificity, positive predictive value and correlation coefficient of syndromes and ED visits according to age group, compared with ONAP.

Oscour® Network, Paris area, June 1st to August 31st 2006 PPV: Predictive Positive Value – CI: Confidence Interval – ONAP: On Alert Periods ED: Emergency Department Corr. coef.: correlation coefficient between the daily number of visits in ED and the maximum temperature recorded the same day. A: true positive day (number of days with a significant count of heat-related visits during the ONAP) D: true negative day (number of days with a non-significant count of heat-related visits during the OFAP)