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Table 4 Heat wave disease syndromes (visits/proportion) by age group and period, 49 ED, France summer 2006

From: Syndromic surveillance and heat wave morbidity: a pilot study based on emergency departments in France

  Less than 75 years old At least 75 years old
  ONAP1   OFAP2   ONAP1   OFAP2  
  HWDS3 ED Visits HWDS3 ED Visits as a proportion of total ED Visits HWDS3 ED Visits HWDS3 ED Visits as a proportion of total ED Visits HWDS3 ED Visits HWDS3 ED Visits as a proportion of total ED Visits HWDS3 ED Visits HWDS3 ED Visits as a proportion of total ED Visits
Malaise 1,808 2.46%*** 5,554 1.85% 661 7.70%*** 2,062 6.24%
Hyperthermia 98 0.13%* 115 0.04% 31 0.35%*** 10 0.03%
Hyponatremia 59 0.08% (NS) 99 0.03% 139 1.62%*** 187 0.57%
Dehydration 67 0.09% (NS) 112 0.04% 161 1.88%*** 207 0.63%
Renal Colic 684 0.94%* 2,527 0.84% 19 0.22%
(NS)
58 0.17%
Renal failure 59 0.08% (NS) 205 0.07% 57 0.66%* 170 0.51%
Total HWDS 3 2,775 3.78%*** 8,612 2.87% 1,068 12.43%*** 2,694 8.15%
  1. * p < 0.05 ** p < 0.01 *** p < 0.001.
  2. 1: ONAP, 'On Alert' Period; 2: OFAP, 'Off Alert' Period; 3: HWDS, Heat Wave Disease Syndromes