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. 2016 Jan 16;13(1):132. doi: 10.3390/ijerph13010132

Table 1.

Syndromic surveillance systems used in the study and the syndromic indicators included within the analysis.

Surveillance System Approximate Population Coverage (% of England Population) Syndromic Indicator
Cardiovascular Respiratory Others
GP in hours (GPIH) 35 million (64%) Myocardial infarction * Asthma, wheeze Cerebrovascular accident *
GP out of hours (GPOOH) 33 million (60%) N/A Asthma, Asthma/Wheeze/Difficulty Breathing Fever, rash, cerebrovascular accident
Emergency department (EDSSS) 35 sentinel EDs Myocardial ischaemia Asthma, Asthma/Wheeze/Difficulty Breathing Cerebrovascular accident

* these indicators are not routinely used in the daily syndromic surveillance and are derived from a subset of the GPIH system with a denominator of approximately 5 million patients. Population coverage not possible due to difficulties in calculating denominator population. N/A no indicators available.