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Table 2 Characteristics of Ontario syndromic surveillance systems, overall (N = 26) and by data source

From: The use of syndromic surveillance for decision-making during the H1N1 pandemic: A qualitative study

System characteristic EDa SAa Othera Overall
  n % n % n % Total %
Operation Length
1 year or less 2 22 4 40 1 14 7 27
2-4 years 3 33 5 50 1 14 9 35
5 years or more 4 44 1 10 5 71 10 38
Syndrome Based 9 100 4 40 6 86 19 73
Frequency of Data Provision
Real-time 4 44 0 0 0 0 4 15
Daily 3 33 6 60 3 43 12 46
Weekly 2 22 4 40 4 57 10 38
Mechanism of Transferb
Automated 5 56 3 30 0 0 8 36
Manual 2 22 6 60 2 67 10 45
Both components 2 22 1 10 1 33 4 18
Frequency of Monitoringc
More than daily 2 25 0 0 0 0 2 9
Daily 4 50 6 60 2 50 12 55
Weekly 1 13 4 40 2 50 7 32
Other 1 13 0 0 0 0 1 5
Threshold or Algorithm Used in Analysis 6 67 9 90 2 29 17 65
Response Protocolc 2 25 5 50 1 25 8 36
  1. a ED, emergency department visits (n = 9); SA, school absenteeism (n = 10), and other includes daycare absenteeism (1), OTC pharmacy sales (1), sentinel ILI consultations (3), Telehealth (1) and workplace absenteeism (1).
  2. b4 missing responses for Other systems. c1 missing response for ED systems and 3 missing responses for Other systems.