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Table 1 Total number of laboratory-confirmed influenza cases, hospitalizations and deaths captured in reportable disease and hospital data, Ontario, 2010–11 to 2013–14 influenza seasons

From: Getting a grippe on severity: a retrospective comparison of influenza-related hospitalizations and deaths captured in reportable disease and administrative data sources in Ontario, Canada

  Season
2010–11 2011–12 2012–13 2013–14 Totals
Reportable disease data
 Influenza cases 6048 3946 9782 9958 29,734
 Hospitalizations 2380 1243 3699 3738 11,060
 Deaths 202 79 292 261 834
Hospital data
 Hospitalizations (J09, J10) 1916 874 3099 2943 8832
 Hospitalizations (J09, J10, J11) 2778 1282 4079 3770 11,909
 Deaths (J09, J10) 126 54 200 193 573
 Deaths (J09, J10, J11) 185 61 253 220 719
  1. For reportable disease data, hospitalizations and deaths are counted using the episode date (the first of onset date, laboratory specimen collection date, or date reported to public health)
  2. For hospital data, hospitalizations and deaths are counted using the admission date (as an indicator for date of symptom onset)