Parameters | Apr 2011-Mar 2012 | Apr 2012-Mar 2013 | Apr 2013-Mar 2014 |
---|---|---|---|
Proportion of ILI in outpatient visits (%) | 26.1 | 24.8 | 23.2 |
Proportion of influenza in ILI (%) | 23.3 | 13.3 | 9.5 |
Total No. of outpatient visits at SCHa | 301,278 | 319,086 | 343,927 |
Estimated total no. of outpatient visits for ILI at SCHb | 72,244 (61,292–83,196) | 81,782 (71,199–92,365) | 85,676 (79,117–92,235) |
Estimated total no. of influenza-associated ILI at SCHc | 8,956 (5,657–13,018) | 7,172 (2,557–12,872) | 10,965 (5,579–17,132) |
Resident population of children <5 years in the catchment area of SCHd | 99,622 | 111,663 | 123,207 |
Proportion of ILI who sought care at SCH (%)e | 51.6 | 44.0 | 41.5 |
Incidence of influenza-associated ILI per 100 person-year | 17.4 (11.0–25.3) | 14.6 (5.2–26.2) | 21.4 (10.9–33.5) |