Table 5 Observed in-hospital mortality for admissions with primary diagnoses of influenza and ICD9 codes associated with influenza (numbers), by age group and season
Seasona | Influenza (ICD9 diagnosis 487) | All ICD9 associated with influenza | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
0–4 years | 5–14 years | 15–64 years |  ≥ 65 years | Total | 0–4 years | 5–14 years | 15–64 years |  ≥ 65 years | Total | |
2008/09 | 0 | 0 | 1 | 14 | 15 | 153 | 61 | 6,674 | 71,286 | 78,184 |
2009/10 | 0 | 3 | 48 | 25 | 76 | 125 | 57 | 6,896 | 72,227 | 79,319 |
2010/11 | 0 | 0 | 44 | 19 | 63 | 130 | 68 | 7,057 | 72,410 | 79,666 |
2011/12 | 0 | 0 | 3 | 13 | 16 | 127 | 52 | 6,756 | 75,940 | 82,875 |
2012/13 | 0 | 0 | 8 | 15 | 23 | 113 | 69 | 6,792 | 72,943 | 79,917 |
2013/14 | 0 | 0 | 2 | 5 | 7 | 120 | 64 | 6,408 | 72,655 | 79,247 |
2014/15 | 0 | 0 | 34 | 55 | 89 | 112 | 61 | 7,000 | 79,204 | 86,377 |
2015/16 | 0 | 0 | 12 | 13 | 25 | 114 | 71 | 6,720 | 77,371 | 84,276 |
2016/17 | 0 | 0 | 8 | 49 | 57 | 114 | 59 | 6,790 | 81,387 | 88,350 |
2017/18 | 0 | 1 | 17 | 47 | 65 | 127 | 81 | 6,845 | 78,976 | 86,029 |
2018/19 | 1 | 0 | 22 | 94 | 117 | 105 | 60 | 6,720 | 79,739 | 86,624 |
Total | 1 | 4 | 199 | 349 | 553 | 1,339 | 703 | 74,658 | 834,138 | 910,864 |
11-season mean | 0 | 0.4 | 17.7 | 25.5 | 50.3 | 123.5 | 64.3 | 6,793.8 | 75,439.9 | 82,805.8 |
3-season meanb | 0.3 | 0.3 | 15.7 | 63.3 | 79.7 | 115.3 | 66.7 | 6785 | 80034 | 87001 |