Table 4.
Incidence of Complications Among Adults Aged 50–64 Years Hospitalized for Influenza, Toronto and Peel Region, 2010–2011 to 2016–2017
| Age Group, y | No. of Hospitalizations | No. (%) Experiencing Complication | ||||
|---|---|---|---|---|---|---|
| Anya | Cardiac Complicationb | Bacterial/Fungal Infectionc | Clostridioides difficile Colitis | Acute Renal Failure | ||
| 50–64 | 1125 | 128 (11) | 87 (8) | 85 (8) | 9 (1) | 29 (3) |
| 50–54 | 301 | 41 (14) | 21 (7) | 31 (10) | 0 (0) | 8 (3) |
| 55–59 | 364 | 45 (12) | 29 (8) | 29 (8) | 3 (1) | 13 (4) |
| 60–64 | 458 | 42 (9) | 37 (8) | 25 (5) | 6 (1) | 8 (2) |
Any complication occurring in the first 30 days of the hospitalization for influenza including cardiac complications, stroke, seizure, C. difficile colitis, acute renal failure, fracture, complicating bacterial/fungal infection.
Cardiac complications include: myocardial infarction, unstable angina, new arrhythmia, and episodes of atrial fibrillation.
Complicating infections included 1 case of endocarditis, 38 other bloodstream infections (14 Staphylococcus aureus, 7 Streptococcus pneumoniae, 6 Escherichia coli, 2 each Haemophilus influenzae, Pseudomonas aeruginosa, viridans group streptococci, and 1 each Streptococcus pyogenes, Klebsiella pneumoniae, Citrobacter koseri, Enterococcus faecalis, and Candida glabrata; 2 cases of empyema; and 44 cases of possible pneumonia (26 S aureus, 11 S pneumoniae, 4 H influenzae, 2 S pyogenes, and 1 Moraxella catarrhalis).