Table 3.
Comorbidities in Influenza-like Illness Cases and Asymptomatic Subgroup in Combination with Vaccination Status
| Comorbidity | 2011–2012 | 2012–2013 | |
|---|---|---|---|
| ILI Cases (n = 141) |
ILI Cases (n = 260) |
Asymptomatic Controls (n = 340) |
|
| Any chronic illness | 58 (41.1%) | 115 (44.2%) | 152 (44.7%) |
| Chronic respiratory conditions | 28 (19.9%) | 35 (13.5%) | 53 (15.6%) |
| Chronic heart failure | 19 (13.5%) | 41 (15.8%) | 44 (12.9%) |
| Autoimmunity | 7 (5%) | 21 (8.1%) | 33 (9.7%) |
| Diabetes mellitus | 13 (9.2%) | 31 (11.9%) | 32 (9.4%) |
| Malignancy | 9 (6.4%) | 20 (7.7%) | 33 (9.7%) |
| Vaccinated with any chronic illness | 53 (91.4%) | 129 (84.3%) | 129 (84.9%) |
| Vaccinated without any chronic illness | 62 (74.7%) | 78 (53.8%) | 132 (70.2%) |
| P valuea | .012 | .0001 | .001 |
aPearson χ2 test.