Table 1. Underlying medical conditions in patients with influenza A(H1N1) and A(H3N2) virus.
| Comorbidities | Influenza A(H1N1) (n = 146) | Influenza A(H3N2) (n = 88) | P |
|---|---|---|---|
| Body mass index (>30) | 26 (17.8%) | 11 (12.5%) | 0.290 |
| Diabetes | 29 (19.8%) | 20 (22.7%) | 0.602 |
| Chronic liver disease | 8 (5.5%) | 3 (3.4%) | 0.469 |
| Chronic renal failure | 22 (15.1%) | 13 (14.8%) | 0.951 |
| Chronic heart disease | 34 (23.3%) | 31 (35.2%) | 0.048 |
| Cerebrovascular disease | 12 (8.2%) | 19 (21.6%) | 0.003 |
| COPD | 31 (21.2%) | 12 (13.6%) | 0.146 |
| Asthma | 12 (8.2%) | 9 (10.2%) | 0.603 |
| Neoplasia | 26 (17.8%) | 8 (9.1%) | 0.067 |
| Bronchiectasis | 4 (2.7%) | 2 (2.3%) | 0.827 |
| Pregnancy | 17 (11.6%) | 5 (5.7%) | 0.130 |
| Immunosuppression (1) | 37 (25.3%) | 9 (10.2%) | 0.005 |
| ≥ 3 Comorbidities | 38 (26.0%) | 20 (22.7%) | 0.496 |
| No comorbidities | 36 (24.6%) | 19 (21.6%) | 0.592 |
(1) Immunosuppression: HIV, active neoplasia, active chemotherapy, transplant, chronic treatment with oral corticosteroids.