Table 2.
Underlying medical conditions of deceased patients with a laboratory-confirmed influenza A(H1N1)2009 virus infection, the Netherlands 2009-2011 (n = 103)
| Pandemic season 2009-2010 N = 65 |
Influenza season 2010-2011 N = 38 |
||||
|---|---|---|---|---|---|
| Underlying medical condition* | n | (%) | n | (%) | p |
| None** | 10 | (15) | 10 | (26) | 0.3 |
| Respiratory disorder | 22 | (34) | 7 | (18) | 0.1 |
| Immunological disorder# | 23 | (35) | 5 | (13) | 0.02 |
| Neurological disorder | 9 | (14) | 4 | (10) | 0.9 |
| Intellectual disability## | 8 | (12) | 2 | (5) | 0.4 |
| Cardiovascular disorders | 5 | (8) | 12 | (32) | 0.005 |
| Kidney/liver disorders | 4 | (6) | 3 | (8) | 0.9 |
| Malignancies### | 2 | (3) | 3 | (8) | 0.5 |
| Metabolic disorders | 1 | (2) | 3 | (8) | 0.3 |
| Multiple underlying disorders | 17 | (26) | 10 | (26) | > 0.9 |
* Patients with multiple underlying disorders are counted for every underlying medical condition. For one patient underlying medical condition was unknown.
** In one patient a group A streptococcal infection was confirmed after autopsy.
# Including haematological malignancies.
## Including Down syndrome.
### Other non-specified malignancies.