Table 2.
Underlying medical conditions among patients with pandemic H1N1 infection according to age group
| Underlying condition | All patients | Patients <18 years old | Patients ≥18 years old |
|---|---|---|---|
| Any | 133/540 (24.6) | 29/225 (12.9) | 104/315 (32.9) |
| Pregnancya | 15/147 (15.2) | 0/77 (0.0) | 15/70 (27.3) |
| Asthma | 13/540 (2.4) | 1/225 (0.4) | 12/315 (3.8) |
| Chronic obstructive pulmonary disease | 25/540 (4.6) | 1/225 (0.4) | 24/315 (7.6) |
| Neuromuscular disorder | 3/540 (0.6) | 1/225 (0.4) | 2/315 (0.6) |
| Guillain–Barré syndrome | 0/540 (0) | 0/225 (0.0) | 0/315 (0.0) |
| Other neurological disease | 16/540 (3) | 7/225 (3.1) | 9/315 (2.9) |
| Obesity (BMI >35) | 18/540 (3.3) | 2/225 (0.9) | 16/315 (5.1) |
| Cardiovascular disease | 32/540 (5.9) | 2/225 (0.9) | 30/315 (9.5) |
| Diabetes mellitus | 23/540 (4.3) | 0/225 (0.0) | 23/315 (7.3) |
| Chronic liver disease | 10/540 (1.9) | 1/225 (0.4) | 9/315 (2.9) |
| Malignancy | 12/540 (2.2) | 1/225 (0.4) | 11/315 (3.5) |
| Haematological malignancy | 11/540 (2.0) | 5/225 (2.2) | 6/315 (1.9) |
| Immunosuppressive therapy | 23/540 (4.3) | 3/225 (1.3) | 20/315 (6.3) |
| Other | 39/540 (7.2) | 11/225 (4.9) | 28/315 (8.9) |
Data are presented as no./total no. (%)
aData input option on pregnancy was provided for female patients only