Table 1 Comparison of baseline characteristics between 2009 pandemic and post-pandemic Influenza (H1N1)v infection period
From: Pandemic and post-pandemic Influenza A (H1N1) infection in critically ill patients
Variables | Pandemic period N = 648 | Post-pandemic period N = 349 | P-value |
|---|---|---|---|
Age. years | |||
Mean (SD) | 44.7 +/- 14.6 | 49.9 +/- 14.2 | <0.001 |
Median (IQR) | 34 (44 to 54) | 40 (51 to 59) | <0.001 |
Male (sex) n (%) | 374 (57.7) | 237 (67.9) | 0.01 |
COPD n (%) | 108 (16.7) | 78 (22.3) | 0.02 |
Asthma n (%) | 81 (12.5) | 28 (8.0) | 0.03 |
Chronic heart failure n (%) | 47 (7.3) | 36 (10.3) | 0.09 |
Chronic renal disease n (%) | 33 (5.1) | 30 (8.6) | 0.03 |
Diabetes mellitus n (%) | 82 (12.7) | 55 (15.8) | 0.1 |
Pregnancy n (%) | 31 (4.8) | 13 (3.7) | 0.4 |
Obesity n (%) | 138 (21.3) | 64 (18.3) | 0.2 |
Autoimmune disorders n (%) | 18 (3.4) | 2(1.8) | 0.5 |
Hematological disease n (%) | 40(6.2) | 37 (10.6) | 0.01 |
Neuromuscular disease n (%) | 24 (3.7) | 4 (1.1) | 0.02 |
HIV infection n (%) | 13 (2.0) | 13 (3.7) | 0.1 |