Table 2.
Characteristics of cases and controls during the year after A/H1N1 2009 pandemic influenza
| n | Cases (n = 44) | n | Controls (n = 371) | p | |
|---|---|---|---|---|---|
| Change in FEV1, %, mean (SD) | |||||
| Month 1 | 12 | 8.3 (19.2) | 198 | −2.3 (8.4) | 0.08 |
| Month 3 | 17 | 0.6 (7.8) | 211 | −2.5 (8.7) | 0.14 |
| Month 12 | 28 | 1.2 (13.3) | 249 | −1.8 (11.0) | 0.67 |
| Change in FVC, %, mean (SD) | |||||
| Month 1 | 12 | 7.4 (18.1) | 198 | −3.9 (8.8) | 0.05 |
| Month 3 | 17 | 0.7 (8.7) | 212 | −2.5 (8.9) | 0.16 |
| Month 12 | 28 | 1.9 (12.7) | 252 | −2.6 (9.8) | 0.10 |
| Antibiotics, number of treatments, mean (SD) | |||||
| Oral | 44 | 2.8 (2.4) | 371 | 1.8 (2.1) | 0.002 |
| Intravenous | 44 | 0.6 (1.3) | 371 | 0.8 (1.54) | 0.42 |
| New bronchopulmonary colonization, n (%) | |||||
| Any germ | 44 | 13 (30) | 371 | 151 (41) | 0.60 |
| H. influenza | 44 | 1 (2) | 371 | 32 (8) | 0.13 |
| S. aureus | 44 | 3 (7) | 371 | 39 (11) | 0.42 |
| P. aeruginosa | 44 | 6 (14) | 371 | 36 (10) | 0.48 |
| B. cepacia | 44 | 0 | 371 | 5 (1) | 0.42 |
| A. fumigatus | 44 | 3 (7) | 371 | 39 (11) | 0.42 |
| Oxygen therapy, n (%) | 44 | 2 (5) | 371 | 30 (8) | 0.41 |
| Noninvasive ventilation, n (%) | 44 | 2 (5) | 371 | 12 (3) | 0.65 |
Both are compared to reference data and expressed as percent predicted values, based on age, gender, and height
FEV1 forced expiratory volume in one second, FVC forced vital capacity, SD standard deviation