Table 3.
Discharge diagnoses of patients enrolled in Flu‐VE from May 2009 to March 2010 stratified by whether they were included to calculate total respiratory admissions from hospital discharge data system (HDDS)
| Any discharge diagnoses (ICD9‐CM codes) | A(H1N1)pdm09 (+) total = 51 n (%) | A(H1N1)pdm09 (−) total = 1129* n (%) |
|---|---|---|
| Discharge diagnoses included in current report | 50 (98·0) | 907 (80·3) |
| Pneumonia and influenza (480–487) | 38 (76·0) | 346 (38·1) |
| Bronchitis, emphysema, asthma (490–493) | 9 (18·0) | 307 (33·9) |
| Acute respiratory infections (460–466) | 1 (2·0) | 144 (15·9) |
| Dyspnea and respiratory abnormalities (786) | 0 (0·0) | 59 (6·5) |
| Fever (780·6) | 2 (4·0) | 48 (5·3) |
| Otitis media (381–382) | 0 (0·0) | 3 (0·3) |
| Discharge diagnoses not included | 1 (2·0) | 222 (19·7) |
| Pandemic (H1N1) 2009 (488) | 0 (0·0) | 1 (0·4) |
| Other respiratory (470–478, 494–519) | 0 (0·0) | 61 (27·5) |
| Circulatory (390–459) | 0 (0·0) | 53 (23·9) |
| Dehydration (276·51) | 1 (100·0) | 16 (7·2) |
| Other | 0 (0·0) | 91 (41·0) |
*One missing discharge diagnosis.