Table 2.
Early care‐seeking behavior by influenza type and season
| Season | Predominant influenza A subtype | Influenza A | Influenza B | Crude odds ratio (95% CI) | Adjusted* odds ratio (95% CI) |
|---|---|---|---|---|---|
| No. received care <3 days after illness onset/total cases (%) | |||||
| 2004–2005 | H3N2 | 79/150 (53%) | 5/14 (36%) | 2·0 (0·6, 6·3) | 1·8 (0·6, 6·0) |
| 2005–2006 | H3N2 | 12/20 (60%) | 10/29 (34%) | 2·9 (0·9, 9·3) | 5·3 (1·04, 26·9) |
| 2006–2007 | H1N1 | 42/93 (45%) | 3/7 (43%) | 1·1 (0·2, 5·2) | 1·2 (0·2, 6·6) |
| 2007–2008 | H3N2 | 316/622** (51%) | 88/232 (38%) | 1·7 (1·2, 2·3) | 1·7 (1·2, 2·3) |
Partially immunized children were excluded.
*Adjusted for age, gender, high‐risk medical condition status, and vaccination status.
**Illness onset date unavailable for one patient.