Table 2.
Distribution of FARI cases, seasonal influenza positives and 2009A/H1N1 positives by age groups from August 2009 to January 3 2010
| Age (years) | Total FARI cases | Influenza positive (%)* | Seasonal Flu no (%) | Pandemic H1N1 pos (%) | Odds ratio** | 95% CI | P value |
|---|---|---|---|---|---|---|---|
| 0–5 | 262 | 68(25·9) | 7 (2·6) | 61 (23·3) | – | 1·00 | – |
| >5–18 | 451 | 201(44·5) | 15 (3·3) | 186 (41·2) | 2·31 | 1·64–3·25 | 0·000 |
| >18–45 | 587 | 191(32·5) | 34 (5·8) | 157 (26·7) | 1·20 | 0·85–1·68 | 0·286 |
| >45–60 | 101 | 15 (14·9) | 7 (6·9) | 8 (7·9) | 0·38 | 0·17–0·86 | 0·020 |
| Total | 1401 | 475 | 63 | 412 | – |
*Patients positive for seasonal or pandemic H1N1 influenza infection confirmed by real‐time reverse transcription‐PCR.
**Odds ratio, 95% confidence interval, and P value were calculated for different age groups for pandemic 2009A/H1N1 in comparison with total febrile acute respiratory illness (FARI) cases.