Table 1.
Influenza positivity among cases enrolled as hospitalized cases (IPD) or outpatient (OPD) at All India Institute of Medical Sciences (AIIMS)
| Age (years) | Total febrile acute respiratory illness cases | AIIMS Hospitalized IPD | AIIMS OPD | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Total no. | Influenza pos (%) | Seasonal Flu no (%) | Pandemic H1N1 pos (%) | Total no. | Influenza pos (%) | Seasonal pos (%) | Pandemic H1N1 pos (%) | ||
| 0–5 | 262 | 65 | 17 (26·1) | 4 (6·1) | 13 (20·0) | 197 | 51 (25·8) | 3 (1·5) | 48 (24·3) |
| >5–18 | 451 | 71 | 18 (25·3) | 2 (2·8) | 16 (22·5) | 380 | 183 (48·1) | 13 (3·4) | 170 (44·7) |
| >18–45 | 587 | 81 | 26 (32·1) | 6 (7·4) | 20 (24·7) | 506 | 165 (32·6) | 28 (5·5) | 137 (27·1) |
| >45 | 101 | 29 | 4 (13·8) | 1 (3·4) | 3 (10·3) | 72 | 11 (15·3) | 6 (8·3) | 5 (6·9) |
| Total | 1401 | 246 | 65 (26·4)* | 13 (5·3) | 52 (21·1)** | 1155 | 410 (35·5)* | 50 (4·3) | 360 (31·2)** |
*P value for total influenza positivity between inpatient department (IPD) verses outpatient department (OPD) cases P < 0·01 (OR = 1·53 CI = 1·12–2·12).
**P value for total 2009A/ H1N1 positivity between OPD verses IPD cases P < 0·01 (OR = 1·69; CI = 1·20–2·40).