Table 5.
Positive ratio of pandemic (H1N1) 2009 (pH1N1) ELISA based on age/sex group among influenza A patients
| Variable | No. (%) | 2009 Pandemic H1N1 | Seasonal influenza A | ||
|---|---|---|---|---|---|
| No. (%) | pH1N1 ELISA No. positive (%) | No. (%) | pH1N1 ELISA No. positive (%) | ||
| Total | 904 | 91 (10.1) | 84 (92.3) | 171 (18.9) | 0 |
| Age (years) | |||||
| 0–5 | 140 (15.5) | 3 (2.1) | 3 (100) | 27 (19.3) | 0 |
| 6–10 | 257 (28.4) | 25 (9.7)a | 23 (92.0) | 66 (25.7) | 0 |
| 11–15 | 259 (28.7) | 53 (20.5)b | 48 (90.6) | 33 (12.7) | 0 |
| 16–20 | 63 (7.0) | 6 (9.5)a | 6 (100) | 9 (14.3) | 0 |
| 21–30 | 96 (10.6) | 3 (3.1) | 3 (100) | 19 (19.8) | 0 |
| 31–40 | 38 (4.2) | 1 (2.6) | 1 (100) | 6 (15.8) | 0 |
| >40 | 51 (5.6) | 0 (0) | 0 | 11 (21.6) | 0 |
| p‐value | NA | <0.01 | 0.90 | 0.34 | NA |
| Sex | |||||
| Female | 408 (45.1) | 39 (9.6) | 34 (87.2) | 84 (20.6) | 0 |
| Male | 496 (58.2) | 52 (10.5) | 49 (94.2) | 87 (17.5) | 0 |
| p‐value | NA | 0.73 | 0.49 | 0.28 | NA |
NA, no application.
Two non‐influenza A cases (2/642) were positive in pH1N1 ELISA and were considered to be ‘false‐positive’. The two patients were both female; one was 8 years old and the other was 15 years old.
ap <0.05, bp <0.01.