Table 4. Percentage (number) of Secondary Influenza-Like Illness Among Household Contacts of Confirmed pH1N1 patients, by Household Contact Age and by Patient Age – Kibera and Lwak, Kenya, 2009–2010.
| Location | ||
| Age | Kibera | Lwak |
| Household contact | ||
| <5 | 6.1% (6/98) | 4.3% (21/486) |
| ≥5 | 22.5% (11/49) | 5.9% (18/303) |
| Relative Risk (95%CI a) | 1.4 (0.6–3.4) | 3.8 (1.9–7.5) |
| Patient | ||
| <5 | 5.0% (11/219) | 3.2% (2/62) |
| 5–15 | 3.3% (8/245) | 11.2% (23/206) |
| ≥15 | 6.7% (8/120) | 4.8% (4/84) |
| P-valueb | .33 | .06 |
a
CI = confidence interval.
b
We calculated the p-values using chi-square tests.