Table 3.
Incidence of Influenza-like Illness, Laboratory-Confirmed Influenza, Influenza-Associated Hospitalizations, and Influenza Vaccine Coverage by Age Category, Peru Influenza Cohort Study, 2009–2015, All Sites Combineda
| Age Group, y | Influenza-like Illness per 1000 PYa | Influenza A and B per 1000 PYa | Influenza Vaccination per 100 PYb | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Overall | Overall | Medically Attended | Hospitalization | Overall | ||||||
| Incidence | (95% CI) | Incidence | (95% CI) | Incidence | (95% CI) | Incidence | (95% CI) | Rate | (95% CI) | |
| <2 | 1697 | (1626–1771) | 214 | (190–241) | 138 | (119–160) | 4.8 | (1.9–10) | 27 | (24–31) |
| 2–4 | 1225 | (1180–1271) | 256 | (236–277) | 131 | (117–146) | 2.2 | (.8–4.9) | 25 | (23–28) |
| 5–11 | 588 | (568–609) | 204 | (192–217) | 97 | (89–106) | 0.4 | (.1–1.2) | 9 | (8–10) |
| 12–17 | 318 | (302–335) | 112 | (103–123) | 34 | (29–40) | … | … | 5.5 | (4.7–6.5) |
| 18–49 | 186 | (180–193) | 51 | (48–55) | 19 | (17–21) | 0.4 | (.2–.8) | 6.4 | (6.0–6.9) |
| 50–64 | 190 | (177–204) | 51 | (45–59) | 21 | (17–26) | 0.8 | (.2–2.1) | 13 | (11–14) |
| ≥65 | 196 | (175–219) | 36 | (28–47) | 16 | (11–26) | 0.6 | (.03–3.1) | 26 | (23–29) |
| Overall | 384 | (378–391) | 100 | (97–104) | 44 | (42–46) | 0.7 | (.4–1.0) | 10.2 | (9.7–10.6) |
Person-years by age group: <2 years (1253), 2–4 years (2264), 5–11 years (5317), 12–17 years (4480), 18–49 years (16518), 50–64 years (3922), ≥65 years (1599).
Abbreviations: CI, confidence interval; PY, person-years.
aJune 2009 through July 2015 for Lima, Cuzco, and Puerto Maldonado and June 2009 through July 2014 for Tumbes.
bComplete years from 2011 to 2014 for Lima and Cuzco, 2011 to 2013 for Tumbes, and 2012 to 2014 for Puerto Maldonado.