TABLE 1.
Influenza-attributable hospitalizations by age group—Chile, epidemiologic weeks 1–32, 2022.
| Age group, years | No. of patients (column %) | No. (%)c of SARI patients with respiratory specimens testedb | No. (%)d of influenza-positive specimensb | No. of P&I diagnoses attributable to influenzae | Populationf | Incidenceg (95% CI) | |
|---|---|---|---|---|---|---|---|
| With P&I clinical influenza discharge diagnosisa | With SARI, enrolled at sentinel sitesb | ||||||
| Total | 17 752 (100.0) | 6025 (100.0) | 5731 (95.1) | 301 (5.3) | 1002 | 19 828 563 | 5.1 (4.8–5.4) |
| <5 | 4911 (27.7) | 1927 (32.0) | 1880 (97.6) | 49 (2.6) | 132 | 1 177 286 | 11.2 (9.4–13.3) |
| 5–18 | 929 (5.2) | 424 (7.0) | 401 (94.6) | 31 (7.7) | 79 | 3 542 159 | 2.2 (1.8–2.8) |
| 19–64 | 3342 (18.8) | 1315 (21.8) | 1217 (92.5) | 99 (8.1) | 302 | 12 548 497 | 2.4 (2.2–2.7) |
| ≥65 | 8570 (48.3) | 2359 (39.2) | 2233 (94.7) | 122 (5.5) | 521 | 2 560 621 | 20.3 (18.7–22.2) |
Abbreviations: P&I, pneumonia and influenza; SARI, severe acute respiratory infection.
National-level hospital discharge data from Department of Statistics and Health Information, Chile’s Ministry of Health (Ministerio de Salud), with International Classification of Diseases, Tenth Revision hospital discharge codes J09–J18. https://deis.minsal.cl.
SARI sentinel surveillance implemented in nine tertiary care hospitals in northern, central, and southern Chile (Hospital de Antofagasta, Antofagasta; Hospital de Magallanes, Punta Arenas; Hospital de Puerto Montt, Puerto Montt; Hospital Ernesto Torres Galdámez, Iquique; Hospital Guillermo Gran Benavente, Concepción; Hospital Gustavo Fricke, Viña del Mar; Hospital Hernán Enriquez Aravena, Temuco; Hospital Militar, Santiago; and Hospital San Juan de Dios, Santiago).
Percentage of enrolled SARI patients.
Percentage of tested specimens from SARI patients.
Age-specific numbers in this column do not sum to total because of rounding when calculating influenza-attributable P&I diagnoses from P&I hospitalizations and SARI data.
Population projections and estimates calculated based on 2017 census data from the National Institute of Statistics, Santiago, Chile.
Cases per 100,000 person-years; incidence estimated using World Health Organization-recommended methods. https://apps.who.int/iris/handle/10665/178801.