Average Annual Incidence, Average Annual Percentage Change in Incidence, and Case-fatality Ratios for Invasive Haemophilus influenzae Serotype a Disease, by Age Group—United States and Alaska, 2008–2017
| Age (Years) . | United States . | Alaska . | ||||
|---|---|---|---|---|---|---|
| . | Estimated Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . | Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . |
| <1 | 1.60 (1.46–1.75) | 14.6 (11.4–17.8) | 6.2 | 24.73 (16.30–36.00) | 1.2 (−11.2 to 15.3) | 7.4 |
| 1–4 | .41 (.36–.45) | 5.6 (2.8–8.5) | 1.1 | 4.14 (2.45–6.54) | 17.7 (−.8 to 39.5) | 11.1 |
| 5–17 | .03 (.03–.03) | 7.8 (2.0–14.0) | 5.0 | .07 (.00–.41) | −1.0 (−29.8 to 39.5)a | 0.0 |
| 18–34 | .02 (.01–.02) | 16.4 (8.3–25.1) | 14.3 | .00 (.00–.00) | 0.0 | |
| 35–49 | .05 (.04–.05) | 4.0 (−.1 to 8.3) | 11.1 | .07 (.00–.41) | 0.0 | |
| 50–64 | .10 (.10–.11) | 23.4 (19.5–27.3) | 7.9 | .07 (.00–.41) | 0.0 | |
| ≥65 | .14 (.14–.15) | 7.9 (5.0–10.9) | 15.1 | .15 (.00–.85) | 100.0 | |
| Total | .10 (.10–.10) | 11.1 (9.7–12.6) | 7.8 | .68 (.50–.89) | 4.9 (−5.0 to 15.8) | 10.2 |
| Age (Years) . | United States . | Alaska . | ||||
|---|---|---|---|---|---|---|
| . | Estimated Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . | Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . |
| <1 | 1.60 (1.46–1.75) | 14.6 (11.4–17.8) | 6.2 | 24.73 (16.30–36.00) | 1.2 (−11.2 to 15.3) | 7.4 |
| 1–4 | .41 (.36–.45) | 5.6 (2.8–8.5) | 1.1 | 4.14 (2.45–6.54) | 17.7 (−.8 to 39.5) | 11.1 |
| 5–17 | .03 (.03–.03) | 7.8 (2.0–14.0) | 5.0 | .07 (.00–.41) | −1.0 (−29.8 to 39.5)a | 0.0 |
| 18–34 | .02 (.01–.02) | 16.4 (8.3–25.1) | 14.3 | .00 (.00–.00) | 0.0 | |
| 35–49 | .05 (.04–.05) | 4.0 (−.1 to 8.3) | 11.1 | .07 (.00–.41) | 0.0 | |
| 50–64 | .10 (.10–.11) | 23.4 (19.5–27.3) | 7.9 | .07 (.00–.41) | 0.0 | |
| ≥65 | .14 (.14–.15) | 7.9 (5.0–10.9) | 15.1 | .15 (.00–.85) | 100.0 | |
| Total | .10 (.10–.10) | 11.1 (9.7–12.6) | 7.8 | .68 (.50–.89) | 4.9 (−5.0 to 15.8) | 10.2 |
Note: Incidence is presented in cases per 100 000 persons per year.
Abbreviations: CFR, case-fatality ratio; CI, confidence interval.
aDue to small numbers, age groups were combined. This average annual percentage change in incidence is for persons aged ≥5 years in Alaska.
Average Annual Incidence, Average Annual Percentage Change in Incidence, and Case-fatality Ratios for Invasive Haemophilus influenzae Serotype a Disease, by Age Group—United States and Alaska, 2008–2017
| Age (Years) . | United States . | Alaska . | ||||
|---|---|---|---|---|---|---|
| . | Estimated Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . | Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . |
| <1 | 1.60 (1.46–1.75) | 14.6 (11.4–17.8) | 6.2 | 24.73 (16.30–36.00) | 1.2 (−11.2 to 15.3) | 7.4 |
| 1–4 | .41 (.36–.45) | 5.6 (2.8–8.5) | 1.1 | 4.14 (2.45–6.54) | 17.7 (−.8 to 39.5) | 11.1 |
| 5–17 | .03 (.03–.03) | 7.8 (2.0–14.0) | 5.0 | .07 (.00–.41) | −1.0 (−29.8 to 39.5)a | 0.0 |
| 18–34 | .02 (.01–.02) | 16.4 (8.3–25.1) | 14.3 | .00 (.00–.00) | 0.0 | |
| 35–49 | .05 (.04–.05) | 4.0 (−.1 to 8.3) | 11.1 | .07 (.00–.41) | 0.0 | |
| 50–64 | .10 (.10–.11) | 23.4 (19.5–27.3) | 7.9 | .07 (.00–.41) | 0.0 | |
| ≥65 | .14 (.14–.15) | 7.9 (5.0–10.9) | 15.1 | .15 (.00–.85) | 100.0 | |
| Total | .10 (.10–.10) | 11.1 (9.7–12.6) | 7.8 | .68 (.50–.89) | 4.9 (−5.0 to 15.8) | 10.2 |
| Age (Years) . | United States . | Alaska . | ||||
|---|---|---|---|---|---|---|
| . | Estimated Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . | Incidence (95% CI) . | Average Annual Percentage Change in Incidence (95% CI) . | CFR, % . |
| <1 | 1.60 (1.46–1.75) | 14.6 (11.4–17.8) | 6.2 | 24.73 (16.30–36.00) | 1.2 (−11.2 to 15.3) | 7.4 |
| 1–4 | .41 (.36–.45) | 5.6 (2.8–8.5) | 1.1 | 4.14 (2.45–6.54) | 17.7 (−.8 to 39.5) | 11.1 |
| 5–17 | .03 (.03–.03) | 7.8 (2.0–14.0) | 5.0 | .07 (.00–.41) | −1.0 (−29.8 to 39.5)a | 0.0 |
| 18–34 | .02 (.01–.02) | 16.4 (8.3–25.1) | 14.3 | .00 (.00–.00) | 0.0 | |
| 35–49 | .05 (.04–.05) | 4.0 (−.1 to 8.3) | 11.1 | .07 (.00–.41) | 0.0 | |
| 50–64 | .10 (.10–.11) | 23.4 (19.5–27.3) | 7.9 | .07 (.00–.41) | 0.0 | |
| ≥65 | .14 (.14–.15) | 7.9 (5.0–10.9) | 15.1 | .15 (.00–.85) | 100.0 | |
| Total | .10 (.10–.10) | 11.1 (9.7–12.6) | 7.8 | .68 (.50–.89) | 4.9 (−5.0 to 15.8) | 10.2 |
Note: Incidence is presented in cases per 100 000 persons per year.
Abbreviations: CFR, case-fatality ratio; CI, confidence interval.
aDue to small numbers, age groups were combined. This average annual percentage change in incidence is for persons aged ≥5 years in Alaska.
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