Table 2.
Incidence (per 100 000) of Invasive Group A Streptococcus Infection by Age, Gender, Body Mass Index Category, Underlying Conditions and Race: Active Bacterial Core Surveillance (2010–2012)
| Characteristic | Incidence for Whites (95% CI) | Incidence for Blacks (95% CI) | Incidence for Other Racea (95% CI) | Incidence for All Races (95% CI) |
|---|---|---|---|---|
| Age group in years | ||||
| 18–49 | 2.4 (2.2, 2.5) | 3.2 (2.8, 3.7) | 2.6 (2.2, 3.1) | 2.5 (2.4, 2.7) |
| 50–64 | 4.3 (3.9, 4.6) | 5.2 (4.4, 6.2) | 5.6 (4.5, 7.0) | 4.5 (4.2, 4.8) |
| ≥65 | 8.2 (7.7, 8.8) | 6.8 (5.4, 8.5) | 8.7 (6.8, 11.1) | 8.1 (7.6, 8.6) |
| Gender | ||||
| Female | 3.4 (3.2, 3.6) | 3.6 (3.1, 4.1) | 3.4 (2.9, 4.1) | 3.4 (3.2, 3.6) |
| Male | 4.5 (4.2, 4.7) | 4.6 (4.1, 5.3) | 4.4 (3.7, 5.1) | 4.5 (4.3, 4.7) |
| Body mass index category | ||||
| Normal weight (18.5–<25.0) | 3.4 (3.2, 3.7) | 4.7 (3.9, 5.7) | 2.1 (1.7, 2.7) | 3.4 (3.2, 3.6) |
| Underweight (<18.5) | 17.3 (14.1, 21.2) | 37.8 (26.4, 54.1) | 3.3 (1.6, 6.9) | 15.7 (13.2, 18.6) |
| Overweight (25.0–<30.0) | 3.1 (2.9, 3.4) | 2.9 (2.4, 3.6) | 3.6 (2.9, 4.6) | 3.1 (2.9, 3.4) |
| Obese grade 1–2 (30.0–<40.0) | 3.8 (3.5, 4.2) | 3.3 (2.7, 3.9) | 7.0 (5.6, 8.7) | 3.9 (3.6, 4.2) |
| Obese grade 3 (≥40) | 11.4 (10.1, 12.7) | 6.3 (4.9, 8.0) | 18.7 (13.7, 25.5) | 10.4 (9.4, 11.5) |
| Diabetes | ||||
| Absent | 3.1 (2.9, 3.2) | 3.3 (2.9, 3.6) | 2.5 (2.2, 2.9) | 3.0 (2.9, 3.2) |
| Present | 13.8 (12.8, 15.0) | 9.8 (8.2, 11.6) | 19.9 (16.5, 24.0) | 13.5 (12.7, 14.5) |
| Heart disease | ||||
| Absent | 3.6 (3.4, 3.8) | 3.7 (3.4, 4.1) | 3.5 (3.1, 4.0) | 3.6 (3.5, 3.8) |
| Present | 8.8 (7.9, 9.9) | 9.7 (7.5, 12.7) | 12.2 (8.7, 17.2) | 9.2 (8.3, 10.1) |
Abbreviation: CI, confidence interval.
a
Other race includes American Indian/Alaska Natives (6.0%) and Asian/Other Pacific Islanders (3.3%).