Table 3.
Adjusted Relative Risk of Invasive Group A Streptococcus Infection by Age, Gender, Body Mass Index Category, Underlying Conditions and Race: Active Bacterial Core Surveillance (2010–2012)
| Characteristic | Relative Riska for Whites (95% CI) | Relative Riska for Blacks (95% CI) | Relative Riska for Other Raceb (95% CI) |
|---|---|---|---|
| Age group | |||
| 18–49 years-old | reference | Reference | reference |
| 50–64 years-old | 1.52 (1.36,1.70) | 1.21 (.95,1.54) | 1.39 (1.02,1.89) |
| ≥65 years-old | 2.69 (2.41,3.01) | 1.29 (.95,1.75) | 1.86 (1.30,2.65) |
| Gender | |||
| Female | reference | reference | reference |
| Male | 1.41 (1.29,1.54) | 1.33 (1.10,1.62) | 1.35 (1.05,1.74) |
| Body mass index category | |||
| Normal weight (18.5–<25.0) | reference | reference | reference |
| Underweight (<18.5) | 4.82 (3.73,6.24) | 7.32 (4.67,11.5) | 1.57 (.64,3.86) |
| Overweight (25.0–<30.0) | 0.77 (.68,.88) | 0.60 (.45,.81) | 1.23 (.86,1.77) |
| Obese grade 1–2 (30.0–<40.0) | 1.02 (.90,1.16) | 0.65 (.49,.86) | 2.02 (1.41,2.89) |
| Obese grade 3 (≥40) | 3.47 (3.00,4.01) | 1.29 (.93,1.79) | 4.34 (2.76,6.81) |
| Diabetes | |||
| Absent | reference | reference | reference |
| Present | 3.37 (3.05,3.71) | 2.71 (2.15,3.42) | 5.08 (3.81,6.77) |
| Heart disease | |||
| Absent | reference | reference | reference |
| Present | 1.50 (1.32,1.71) | 1.99 (1.45,2.72) | 1.29 (.84,1.98) |
| Any other chronic conditionc | |||
| Absent | reference | reference | reference |
| Present | 1.05 (.96,1.14) | 0.91 (.74,1.1) | 0.66 (.5,.87) |
Abbreviations: BMI, body mass index; CI, confidence interval.
a
Relative risk is adjusted for all other characteristics listed.
b
Other race includes American Indian/Alaska Natives (6.0%) and Asian/Other Pacific Islanders (3.3%).
c
Other chronic conditions include asthma/chronic obstructive pulmonary disease, current smoking, cancer (excluding nonmelanoma skin cancer) chronic kidney disease and stroke, and exclude obesity (BMI ≥ 30), diabetes and heart disease.