Table 3.
Patient characteristic | OR (CI) of MRSA vs. MSSA among S. aureus isolates (n = 74,333)a |
---|---|
Sex | |
Female | 1.05 (1.02, 1.08) |
Male | Reference |
Age (yr) | |
Under 5 | 1.02 (0.96, 1.09) |
5 to <18 | 0.84 (0.79, 0.88) |
18 to <50 | 1.20 (1.15, 1.26) |
50 to <65 | 0.97 (0.92, 1.02) |
65+ | Reference |
Race/ethnicity | |
Asian | 0.69 (0.65, 0.73) |
African-American | 1.73 (1.64, 1.82) |
Hispanic | 1.11 (1.06, 1.16) |
Other/unknown | 1.10 (1.05, 1.15) |
White | Reference |
Census block income quintile | |
Unknown | 1.38 (1.29, 1.47) |
1st (lowest income) | 1.54 (1.46, 1.62) |
2nd | 1.39 (1.32, 1.46) |
3rd | 1.25 (1.19, 1.31) |
4th | 1.14 (1.09, 1.20) |
5th (highest income) | Reference |
Onset type | |
Health care associated, hospital onset | 1.58 (1.46, 1.70) |
Health care associated, community onset | 0.96 (0.92, 1.00) |
Community associated | Reference |
Odds ratios were estimated using a multivariate logistic regression. The analytic data set had a record for each S. aureus isolate. The dependent variable was whether or not the isolate was methicillin resistant, and the independent variables were gender, age, race/ethnicity, income quintile based on census block, and onset type. Reference, reference group for other odds ratios within a characteristic.