MRSA compared with MSSA infections (skin and soft tissue infection only) by paediatric and adult incidence for bivariate and multivariable models
| Individual level | Paediatric skin and soft tissue infections | Adult skin and soft tissue infections | ||||||
| Crude OR (95% CI) | P value | Adjusted OR (95% CI) | P value | Crude OR (95% CI) | P value | Adjusted OR (95% CI) | P value | |
| Individual level | ||||||||
| Age* | ||||||||
| Level 1 | Referent | Referent | Referent | Referent | ||||
| Level 2 | 1.05 (0.75 to 1.48) | 0.78 | 1.01 (0.71 to 1.42) | 0.97 | 1.21 (0.98 to 1.49) | 0.08 | 1.21 (0.98 to 1.50) | 0.08 |
| Level 3 | 0.55 (0.41 to 0.73) | <0.001 | 0.55 (0.41 to 0.74) | <0.001 | 0.98 (0.79 to 1.20) | 0.81 | 0.98 (0.79 to 1.20) | 0.82 |
| Level 4 | 0.63 (0.47 to 0.85) | 0.002 | 0.64 (0.47 to 0.87) | 0.003 | 1.25 (1.00 to 1.55) | 0.05 | 1.27 (1.02 to 1.58) | 0.04 |
| Gender | ||||||||
| Female | Referent | Referent | Referent | Referent | ||||
| Male | 0.87 (0.70 to 1.08) | 0.21 | 0.96 (0.86 to 1.07) | 0.45 | 1.00 (0.90 to 1.10) | 0.91 | 1.01 (0.96 to 1.06) | 0.68 |
| Race | ||||||||
| White | Referent | Referent | Referent | Referent | ||||
| Black | 1.43 (1.16 to 1.76) | 0.001 | 1.35 (1.09 to 1.67) | 0.007 | 1.24 (1.08 to 1.42) | 0.003 | 1.24 (1.08 to 1.43) | 0.002 |
| Other | 0.72 (0.48 to 1.06) | 0.09 | 0.69 (0.46 to 1.02) | 0.06 | 0.74 (0.58 to 0.95) | 0.02 | 0.73 (0.57 to 0.94) | 0.02 |
| Ethnicity | ||||||||
| Non-Hispanic | Referent | Referent | Referent | Referent | ||||
| Hispanic | 0.76 (0.65 to 0.89) | 0.001 | 0.80 (0.67 to 0.95) | 0.01 | 0.88 (0.78 to 1.00) | 0.04 | 0.90 (0.80 to 1.02) | 0.09 |
| Area level (census tract) | ||||||||
| Income Inequality Index | 1.40 (0.19 to 10.57) | 0.74 | 1.35 (0.53 to 3.44) | 0.53 | ||||
| Crowding | ||||||||
| No | Referent | Referent | Referent | Referent | ||||
| Yes | 1.41 (1.04 to 1.90) | 0.03 | 1.40 (1.01 to 1.93) | 0.04 | 1.34 (1.17 to 1.53) | <0.001 | 1.29 (1.12 to 1.48) | <0.001 |
| Racial-ethnic concentration | ||||||||
| <47.8% | Referent | Referent | Referent | |||||
| >47.8% | 1.47 (1.19 to 1.83) | <0.001 | 1.31 (1.03 to 1.65) | 0.03 | 1.03 (0.94 to 1.14) | 0.52 | ||
| Proportion no HS diploma | 1.94 (0.65 to 5.75) | 0.23 | 2.60 (1.49 to 4.54) | <0.001 | 2.47 (1.29 to 4.74) | 0.007 | ||
| Poverty concentration | ||||||||
| <40% | Referent | Referent | ||||||
| >40% | 1.40 (0.81 to 2.42) | 0.23 | 1.04 (0.78 to 1.38) | 0.81 | ||||
| Proportion no health insurance | 2.30 (0.78 to 6.84) | 0.13 | 2.43 (1.42 to 4.17) | 0.001 | ||||
| Proportion under 18 years old | 0.29 (0.04 to 2.15) | 0.22 | 1.06 (0.44 to 2.52) | 0.90 | ||||
| Proportion foreign born | 0.31 (0.13 to 0.76) | 0.01 | 0.35 (0.13 to 0.90) | 0.03 | 0.95 (0.61 to 1.49) | 0.82 | 0.58 (0.35 to 0.96) | 0.03 |
*Pediatric: level 1=0–2 years, level 2=>2–5 years, level 3=>5–13 years, level 4=>13–18 years (inclusive); adult: level 1=19–25 years (inclusive), level 2=>25–45 years, level 3=>45–65 years, level 4=65+ years (non-inclusive).
HS, high school; MRSA, methicillin-resistant Staphylococcus aureus; MSSA, methicillin-sensitive Staphylococcus aureus.