Table B.1.
Comorbidity indices by outcome.
| COVARIATE | No MRSA | MRSAγ | MRSA COLγ | HA-MRSAγ | CA-MRSAγ |
|---|---|---|---|---|---|
| n (%) | |||||
| CI Score | |||||
| not ill | 55,890 (29.5) | 9419 (36.7) | 808 (21.4) | 596 (11.3) | 8838 (43.2) |
| mildly ill | 86,913 (45.9) | 10,791 (42.1) | 1834 (48.7) | 2768 (53.2) | 8030 (39.3) |
| moderately ill | 35,249 (18.6) | 4125 (16.1) | 905 (23.9) | 1467 (28.2) | 2662 (13.0) |
| severely ill | 10,886 (5.7) | 1215 (4.7) | 215 (5.7) | 378 (7.3) | 837 (4.1) |
| MRSA Score | |||||
| 0 | 58,082 (30.6) | 8639 (33.7) | 180 (4.8) | 749 (14.4) | 7892 (38.6) |
| 1 to 2 | 102,502 (54.1) | 13,457 (52.5) | 894 (23.6) | 3327 (64.0) | 10,142 (49.6) |
| 3 to 4 | 26,634 (14.1) | 3263 (12.7) | 2132 (56.4) | 1046 (20.1) | 2219 (10.9) |
| >5 | 1720 (0.9) | 191 (0.7) | 694 (18.4) | 77(1.5) | 114 (0.6) |
|
| |||||
| County-level Mean(Std Dev) | |||||
| Density (swine/km2) | 9.3 (19.8) | 10.3 (20.4)** | 11.3 (22.8)** | 10.7 (20.8)* | 10.2 (20.4) |
| Farms >1000 swine | 3.1 (6.1) | 3.4 (6.1)** | 3.7 (6.8) | 3.6 (6.4) | 3.4 (6.1) |
CA, Community-Acquired; CI, confidence interval; COL, Colonization; HA, Hospital Acquired; MRSA, Methicillin Resistant Staphylococcus Aureus; Std Dev, standard deviation.
γ
Statistically significant difference in comorbidity index categories compared to non-MRSA, at the α <0.001 level, using chi-square test