Table 4.
Multivariable analysis of risk factors associated with 30-day all-cause mortality
| Variable | OR | 95% CI | P value |
|---|---|---|---|
| Community strain type* | 1·32 | 0·68–2·59 | 0·41 |
| Female gender | 2·34 | 1·25–4·35 | 0·008 |
| Age | 1·03 | 1·01–1·05 | 0·006 |
| Type of infection | |||
| Skin/soft tissue | Ref. | ||
| Blood | 4·00 | 1·42–11·02 | 0·009 |
| Pneumonia | 5·24 | 1·96–14·01 | 0·001 |
| Other† | 3·33 | 0·93–11·93 | 0·064 |
| Never treated with an anti-MRSA antibiotic | 9·46 | 1·71–52·21 | 0·01 |
| Charlson Comorbidity Index‡ | 1·15 | 1·02–1·29 | 0·02 |
| APACHE II score‡ | 1·05 | 1·02–1·09 | 0·002 |
OR, Odds ratio; CI, confidence interval; Ref., reference group.
*
Based on antibiotic susceptibility phenotype (minimum inhibitory concentration susceptible to gentamicin, clindamycin, and trimethoprim-sulfamethoxazole).
†
Other infection type (n = 46) includes 21 urinary tract infections, 19 intra-abdominal infections, and six arterial or venous cardiovascular system infections.
‡
These items measured each as continuous variables where odds ratio reflects changes for a one point change in the score.