30-day mortality risk after first time diagnosis of bacteremia according to educational level and effect of adjustment for social support, pre-existing comorbidity, substance abuse, characteristics of infection, and hospital characteristics.

aAge, sex, and nationality.bCohabitation and marital status.cComorbidities included in the Charlson comorbidity index and conditions related to substance abuse.dMicrobial agent, place of acquisition, and admitting specialty.eNumber of hospital beds, hospital volume, and medical school affiliation.