title: [Factors influencing hospital infection in patients in the intensive care unit].
abstract: OBJECTIVE
  The accumulation of risk factors in hospitalized patients is one of the elements contributing to the increase in the frequency of nosocomial infection in the intensive care unit (ICU). Our aim was to identify nosocomial infection risk factors in the ICU of our hospital.
  
  
  METHODS
  We performed a prospective cohort study of 1,134 patients admitted to the ICU for at least 24 hours in 2001. The patients were followed-up for 48 hours after leaving the ICU. Multivariate Cox regression analysis was used to identify risk factors.
  
  
  RESULTS
  The intrinsic risk factors identified were the principal diagnosis motivating admission to the ICU, traumatic brain injury and renal insufficiency. Invasive techniques that were independently associated with nosocomial infection (from high to low risk) were urinary catheter, tracheostomy, mechanical ventilation, Swan-Ganz catheter, and total parenteral nutrition.
  
  
  CONCLUSIONS
  Although endogenous risk factors, which cannot be modified, represented the most important associated factors, steps to reduce nosocomial infections should concentrate on the following exogenous risk factors: urinary catheter, tracheostomy, mechanical ventilation, Swan-Ganz catheters, and total parenteral nutrition.
authors.affiliation: Servicio de Medicina Preventiva y Salud Pública, Hospital Universitario Reina Sofía, Córdoba, Spain.
authors.forename: Aurora
authors.initials: A
authors.lastname: Llanos-Méndez
authors.forename: Carmen
authors.initials: C
authors.lastname: Díaz-Molina
authors.forename: José Luis
authors.initials: JL
authors.lastname: Barranco-Quintana
authors.forename: Visitación
authors.initials: V
authors.lastname: García-Ortúzar
authors.forename: Rafael
authors.initials: R
authors.lastname: Fernández-Crehuet
mesh_terms: D000328:Adult; D000368:Aged; D001930:Brain Injuries / Q000150:complications; D002407:Catheterization, Swan-Ganz / Q000009:adverse effects; D015331:Cohort Studies; D003428:Cross Infection / Q000453:epidemiology* / Q000517:prevention & control; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007362:Intensive Care Units; D008297:Male; D008875:Middle Aged; D010289:Parenteral Nutrition, Total / Q000009:adverse effects; D011446:Prospective Studies; D012044:Regression Analysis; D051437:Renal Insufficiency / Q000150:complications; D012121:Respiration, Artificial / Q000009:adverse effects; D012307:Risk Factors; D013997:Time Factors; D014139:Tracheostomy / Q000009:adverse effects; D014546:Urinary Catheterization / Q000009:adverse effects