Evaluation of the use of the National Surveillance System Software as part of a Regional Hospital Nosocomial Infections Surveillance System. Costa Rica, 2009

Background: The adequate follow up of surveillance systems is a major concern in Public Health. In the year 2005 a National Surveillance System Software (NSSS) was implemented. Nosocomial Infections Surveillance System (NISS) started the same year, to input and analyze data from (NSSS). Study aims to evaluate the (NSSS) as part of the (NISS).

Methods: Centers for Disease Control and Prevention guide for Public Health Surveillance was used. Data was obtained from hospital records, and from the official software database. We applied a questionnaire to selected personnel involved. We measure simplicity as the number of persons who knew how to follow procedures. Acceptance as the use of the software. Timeliness as notification of cases before 48 hours. Specificity, sensitivity and positive predictive value was obtained by comparing the reports included in the software, with the traditional written reports, using the last as gold standard.

Results: Incidence 0.4% (95%CI=0.38-0.42). Four (9.5%) of 42 interviewed personnel . Three (7.1%) of 42 persons uses the software, only for report purposes. Timeliness had an average of 21 days (SD=15). Specificity was 16642 (99%) out of 16687 non infected registers. Sensitivity was 26 (28%) out of 91 registered cases. The (PPV) resulted in 26 (36%) out of 71 cases reported by (NSSS).

Conclusions: The evaluation indicates lack of knowledge and therefore use of (NSSS) that leads to a useless, none accepted system. Low sensitivity causes misrepresentation of the indicators used for the Nosocomial Infections surveillance. We recommend continuous education reinforcement on the skills needed for an adequate use of the software, as part of the Surveillance System.

Keywords: Surveillance, System, Evaluation, Nosocomial Infections 

Author (s): 

Quesada, Fabio C.,

Presenter (s): 
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