Abstract：
BACKGROUND:In this study we introduce a new view of hospital infection, to apply time series techniques to it. Our objective is to complement hospital infection's epidemiological surveillance by means of obtaining alert and alarm thresholds that make easy to the epidemiologist the decision of intervention, in case they are exceeded. METHODS:We have used the classic time series analysis described by Rumeau-Rouquette, and ARIMA (Autoregresive Integrated Moving Average) models developed by Box and Jenkins. The study focus on three hospital units: one intensive care, one long term care and one surgical unit. The nosocomial infection intervals have been calculated with a 68% (1SD) and 95% (2SD) confidence levels. RESULTS:We detect an ascending general trend in the last two units, without the detection of seasonal variations. Two ARIMA (1, 0, 0) models we obtained for surgery and long term care, discarding other better adjusted models, more complex and difficult to obtain, but with no real advantage in prediction power. Confidence intervals were calculated with both methods. We did not find general trend and seasonal variations for intensive care unit. No model was considered valid, because of its high random component. The nosocomial infection intervals have been calculated with mean +/- 1SD and mean +/- 2SD. CONCLUSIONS:We think that more precise knowledge of hospital infection, with a high random component in our study, can be in addition useful to assign priority to human and material resources.
journal_name
Med Clin (Barc)journal_title
Medicina clinicaauthors
López del Val JA,Calvete Fernández HI,Carreter Oróñez CA,Abaurrea León J,Muniesa Cuenca MP,García Mata JR,Hernández Navarrete MJ,Arribas Llorente JLkeywords:
subject
Has Abstractpub_date
1992-06-06 00:00:00pages
52-6issue
2eissn
0025-7753issn
1578-8989journal_volume
99pub_type
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