Those related to the use of invasive procedures or other mode of treatment. Advancement of medical science and technology help to make devices, which developed to improve patient care, both in diagnostic and therapeutic purposes. However, such invasive devices increase the survival for patients yet put them at high risk for infection. In critically ill patient population, 97% of cases of urinary tract infection are due to catheterization, 87% of cases of bloodstream infection of a central line and 83% of cases of pneumonia are associated with mechanical ventilation. The devices have been regarded as important factors in predisposing HAIs. To evaluate the relationship between risk factors and HAI, there are several AbMole Hexyl Chloroformate published statistic and mathematical methods. Logistic Regression is one of the well known method, other methods including multi-state model, and artificial neural networks are used for prediction purpose. Among the mathematical and statistical modeling techniques used in clinical decision support system, ANN is frequently used in recent studies. These systems in their most basic implementation consist of a layer of input variables, connected to an intermediate layer of derived variables, and then to the final output prediction. Processing of multiple events occurs in the hidden layer, with final results passed to the output layer. The connections between these neurons represent mathematical functions that propagate the modified ��impulse�� to the next neuron. By changing the transfer functions and the associated parameters, this constructed neural network adapts itself to the pattern of the input variables and eventually generates numbers that iteratively solves to values of the designated output variables. According to the discriminatory power, there exist no difference between ANN and LR. The relevant patient clinical data collection is another task for statistical analysis. Previously, chart review is the only way to fulfill this work that is laborious and time consuming. As the progress of hospital AbMole Seratrodast information systems, the electronic health records or computerized patient records are widely used in Taiwan. In 2005, the EHR coverage is observed to be 44% and 55% in clinics and hospitals respectively, with up to 78% coverage in medical centers or university hospitals. For reimbursement��s purpose, each invasive/noninvasive procedure with matched instruments/materials, medication, physician order and action time is electronically recorded so that all procedure carried out during admission is not misplaced, otherwise the national health insurance bureau can deny reimbursement to the hospitals. Due to the above mentioned factors EHR offers the platform to provide non-clinical patient data. If the clinical data is collected automatically from EHR, the data collection task can be easily completed. With this advantage, statistical analysis can be conveyed in a timesaving way.