**Home**

Use **Quick help** in Home page first

Use **Help** item in main menu in the left side of DesktopDx system
for a review of system

Use **Help** icon in different pages for getting help about that page

**Diseases**

In this page you can define your **Diseases**

After entering the name of Disease click **New** command

For defining **Statistical models** click on the appropriate commands
for the Disease: **Regression , ANN , CutOff**

**Regression Models**

In this page you can define Regression models for Diseases.

Enter Name and Constant and click **New Regression** button to create
a new Regression model.

Constant must be a number **between -1 and 1**.

Click **Factors** button to define **Factors** for your Regression
model; the factors are shown in the **Factors** section below.

In the **Factors** section the Factors
for Regression models are defined.

First select the Regression model by clicking on **Factors** button.

Select the Factros from the list; the Factors for a model can not be
repeated.

Enter **Coefficent** value for each Factor and click **New Factor**
button; the coefficient must be a number **between -1 and 1**.

Note: The sum of Constant value and Coefficient values must be a number
**between 0 and 1**.

**ANN models**

You can define ANN models for your Diseases in this page.

**CCR** or **Correct Classification Rate** is the percent of
correct estimation of this ANN model for all data. CCR is calculated by
the ANN designing software and is a number between 0 and 100. If you
don't know the CCR, use 100 for it.

You can define and see Factors and Cases of this model by clicking on **
Factors-Cases** button.

Factors and Cases of ANN model are defined in the **
Factors** section. These factors can not
repeat for a model.

You must note the order for selecting these Factors, the inputs for
Cases of ANN model or **Factors Values** in **Cases** section are
defined according to this order.

Cases for ANN model are defined in the **Cases**
section. Each case defines the Factors status for that case, fore
example **101** means positive first and third Factors and negative
second factor. For defining all probable Cases for the model according
to defined Factors, click on the **Create Cases** button.

After defining Cases by system, you can define **Disease Value** (0
for negative and 1 for positive value) and **Case Probability** for
each case.

**Case Probability** means probability of correct diagnosis for that
case, this value is calculated by the ANN software. If you don't know
the value, use 100.

**CutOff models**

In this page you can define CutOff models for your Disease; CutOff
models compare sum of score of Factors with CutOff value.

After defining **CutOff Value** , you must enter **PPV (Probability
of Disease when the model output is positive)** and **NPV
(Probability of no Disease when the model output is negative)** too.

Factors for the CutOff model define in the **
Factors** section. Factors for each model can not be repeated.

**Scores** can be any positive or negative number; If the
corresponding Factor is positive, this number is added to sum of Scores
to compare with CutOff value.

**Factors**

In this page you can define your Factors.

Factors are signs, symptoms, paraclinical data or any other predicting
variable for Disease probability.

These factors can be used in different Statistical models for Diseases.

Use **Insert** button for creating new Factor.

Use **Search** button to search by any part of the Factor Name.

**Diagnosis by Disease**

In this page the Probability of one Disease by defined statistical
models is calculated.

At first select the Disease from the **Disease** drop down list, then
select your models from the appropriate lists below; for selecting
multiple choices from a list, use Ctrl and Click at the same time.

Click on the **Show Factors** button to see appropriate Factors in
relation to the selected Models. Check your choices.

Click on the **Diagnose** button to see calculated probabilities for
different models and all models at all.

**Diagnosis by Factor**

In this page the probability of different Diseases according to the
selected **Factor(Chief Complaint)** is calculated. This probability
is calculated according to Statistical Models that defined in the system
and the selected **Factor(Chief Complaint)** is used in them.

Select your Factor from the **Factor(Chief Complaint)** drop down
list first; if you like, you can see and select other related Factors
too by clicking on **Show Related Factors**.

Click on the **Diagnose** button to see probabilities of different
Diseases by using different Models; in the end the total probabilities
of different Diseases is shown in Descending order.

Designed by : DrToussy-ToussySoftware : 2011