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CAD Risk Calculator

Contributed by Dr. David Page. The probability values are expressed as the percentage of patients with significant coronary artery disease on angiography. Combined data from Diamond, Forrester, N Engl J Med 1979 and Weiner, Ryan, McCabe, N Engl J Med 1979.

CADRisk.html — HTML, 11Kb

File contents

<html>
<head>
<title>CAD Probability</title>
<style type="text/css">
p.title{
	text-transform: uppercase;
	font-size: 16;
	font-family: Arial;
	font-weight: bolder;
	text-align: left;
  	color: black;
}
p.heading{
	font-size: 12;
	font-family: Arial;
	font-weight: bolder;
	text-align: left;
	vertical-align: top;
	color: black;
}
p.normaltext{
	font-size: 12;
	font-family: Arial;
	font-weight: normal;
	text-align: left;
	vertical-align: top;
	color: black;
}
td.heading1{
	font-size: 12;
	font-family: Arial;
	font-weight: bold;
	text-align: left;
	vertical-align: top;
	color: white;
	background-color:black ;
	border-width: 1;
}
td.QuestionHeading{
	font-size: 12;
	font-family: Arial;
	font-weight: bold;
	text-align: left;
	vertical-align: top;
	color: white;
	background-color: #505050;
	border-width: 1;
}
td.AnswerHeading{
	font-size: 12;
	font-family: Arial;
	font-weight: bold;
	text-align: center;
	vertical-align: top;
	color: white;
	background-color: #505050;
	border-width: 1;
}

tr.odd{
	background-color: #ffffff;
}
tr.even{
	background-color: #dddddd;
}
td.question{
	font-size: 12;
	font-family: Arial;
	font-weight: normal;
	text-align: left;
	vertical-align: top;
	color: black;
	border-width: 1;
}
td.answer{
	font-size: 12;
	font-family: Arial;
	font-weight: bold;
	text-align: center;
	vertical-align: middle;
	color: black;
	border-width: 1;
}
td.normaltext{
	width: 100%;
	font-size: 12;
	font-family: Arial;
	font-weight: normal;
	text-align: left;
	vertical-align: top;
	color: black;
	background-color: white;
	border-width: 0;
}
input.formtext{
	width: 100%;
	height: 100%;
	font-size: 12;
	font-family: Arial;
	font-weight: normal;
	text-align: left;
	vertical-align: top;
	color: black;
	background-color: white;
	border-width: 1;
	border-style: solid; 
}
textarea.formtext{
	width: 100%;
	height: auto;
	font-size: 12;
	font-family: Arial;
	font-weight: normal;
	text-align: left;
	vertical-align: top;
	color: black;
	background-color: white;
	border-width: 1;
	border-style: solid;
}

</style>

<!-------Script to maximize window on loading----------->
<script language="JavaScript1.2">
<!--
top.window.moveTo(0,0);
if (document.all) {
top.window.resizeTo(screen.availWidth,screen.availHeight);
}
else if (document.layers||document.getElementById) {
if (top.window.outerHeight<screen.availHeight||top.window.outerWidth<screen.availWidth){
top.window.outerHeight = screen.availHeight;
top.window.outerWidth = screen.availWidth;
}
}
//-->
</script>
<!----------End maximizing window scipt---------->


<!-- CSS Script that removes textarea and textbox borders when printing ---(put this inbetween <header></header>)----------------->
<style type="text/css" media="print">
.DoNotPrint {
	display: none;
}
.noborder {
	scrollbar-3dlight-color: transparent;
	scrollbar-3dlight-color: transparent;
	scrollbar-arrow-color: transparent;
	scrollbar-base-color: transparent;
	scrollbar-darkshadow-color: transparent;
	scrollbar-face-color: transparent;
	scrollbar-highlight-color: transparent;
	scrollbar-shadow-color: transparent;
	scrollbar-track-color: transparent;
	background: transparent;
	overflow: hidden;
	border : 0px;
}
</style>
<!-- ----------------------------------------------------------------------------------------- -->

<script type="text/javascript" language="javascript">

function passGender(){
        if (document.getElementById("Gender").value == "M") {
                document.getElementById("Male").checked = true;
        }
         
      else if (document.getElementById("Gender").value == "F") {
                document.getElementById("Female").checked = true;
        }
}

function passAge() {
        
          if ((document.getElementById("Age").value  <40)&&(document.getElementById("Age").value >=30)){
               document.getElementById("30").checked =true;
         }
           else if ((document.getElementById("Age").value  <50)&&(document.getElementById("Age").value >=40)){
               document.getElementById("40").checked =true;
         }
           else if ((document.getElementById("Age").value  <60)&&(document.getElementById("Age").value >=50)){
               document.getElementById("50").checked =true;
         }
           else if ((document.getElementById("Age").value  <70)&&(document.getElementById("Age").value >=60)){
               document.getElementById("40").checked =true;
         }
           else if ((document.getElementById("Age").value  <30)){
               document.getElementById("warning").style.background='red';
         }
            else if ((document.getElementById("Age").value  >=70)){
               document.getElementById("warning").style.background='red';
         }

}




function getCheckedValue(radioObj) {

	if(!radioObj){
		return parseInt(0);
	}
	var radioLength = radioObj.length;
	if(radioLength == undefined){
		if(radioObj.checked){
			return parseInt(radioObj.value);
		}
		else {
			return parseInt(value);
		}
	}
	for(var i = 0; i < radioLength; i++) {
		if(radioObj[i].checked) {
			return parseInt(radioObj[i].value);
		}
	}
	return parseInt(0);
}

function TotalScore(){
var i = 0;
var j = 0;
var k = 0;
var L = 0;
	i += getCheckedValue(document.FormName.Age);
	j += getCheckedValue(document.FormName.Gender);
	k += getCheckedValue(document.FormName.Symptom);

        if (i==30 && j==1 && k==100 ) {
		L = 4;
	}
         if (i==40 && j==1 && k==100 ) {
		L = 13;
	}
         if (i==50 && j==1 && k==100 ) {
		L = 20;
	}
         if (i==60 && j==1 && k==100 ) {
		L = 27;
	}

 
         if (i==30 && j==2 && k==100 ) {
		L = 2;
	}

         if (i==40 && j==2 && k==100 ) {
		L = 3;
	}

         if (i==50 && j==2 && k==100 ) {
		L = 2;
	}

         if (i==60 && j==2 && k==100 ) {
		L = 2;
	}



         if (i==30 && j==1 && k==200 ) {
		L = 34;
	}

         if (i==40 && j==1 && k==200 ) {
		L = 51;
	}

         if (i==50 && j==1 && k==200 ) {
		L = 65;
	}

         if (i==60 && j==1 && k==200 ) {
		L = 72;
	}



         if (i==30 && j==2 && k==200 ) {
		L = 12;
	}

         if (i==40 && j==2 && k==200 ) {
		L = 22;
	}
         if (i==50 && j==2 && k==200 ) {
		L = 31;
	}
         if (i==60 && j==2 && k==200 ) {
		L = 51;
	}
     


         if (i==30 && j==1 && k==300 ) {
		L = 76;
	}

         if (i==40 && j==1 && k==300 ) {
		L = 87;
	}
         if (i==50 && j==1 && k==300 ) {
		L = 93;
	}
         if (i==60 && j==1 && k==300 ) {
		L = 94;
	}



         if (i==30 && j==2 && k==300 ) {
		L = 26;
	}

         if (i==40 && j==2 && k==300 ) {
		L = 55;
	}
         if (i==50 && j==2 && k==300 ) {
		L = 73;
	}
         if (i==60 && j==2 && k==300 ) {
		L = 86;
	}


	document.FormName.Score.value = L;
}



</script>


</head>

<body onload="passAge();passGender();">
<form method="post" action="" name="FormName">

<p class="title">
	Pretest probability of coronary artery disease in patients with 
</p>
<p class="title"> 
        chest pain according to age, gender and symptoms.
</p>
<p> 
        The probability values are expressed as the percentage of patients with significant coronary artery disease on angiography.
</p>
<p> 
        Combined data from Diamond, Forrester, N Engl J Med 1979 and Weiner, Ryan, McCabe, N Engl J Med 1979.
</p>


<div name="demographics">
<table width="700">
	<tr>
		<td class="heading1" width=25%>Patient name</td>
		<td class="formtext"><input class="formtext" name="PatientName" type="text" oscarDB=patient_name>
	</tr>
	<tr>
		<td class="heading1">Date:</td>
		<td class="formtext"><input class="formtext" name="TodaysDate" type="text" oscarDB=today>
	</tr>
        <tr>
		<td class="heading1">Patients age:</td>
		<td class="formtext"><input class="formtext" name="Age" id="Age" type="text" oscarDB=age>
	</tr>
         <tr>
		<td class="heading1">Sex:</td>
		<td class="formtext"><input class="formtext" name="Gender" id="Gender" type="text" oscarDB=sex>
	</tr>
</table>
</div>

<br>
<div name="warning">
<table width="700">
	<tr>
		<td  width=100% id="warning">This application is not suitable for patients younger than 30 or older than 69 years of age!</td>
		
	
</table>
</div>
<br>

<div name="Questionnaire">
<table width="700">
      
         <tr class="even">
                <td class="answer"><input type="radio" name="Age" id="30" value="30"></td>
		<td class="question"><p class="normal">Age 30-39 yrs</p></td>
		
	        <td class="answer"><input type="radio" name="Age" id="40" value="40"></td>
		<td class="question"><p class="normal">Age 40-49 yrs</p></td>
		
	        <td class="answer"><input type="radio" name="Age" id="50" value="50"></td>
		<td class="question"><p class="normal">Age 50-59 yrs</p></td>
		
	        <td class="answer"><input type="radio" name="Age" id="60" value="60"></td>
		<td class="question"><p class="normal">Age 60-69 yrs</p></td>
		
	<tr>

	
   

	<tr class="even">
                <td class="answer"><input type="radio" name="Gender" id ="Male" value="1"></td>
		<td class="question"><p class="normal">Male  </p></td>
		<td class="answer"><input type="radio" name="Gender" id="Female" value="2"></td>
                <td class="question"><p class="normal">Female</p></td>
		
		
	</tr>

</table>
<br>
<br>
<table width="700">


        <tr>
	         <td class="heading1" colspan="2">Pain description:</td>
        </tr>
</table>
<table width="700">
	<tr class="even">
                <td class="answer"><input type="radio" name="Symptom" id="Nonanginal" value="100"></td>
		<td class="question"><p class="normal">Nonanginal pain</p></td>
		<td class="answer"><input type="radio" name="Symptom" id="Atypical" value="200"></td>
		<td class="question"><p class="normal">Atypical angina</p></td>
		<td class="answer"><input type="radio" name="Symptom" id="Typical" value="300"></td>
                <td class="question"><p class="normal">Typical angina</p></td>
		
	</tr>
        


      
	
</table>
<br>
<table width="700">
<tr>
	<td><input type="button" onclick="TotalScore()" value="Calculate pretest probability of coronary heart disease"></td>
	<td><input type="text" name="Score" size="10" value="">%</td>
</tr>
</table>

</div>


<br>
<br>



<div name="Application" class="DoNotPrint">
<table width="700">

<tr>
	<td class="heading1" colspan="2">Recommendations</td>
</tr>
<tr id="severe">
	<td></td>
	<td> </td>
</tr>
<tr id="moderate">
	<td></td>
	<td> </td>
</tr>
<tr id="mild">
	<td></td>
	<td></td>
</tr>
</table>

<br>
<br>
<!-- The submit/print/reset buttons ------------------------------------------------------------->
<div name="FunctionButtons" class="DoNotPrint">
<table>
<tr>
	<td class="subjectline">
		Subject: <input name="subject" size="40" type="text">
		<input value="Submit" name="SubmitButton" type="submit">
		<input value="Reset" name="ResetButton" type="reset">
		<input value="Print" name="PrintButton" onclick="javascript:window.print()" type="button">
	</td>
</tr>
</table>
</div>

</form>
<!-- ------End of submit/print/reset buttons----------------------------------------------------->
</body>
</html>
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