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Coronary heart disease (CHD) is a disease in which a waxy substance called plaque builds up inside the coronary arteries. These arteries supply oxygen-rich blood to your heart muscle. You can read more information on this at the National Heart Lung and Blood Institute website.
We had this requirement come in from a partner on how we could store all the patient vital data with CRM and calculate a risk score. Our example shows how to set up a Multi-Sheet Decision Table to evaluate the patient’s risk score of Coronary Heart Disease.
Each Decision Table Sheet will evaluate specific Risk Factors with a variety of Conditions and decide if that risk factor applies to the patient. A final Decision Table Sheet will then provide a Risk Score based on the individual Risk Factors.
For this article it is assumed that you have at least basic familiarity with Decision Tables and/or have read the following articles:
- Everything you need to know about Decision Table Conditions
- How to set up your Actions!
- Introduction to Multi-Sheet Decision Tables
Note: We will not detail step-by-step instructions here on how to set up Conditions, Actions or Multi-Sheet Decision Tables, please read the above articles if you need detailed configuration steps.
The Risk Factors for Coronary Heart Disease are detailed below (taken from American Council on Exercise):
Risk Factor 1: Smoking Considered a risk if they meet any of the following criteria
- Is the patient currently a smoker?
- Have they given up smoking in the last 6 months?
- Do they have environmental exposure to cigarette smoke in work or at home?
Risk Factor 2: Lifestyle Considered a risk if the patient doesn't get a minimum amount of weekly exercise
Risk Factor 3: Obesity Considered a risk if the patient has a BMI rating of 30 or higher along with the a waist measurement of
- 102 cm (40 inches) for males
- 88 cm (35 inches) for females
Risk Factor 4: Hypertension Considered a risk if the patient's systolic blood pressure => 140 mm Hg and/or diastolic blood pressure >= 90 mm Hg or on antihypertensive medication?
Risk Factor 5: Dislipidemia Considered a risk if the patient's low-density lipoprotein cholesterol (LDL-C) >= 130 mg-DL-1 or their high-density lipoprotein cholesterol (HDL-C) < 40 mg-DL-1 or on lipid-lowering medication.
Risk Factor 6: Prediabetes Considered a risk factor if the patient's fasting plasma glucose => 100 mg-DL-1 but < 126 mg-DL-1 or impaired glucose tolerance (IGT) >= 140 mg-DL-1 but < 200 mg-DL-1
Risk Factor 7: Age Age is considered a risk factor in men over 45 and women over 55
Risk Factor 8: Family History Considered a risk if a first-degree male relative over 55, or female relative over 65, suffers from myocardial infraction, coronary revascularization or sudden death.
Mitigating Factor A high-density lipoprotein (HDL-C) reading of > 60 mg-DL-1 is believed to lower the risk of Coronary Heart Disease.
In our example the Contact record contains additional fields for all these values.
The Multi-Sheet Decision Table will have to evaluate all the above data to calculate the Risk Score.
To solve this we will create 10 Decision Tables Sheets
- Age - Gender
- High HDL
- Family History
- Risk Score
N52 Formula Manager Solution
The Formula Manager solution works like this:
- A formula of type 'Save - To Current Record' is created on the Contact entity
- The Source Properties are set to fields shown above
- The Event is set to 'Create & Update'
- Exit this Decision Table on First Match is turned On (checked) for each of the 'Risk Factor' Decision Table Sheets, it is turned Off (unchecked) for the Risk Score Decision Table Sheet
- Exit all Decision Tables on First Match is turned Off (unchecked) on all Decision Table Sheets
Sheet 1: Smoking
Sheet 2: Lifestyle
Sheet 3: Obesity
Sheet 4: Hypertension
Sheet 5: Dyslipidemia
Sheet 6: Prediabetes
Sheet 7: Age - Gender
Sheet 8: High HDL
Sheet 9: Family History
Sheet 10: Risk Score
This table uses a Action-Calculation (Column J) field to keep a running sum of the individual risk factors based on the results of the individual Decision Table Sheets. You can think of this as a variable result which is then used to update the Coronary Artery Disease Risk Score field on the Contact entity.
The Calculations Table has a single calculation in this Decision Table
- Age - used to calculate the current age of the Contact