Table 1 Encoding operated, required, dependent, and ordered constraints for CDEs with prefix notation. Examples of (A) an operated constraint for calculating BMI, (B) a required constraint for demography information, (C) a dependent constraint for smoking history, and (D) an ordered constraint
Constraints | Example of Clinical Documents | Set of CDE IDs and Names |
|---|---|---|
Prefix Notation for Formulating Constraints | ||
A) Operated | Weight (kg): Height (cm): BMI (kg/m2): | CDE30 Body Weight Value in kg CDE31 Body Height Value in cm CDE32 Body Mass Index Value |
(IF (= CDE31.unit_of_measure āmā) (/ CDE30 CDE31 CDE31) (/ CDE30 CDE31 CDE31 100,100)); (/ CDE30 CDE31 CDE31 100,100) | ||
B) Required | 1) *Patient Age: 2) *Gender ā Female ā Male ā Unknown ā Unspecified ā Not reported 3) Ethnicity: ā Hispanic or Latino ā Unknown ā Not Hispanic or Latino ā Not reported | CDE40 Patient Age CDE41 Patient Gender CDE42 Patient Ethnicity |
(Required CDE40 CDE41) | ||
C) Dependent | Smoking History 1) *Current tobacco use? ā Yes ā No ā Unknown 2) *Past tobacco use? ā Yes ā No ā Unknown 3) Age when tobacco use started (years)? (Skip if Q1 and Q2 are both No) | CDE20 Current Smoking Indicator CDE21 Past Smoking Indicator CDE22 Age When Tobacco Use Started |
(IF (or (!= CDE20 āYesā) (!= CDE21 āYesā)) CDE22 NULL) | ||
D) Ordered | (Ordered CDE20 CDE21 CDE22) | |