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Description
Body Mass Index (BMI)
Returns a continuous variable, with the limits of 10-80 as valid ranges of BMI. Anything outside these bounds are returned as the respective bound.
Limitation
BMI calculation is reliant upon accurate patient height and weight data. Inaccurate height or weight patient data can cause an error in the reported BMI. Missing height or weight data will not return a value for BMI.
Data quality is limited to individual site documentation accuracy, completeness, and variable mapping, which is performed by each site, independently.
MPOG, as the coordinating center, reviews data quality at each data upload and monthly via Data Diagnostics and Case Validation tools. This review,
while thorough, may not contain all data elements relevant to this phenotype and thus should be carefully reviewed by the user.
Enumeration
| Value |
Value Code |
Definition |
Logic
Height and Weight collations have specific valid ranges which are defined in their respective collation documentation. See these collation documents for more information.
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This collation determines if either/both Weight(kg) or Height(cm) is a NULL value, BMI returns NULL
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Then, calculates BMI = Weight(kg) / (Height(cm)*100)2
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After the BMI calculation is made only include values [10-80]. If outside this range, BMI returns as NULL.
[ ] = inclusive (meaning including the values of BMI=10 and BMI=80)