Ideal Body Weight

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Ideal Body Weight

Description

Calculating the ideal body weight for a patient

References:

Phillips S, Edlbeck A, Kirby M, Goday P. Ideal Body Weight in Children. Nutrition in clinical Practice (2007) 22:240-245
ARDS Network. http://www.ardsnet.org/tools.shtml
CDC Children growth charts: https://www.cdc.gov/growthcharts/percentile_data_files.htm

Limitation

There are 2 formulas used in this collation, one for patient’s aged 1-17 years old and one for patient’s aged >=18 years old.

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.

Value Type

Enumeration

Value	Value Code	Definition

Return Columns

Name	Data Type

Granularity

Logic

IF patients aged: 1-17 years AND height > 74cm

then IBW using the McLaren Method uses the CDC growth charts to determine IBW for children 2-17 years old and WHO growth charts for children < 2 years old by sex. This method plots the child’s height for age and extends a line horizontally to the 50th percentile height-for-age line. You then extend a line vertically from the 50th percentile height-for-age line to the corresponding 50th percentile weight. This the child’s IBW. 1

For patients aged >= 18 years2:

If collation.Sex = 0 then IBW = 50 + 0.91 * (collation.height – 152.4cm)

If collation.Sex = 1 then IBW = 45.5 + 0.91 * (collation.height – 152.4cm)

If patient height < 74cm or patient age <1, returns NULL