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