Huwez et al developed a formula to predict the body surface area of pediatric patient based on the age in months. The authors are from the Royal Infirmary in Glasgow.



(1) age in months


body surface area in square meters =

= (0.00594 * (age in months)) + 0.503



• There are approximately 30.417 days in the average month (365 divided by 12).



• The correlation with the formula of Dubois and Dubois showed an r value of 0.94.

• There is no adjustment for gender, height or weight. Performance is probably better in early childhood than during adolescence.

• The population appears to be Scots. The formula may need to be modified for other racial groups (like Asians).


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