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Equations to estimate prednisone dose using body weight

Francesco Emma1, Giovanni Montini2,3, Antonio Gargiulo4

  • 1Department of Pediatric Subspecialties, Division of Nephrology, Bambino Gesù Children's Hospital - IRCCS, Piazza S. Onofrio 4, 00165, Rome, Italy. francesco.emma@opbg.net.

Pediatric Nephrology (Berlin, Germany)
|October 29, 2018
PubMed

Insights

Simplified prednisone dosing for children is now possible using weight-based linear equations. These new formulas accurately approximate body surface area (BSA) dosing, improving pediatric prednisone (PDN) prescription accuracy.

Area of Science:

  • Pediatric pharmacology
  • Clinical drug dosing
  • Biometrics

Background:

  • Prednisone (PDN) dosage in children is commonly weight-based, but body surface area (BSA) is considered more accurate due to better correlation with PDN metabolism.
  • Weight-based dosing risks underdosing in young children, while BSA calculations require height and are more complex.

Purpose of the Study:

  • To develop simplified linear equations for estimating BSA-based prednisone doses using only patient weight.
  • To provide a practical alternative to complex BSA calculations in pediatric clinical practice.

Main Methods:

  • Developed linear equations using anthropometric data from 754 pediatric patients.
  • Validated the equations prospectively in 77 children with steroid-sensitive nephrotic syndrome.
  • Derived equations for 60 mg/m² ([2×W+8]) and 40 mg/m² ([W+11]) prednisone doses.

Main Results:

  • The developed linear equations accurately approximated BSA-based prednisone doses.
  • The equation for 60 mg/m² showed an average error of 3.4%.
  • The equation for 40 mg/m² demonstrated an average error of 2.2%.

Conclusions:

  • The proposed weight-based equations reliably predict BSA-based prednisone doses in children.
  • These simplified formulas offer a practical solution to overcome limitations in current pediatric dosing practices.
  • The findings support improved accuracy and ease of prednisone prescription for pediatric patients.
Abstract

Keywords:
Body surface areaIdiopathic nephrotic syndrome

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