BSA comparison

This article compares body surface area (BSA) calculations across various age groups, from premature infants to young adults, using multiple formulas.

In the dataset, the BSA values for a premature infant weighing 2 kg and measuring 40 cm in height are calculated using different formulas: the Boyd method yields 0.15 m², while the DuBois method gives 0.14 m², and the Gehan formula results in 0.16 m². The Haycock formula also provides a BSA of 0.15 m², while the Mosteller method matches it at 0.15 m². The Dreyer method, which considers weight only, results in a BSA of 0.16 m². The mean BSA for this group is 0.15 m² with a standard deviation of 0.00.

For neonates, the height of 50 cm and weight of 3 kg yield a Boyd BSA of 0.21 m², with the DuBois method providing 0.20 m² and Gehan 0.22 m². The Haycock method also calculates 0.21 m², while Mosteller gives 0.20 m², and Dreyer results in 0.21 m². The mean BSA for neonates is again 0.21 m², with a standard deviation of 0.00.

As children grow, the BSA values increase. For a 1-year-old weighing 10 kg and measuring 75 cm, the Boyd method calculates a BSA of 0.48 m², while DuBois gives 0.44 m², and Gehan matches Boyd at 0.48 m². The Haycock method results in 0.46 m², and both Mosteller and Dreyer yield 0.46 m². The mean BSA for this age group is 0.46 m², with a standard deviation of 0.00.

At 2 years old, with a height of 85 cm and weight of 13 kg, the Boyd formula gives a BSA of 0.58 m², while DuBois results in 0.54 m², and Gehan provides 0.57 m². The Haycock method calculates 0.56 m², and Mosteller gives 0.55 m². The mean BSA is 0.56 m², with a standard deviation of 0.00.

For a 3-year-old, the height of 95 cm and weight of 15 kg yield a Boyd BSA of 0.65 m², with DuBois at 0.62 m² and Gehan matching Boyd at 0.65 m². The Haycock method results in 0.63 m², while Mosteller gives 0.63 m², and Dreyer results in 0.61 m². The mean BSA is 0.62 m², with a standard deviation of 0.01.

As children reach 4 years old, with a height of 102 cm and weight of 16 kg, the Boyd method calculates a BSA of 0.69 m², while DuBois gives 0.67 m², and Gehan also yields 0.69 m². The Haycock method results in 0.67 m², with Mosteller at 0.67 m² and Dreyer at 0.63 m². The mean BSA is 0.66 m², with a standard deviation of 0.02.

At 6 years old, a child measuring 115 cm and weighing 22 kg has a Boyd BSA of 0.86 m², with DuBois at 0.83 m² and Gehan also at 0.86 m². The Haycock method provides 0.84 m², Mosteller gives 0.84 m², and Dreyer results in 0.79 m². The mean BSA is 0.82 m², with a standard deviation of 0.03.

For a 10-year-old, standing at 137 cm and weighing 33 kg, the Boyd formula yields a BSA of 1.14 m², with DuBois at 1.12 m² and Gehan matching Boyd at 1.14 m². The Haycock method gives 1.12 m², Mosteller also at 1.12 m², and Dreyer results in 1.03 m². The mean BSA is 1.09 m², with a standard deviation of 0.05.

At 15 years old, with a height of 170 cm and weight of 57 kg, the Boyd method calculates a BSA of 1.64 m², while DuBois gives 1.66 m², and Gehan provides 1.65 m². The Haycock method results in 1.63 m², Mosteller at 1.64 m², and Dreyer yields 1.48 m². The mean BSA is 1.59 m², with a standard deviation of 0.09.

Finally, for an 18-year-old measuring 175 cm and weighing 68 kg, the Boyd formula gives a BSA of 1.82 m², while DuBois calculates 1.83 m², and Gehan also results in 1.83 m². The Haycock method gives 1.82 m², Mosteller at 1.82 m², and Dreyer results in 1.67 m². The mean BSA for this age group is 1.77 m², with a standard deviation of 0.09.

In the Z-Score section, the slope is noted to be 19.37, with an intercept of 0.57 and a standard deviation of 2.38. The calculated Z-Scores for the different age groups show that the premie has a Z-Score of 2.87, while the neonate has a Z-Score of 2.34. The 1-year-old has a Z-Score of 0.42, and the 2-year-old has a Z-Score of -0.14. As the children grow older, the Z-Scores trend downward, with the 3-year-old at -0.51, the 4-year-old at -0.70, the 6-year-old at -1.47, the 10-year-old at -2.61, the 15-year-old at -4.36, and the 18-year-old at -4.92.