Table 3:

Equation for estimating reference values for the different parameters^a

	Equations
H-V girls	μ = 443 574.11 − 97 540.24$\sqrt{X}$ − 231 497.89X3
	σ = 104 925.72 − 37 776.52X
H-V boys	μ = 707 969.47 − 45 502.94 log X − 538 257.55X3
	σ = 200 387.18 − 82 416.42X
APD-V girls	μ = 585.75 − 336.12X3
	σ = 121.27
APD-V boys	μ = 1 083.91 − 689.41X3
	σ = 226.61
APD-P girls	μ = 38.13 − 2 log X − 10.21X3
	σ = 4.09
APD-P boys	μ = 83.63 − 6.40 log X − 31.23X3
	σ = 12.09 − 4.71X
APD-MP	μ = 5.98 + 0.053X−0.05 − 1.31X
	σ = 0.48

^aWith $X=\exp \left\{\frac{T-T_1}{T_n-T_1}\log \rho \right\}$, where T denotes the age, T₁ and T_n denote minimum and maximum ages, respectively, and ρ is a preselected constant for which a suitable value is .01. All measurements needed prior Box-Cox transformation. The values of APD-MP were similar in both sexes.