Table A1 Description of the models on which the best approximation formulae are based.

Model	Explanatory variable	Coefficient (B)	95% CI	R2
1 (males)	Constant	−137.432	[−141.497; −133.366]	0.846
	Body height (cm)	0.60035	[0.57856; 0.62213]
	Waist circumference (cm)	0.785	[0.765; 0.805]
	Hip circumference (cm)	0.392	[0.367; 0.418]
1 (females)	Constant	−110.924	[−115.565; −106.283]	0.815
	Body height (cm)	0.4053	[0.37851; 0.43208]
	Waist circumference (cm)	0.325	[0.309; 0.342]
	Hip circumference (cm)	0.836	[0.810; 0.863]

Complete information on the other models can be viewed on the J Neurol Neurosurg Psychiatry website at http://www.jnnp.com/supplemental.