Table 4. Coefficients used to derive the childhood obesity risk score from a multivariable logistic regression model for each equation comprising baby’s sex, birthweight z-score and weight change z-score.

		Coefficient values
	Variable	Equation 1	Equation 2	Equation 3
Α	Constant	−3.718	−3.542	−3.937
β1	Female sex	0.488	0.288	0.234
β2	Birthweight z-score	0.599	0.551	0.824
β3	Weight z-score changea	1.501	1.508	2.174

^aWeight change z-score from birth to 6, 9 or 12 months in equation 1, 2 and 3 samples respectively.

Probability childhood obesity = 1/(1+ e ^{-[α+β1+ β2+ β3]}).