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 |
Weight 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]).