Table 3. Linear relation between BMI SDS at young adulthood and BMI SDS at earlier age: Model A includes one status score as independent variable (a), model B is model A extended with the preceding BMI SDS# (b) as independent variable.
Independent variables | Models A* | Models B* | ||||||
β & | SE | P | Adj R2 | β1 & | SE | P | Adj R2 | |
β2 & | ||||||||
(a) BMI sds at birth | 0.158 | 0.047 | 0.001 | 0.035 | – | – | – | – |
– | – | – | – | |||||
(a) BMI sds at 8 d | 0.320 | 0.057 | <0.001 | 0.060 | 0.390 | 0.084 | <0.001 | 0.061 |
(b) BMI sds at birth | −0.077 | 0.069 | 0.260 | |||||
(a) BMI sds at 4 m | 0.307 | 0.060 | <0.001 | 0.054 | 0.210 | 0.066 | 0.002 | 0.071** |
(b) BMI sds at 8 d | 0.239 | 0.063 | <0.001 | |||||
(a) BMI sds at 1 y | 0.562 | 0.057 | <0.001 | 0.138 | 0.591 | 0.068 | <0.001 | 0.138 |
(b) BMI sds at 4 m | −0.052 | 0.071 | 0.464 | |||||
(a) BMI sds at 2 y | 0.559 | 0.053 | <0.001 | 0.146 | 0.346 | 0.081 | <0.001 | 0.158** |
(b) BMI sds at 1 y | 0.291 | 0.083 | 0.001 | |||||
(a) BMI sds at 6 y | 1.095 | 0.049 | <0.001 | 0.407 | 1.583 | 0.077 | <0.001 | 0.454** |
(b) BMI sds at 2 y | −0.557 | 0.069 | <0.001 | |||||
(a) BMI sds at 10 y | 1.014 | 0.035 | <0.001 | 0.530 | 1.126 | 0.080 | <0.001 | 0.530 |
(b) BMI sds at 6 y | −0.155 | 0.099 | 0.177 | |||||
(a) BMI sds at 18 y | 1.065 | 0.020 | <0.001 | 0.790 | 1.292 | 0.041 | <0.001 | 0.790** |
(b) BMI sds at 10 y | −0.305 | 0.047 | <0.001 |
Intercepts not reported #Interaction effects between BMI SDS at the end and at the start of the periods were not included in models B, because they were all non-significant,
F-test for comparing the multiple regression model with the simple regression model is significant (P<0.001),
values of β, β1 and β2 are adjusted for gender and the age at the measurement of BMI SDS at young adulthood, – Not applicable, Adj R2 adjusted variance.