Table 2 Verbal and language ability random slopes and random short stature mixed effects model including short stature and timepoint interaction effect (n = 12,536)

Fixed effects

Coef

95% CI

 Timepoint

 − 0.009*

 − 0.017, − 0.002

 Short stature

 − 0.261***

 − 0.373, − 0.150

 Short stature # timepoint

0.003

 − 0.035, 0.041

 Constant

0.063***

0.041, 0.086

Random effects

 Variance (timepoint)

0.039

0.035, 0.044

 Variance (constant)

0.679

0.637, 0.742

 Covariance (timepoint, constant)

 − 0.111

 − 0.124, − 0.097

 Variance (residual)

0.536

0.524, 0.547