Changes over time in body weight (top) and body length (bottom) of infants with and without former BPD (means with 95% CIs) The p -values show the extent of statistical significance of the covariates gestational age (p
) and birth weight (p
); those of the main effects by postmenstrual age (p
) and BPD (p
); and that of the interaction (p
) of both factors. Statistically significant values are shown in bold.