Fig. 3From: Prevalence, correlates, and trajectory of screen viewing among Chinese children in Changsha: a birth cohort studyConditional structural latent growth model to assess the relationships of the changes in outdoor play (PA) and screen time (ST). (C1-C2 Correlation of the intercept 1 and slope 1, C3-C4. Correlation of the intercept 2 and slope 2)Back to article page