Skip to main content

Table 2 Model search process for physical activity (PA) trajectories

From: Developmental trajectories of physical activity and television viewing during adolescence among girls: National Growth and Health Cohort Study

Determining the number of PA trajectory groups
Number of groups BIC Smallest group %
2 −48,370 29.0
3 −48,182 6.1
4 −48,014 5.6
5 −47,948 3.0
  
The final number of PA trajectory groups was determined to be 4.
  
Determining the highest model function of the 4 PA trajectory groups
  1st iteration 2nd iteration 3rd iteration 4th iteration
Group Highest function P-value Highest function P-value Highest function P-value Highest function P-value
Group 1 Quadratic <0.001 Quadratic <0.001 Quadratic <0.001 Quadratic <0.001
Group 2 Quadratic <0.001 Quadratic <0.001 Quadratic 0.14 Linear <0.001
Group 3 Quadratic <0.001 Quadratic 0.27 Linear 0.43 Constant <0.001
Group 4 Quadratic 0.72 Linear <0.001 Linear <0.001 Linear <0.001
  1. BIC Bayesian information criterion