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. Author manuscript; available in PMC: 2023 Jul 1.
Published in final edited form as: Acad Pediatr. 2021 Dec 1;22(5):769–776. doi: 10.1016/j.acap.2021.11.015

TABLE 2.

Comparison of Models With and Without BMI Trajectory Classes Predicting Age 15 Health Outcomes

Model Fit by Age 15 Health Outcome Without Trajectory Classes With Trajectory Classes Improvement
BMI Percentile
 R2 0.18 0.50 170%
 AIC 12.06 −373.70 −361.64
Overweight
 Tjur’s R2 0.12 0.42 250%
 AIC 908.73 648.57 −260.16
Obesity
 Tjur’s R2 0.12 0.31 158%
 AIC 611.92 463.22 −148.70
Waist Circumference
 R2 0.22 0.44 100%
 AIC 5988.50 5746.70 −241.80
Elevated or Prehypertensive Blood Pressure
 Tjur’s R2 0.12 0.18 50%
 AIC 876.55 822.81 −53.74

Note. Increases in R2 indicate increase in percent variance explained; decreases in AIC indicate improvement in fit. Tjur’s R2, the Coefficient of Discrimination, is read as a pseudo-R2 for use with binary outcomes.