Table 3.

Linear Mixed-Effects Models for Baseline Characteristics Associated With the Rate of Change Rate in AL

	Univariate		Multivariate (Model 1)†		Multivariate (Model 2)‡
Characteristics	β (95% CI)	P Value*	β (95% CI)	P Value*	β (95% CI)	P Value*
Rate of change in AL
Age (years)
≥7 and <11						Reference
≥11 and <18	−0.093 (−0.118 to −0.068)	<0.001	−0.082 (−0.109 to −0.056)	<0.001	−0.080 (−0.106 to −0.055)	<0.001
Gender
Boys						Reference
Girls	−0.009 (−0.030 to 0.013)	0.420
Baseline SE (D)	−0.009 (−0.013 to −0.005)	<0.001	—	—	−0.006 (−0.010 to −0.001)	0.014
Baseline AL (mm)	0.008 (0.000 to 0.016)	0.045	0.005 (−0.003 to 0.013)	0.246	–	–
Baseline PM
0						Reference
1	0.086 (0.054 to 0.117)	<0.001	0.055 (0.021 to 0.088)	0.001	0.043 (0.010 to 0.076)	0.011

^* P was calculated using a linear mixed-effects regression model.

^†Multivariate Model 1: The covariates were age, gender, baseline AL, and baseline PM.

^‡Multivariate Model 2: The covariates were age, gender, baseline SE, and baseline PM.