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. Author manuscript; available in PMC: 2019 Feb 14.
Published in final edited form as: Arch Phys Med Rehabil. 2013 Jul 6;94(12):2486–2493. doi: 10.1016/j.apmr.2013.06.021

Table 2.

Variance estimates of the growth parameters

Growth Parameter Estimate P
Intercept 2.2722 <.0001
Linear change 0.04194 <.0001
Quadratic change 0.000101 <.0001