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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Psychoneuroendocrinology. 2013 Jul 4;38(11):10.1016/j.psyneuen.2013.06.010. doi: 10.1016/j.psyneuen.2013.06.010

Figure 1.

Figure 1

Model-predicted mean cortisol trajectory in the sample, based on three alternate growth curve specifications: linear spline, quadratic spline, and piecewise linear-cubic.