FIGURE E-2 Calcium retention as a function of intake in young adults aged 18 –30 years as compiled by Matkovic and Heaney (1992). The equation which describes the nonlinear regression model of Jackman et al. (1997) and applied as depicted in this figure to the balance study data of Matkovic and Heaney (1992) is Y = −133.79 + 290.16 eL/(1 + eL), where L = −3.15 + 0.0040 (intake).

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