A QUADRATIC EQUATION ADEQUATELY DESCRIBES THE CUMULATIVE FOOD-INTAKE CURVE IN MAN
A QUADRATIC EQUATION ADEQUATELY DESCRIBES THE CUMULATIVE FOOD-INTAKE CURVE IN MAN
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DOI：
10.1016/s0195-6663(82)80022-6
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发表时间：
1982-01-01
期刊：
影响因子：
5.4
通讯作者：
BECKER, E
中科院分区：
文献类型：
--
作者：
KISSILEFF, HR;THORNTON, J;BECKER, E
一个二次方程充分描述了非肥胖男性和女性在单道菜餐中的累积食物摄入量曲线。男性的膳食摄入量以及方程的线性和二次系数的绝对值都大于女性。二次系数是负的。这些系数有一个简单的物理解释。线性系数是初始进食速率，二次系数是减速速率的一半（绝对值）。因此，我们可以说，在这项研究中使用的测试饮食中，男性表现出更高的初始进食速度，但减速速度也比女性快。摄取量和累积摄取量曲线系数不受视觉提示的影响。研究人员认为，这与其他研究的不同之处在于，在本研究中，水库是宽的，而不是窄的，而且视觉线索只有在引起对摄取量的感知快速变化时才会控制摄取量。最后，与实验室外相比，实验室内的摄入量变化较小，但在实验室外，摄入量的性别差异仍然存在。有人建议，二次方程可以用于表征导致用餐过程中进食速度变化的因素，并且这种变化可能在评估饮食失调方面具有诊断价值。
A quadratic equation adequately describes the cumulative food intake curve in single-course meals in non-obese men and women. Intake of the meal and both the linear and quadratic coefficients of the equation were larger in absolute value in men than in women. The quadratic coefficient was negative. The coefficients have a simple physical interpretation. The linear coefficient is the initial rate of eating, and the quadratic is half the rate of deceleration (in absolute value). We can therefore say that men exhibit a higher initial rate of eating but also decelerate faster than women, on the test diet used in this study. There were no differences in intake or the coefficients of the cumulative intake curve owing to visual cues. It is suggested that this difference from other studies was because, in this study, the reservoir was wide, not narrow, and because visual cues operate to control intake only when they induce rapid changes in perception of the amount consumed. Finally, intake was less variable in the laboratory than it was outside the laboratory, but the sex difference in intake persisted outside the laboratory. It is suggested that the quadratic equation could be useful for characterizing factors that lead to changes in the rate of eating during the course of a meal and that such changes might have diagnositic value in assessing eating disorders.