术语“正规离差”的详细信息

英译术语:

normal deviate

汉语语境:

根据阈值模型理论，推导一个计算阈值性状中患者各级亲属的预期发病率的公式。 公式为 X_r=X_g-rh~2a_g 式中，X=阈值与平均的正态离差；a=患者与群体平均的平均离差；h~2=遗传率；r=亲缘系数；下标g指一般群体；下标r指患者亲属。 与Falconer公式和Edwards近似公式相比较，无论在计算结果的精确度上，或者使用简便上均有一定的好处。

英语语境:

There is a formula for estimating the expected incidence in the relatives of affected individuals was derived on the basis of the threshold model. The formula is: (X4)=Xg-rh2ag where r=coeffecient of relationship; h2=heritability;X=deviation of threshold from mean, i.e., the normal deviate; a=mean deviation of affected individuals from the population mean; subscript g refers to the general population; and subscript refers to the relatives in comparison with Falconer's formula and Edwards approximate formula.