Objective: To investigate the methods of case-mix in small samples.
目的：探讨建立小样本情况下病例组合模型的意义与模型求解方法。
2
In this case, now you mix them together, relative to the ideal solution where there are no interactions, now they want to be together.
在这种情况，现在你把它们混合在一起，相对于没有，相互作用的理想溶液，现在它们想要在一起。
3
Patients whose visual acuity (VA) before surgery was< 6/60 in the better eye comprised 47% of the total casemix in poorly developed countries and 1% in developed countries (P < 0.001).