英语语法分析

Result No significant difference was found in seropositivity rate among every group.

结果各组之间血清学无显著性差异。

Seropositivity rates for non-oncogenic or oncogenic HPV types did not differ between cases and controls.

病例组和对照组非致瘤型和致瘤型HPV的阳性率没有差异性。