在HPV检测组较低的死亡率是由于降低了晚期病变的筛出率，而且由于对更多的癌前病变的早期发现和治疗从而更有效的阻止了侵袭性癌的发生。

The lower death rate in the HPV-testing group is due to lower advanced disease and higher prevented invasive cancers due to early detection and treatment of more 'real' precursor lesions.

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侵袭性葡萄胎非常罕见，但却是绒癌的一种癌前病变。

Invasive molar pregnancy is extremely rare, but is one of te pre-cancer stage for choriocarcinoma .

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这种癌前病变的早期观察和治疗使得晚期癌症发生率降低，而且在HPV检测组的侵袭性癌和宫颈癌死亡数都明显减少。

The early detection and treatment of such lesions resulted in a lower rate of advanced cancers, and a lower number of invasive cancers and cervical cancer deaths in the HPV-testing group.

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