Methods Two step clustering was used to cluster normal, low-grade squamous intraepithelial lesion, high-grade squamous intraepithelial lesion cervical cells with 51 characters.

• 方法对正常、低度鳞状上皮内病变和高度鳞状上皮内病变宫颈细胞的51个特征参数采用两步骤聚类分析：(1)将样品预聚类成小的子类；