Table 2. The number of cervical screening examinations and colposcopies required for detecting CIN2+/CIN3+.

Strategy		No. of total detected cases	No. of detected cases in 1 yr			More than second round	No. of clposcopies	No. of colposcopies to detect 1 case (No.*)
			Total	Baseline round	Follow-up 1-yr round
CIN2+
	Strategy I	1,088	1,057	991†	66	31	2,661†	2.69
	Strategy II	1,088	924	903	21	164	2,112	2.34
	Strategy III	1,088	1,035	990†	45	53	2,725†,‡	2.75
CIN3+
	Strategy I	739	724	701†	23	15	2,661†	3.80
	Strategy II	739	667	656	11	72	2,112	3.22
	Strategy III	739	712	700†	12	27	2,725†,‡	3.89

CIN2+, cervical intraepithelial neoplasia grade 2 or worse; CIN3+, cervical intraepithelial neoplasia grade 3 or worse.

^*Colposcopies performed/case identified; ^†Strategy I and strategy III were significantly higher than strategy II (p<0.05). ^‡Strategy I was similar to strategy III (p>0.05).