Table 3.

Detection of cervical disease using different screening strategies and the number of coloposcopies that each strategy requires

Screening strategies	Total	No. of detected cases at primary round	No. of detected cases at follow-up round	No. lost to follow-up at primary round	No. of colposcopies at primary round	No. of colposcopies to detect one case at primary round
CIN2+ endpoint
1	276	239	37	52	655	2.74
2	276	239	37	52	655	2.74
3	276	223	53	51	525	2.35
4	276	247	29	262	959	3.88
CIN3+ endpoint
1	197	174	23	52	655	3.76
2	197	174	23	52	655	3.76
3	197	161	36	51	525	3.26
4	197	177	20	262	959	5.42

Abbreviation: CIN, cervical intraepithelial neoplasia.