Preventing cervical cancer using HPV self-sampling: direct mailing of test-kits increases screening participation more than timely opt-in procedures - a randomized controlled trial

Table 4 Yield of CIN2+ lesions in the intervention and control groups

	Directly mailed group Invited = 3265			Opt-in group Invited = 3264			Control group Invited = 3262
	Self-sampling	Cytology	Total	Self-sampling	Cytology	Total	Cytology
	n	n	n	n	n	n	n
Number screened	635	607	1242	270	739	1009	823
CIN2+ detected	13	6	19	5	8	13	10^a
CIN2+ per 1000 invited (95% CI)	4.0 (2.1–6.8)	1.8 (0.7–4.0)	5.8 (3.5–9.1)	1.5 (0.5–3.6)	2.5 (1.1–4.8)	4.0 (2.1–6.8)	3.1 (1.5–5.6)
CIN2+ per 1000 screened (95% CI)	20.5 (10.9–34.8)	9.9 (3.6–21.3)	15.3 (9.2–23.8)	18.5 (6.0–42.7)	10.8 (4.7–21.2)	12.9 (6.9–21.9)	12.2 (5.8–22.2)

ISSN: 1471-2407