Table 1.

Results of annual incidence screens performed in USS group.

Annual Incidence Screens		Women Years
No. of Level 1 Screens *		280,534 (100)
	Normal Scan	262,227 (93.5)
	Unsatisfactory Scan	8235 (2.9)
	Abnormal Scan	10,072 (3.6)
No. who Underwent Repeat Level 1 Screen †		7695 (2.7)
	Returned to annual screening	7485 (97.3)
	Referred for Level 2 screen	210 (2.7)
No. Who Underwent Level 2 Screen †		10,060 (3.6)
	Returned to annual screening	4591 (45.6)
	Referred for clinical assessment	5299 (52.7)
	Referred for Repeat Level 2 screen	170 (1.7)
No. Who Underwent Repeat Level 2 Screen †		160 (0.1)
	Returned to annual screening	92 (57.5)
	Referred for clinical assessment	68 (42.5)
No. Referred for Clinical Assessment †,‡		5495 (2.0)
No. Who Underwent Screen Positive Surgery †		960 (0.3)
Surgical Approach
	Diagnostic laparoscopy §	31 (3.2)
	Operative laparoscopy	628 (65.4)
	Combined laparoscopy and laparotomy	69 (7.2)
	Laparotomy	214 (22.3)
	Vaginal hysterectomy with BSO	3 (0.3)
	Imaging guided cytology/biopsy	14 (1.5)
	Missing data	1 (0.1)

Data is number (%). * Denominators for header rows are numbers of annual screens. Denominators for subsequent rows are number who underwent specific screen. † Difference in numbers between those recommended tests and number who underwent test is due to non-compliance. ‡ 123 women were clinically assessed following a level 1 screen. § Seven women went on to have laparotomy as a second procedure.