Table 1

Yield of cancers entered into the pathology database for 1991/2 to 2000/1

	1991/2	1992/3	1993/4	1994/5	1995/6	1996/7	1997/8	1998/9	1999/00	2000/1	Overall % missing	2000/1 % missing
Prevalent round: women attending their first invitation or those attending an appointment having previously failed to attend (ages 50–64 years). Incident round: women attending subsequent invitations having previously attended a screening appointment within the past 5 years (ages 50–64 years).
Prevalent round
Women screened	87068	92606	64287	39014	30528	30245	32385	31321	32530	33613
Cancers detected	485	546	437	186	248	205	187	217	248	239
Invasive cancers detected	402	443	348	146	187	156	149	158	180	184
Invasive cancers <10 mm	85	100	101	33	49	36	42	39	39	39
Invasive cancers <15 mm	172	210	181	66	99	84	84	82	94	84
Invasive cancers ≥15 mm	213	205	134	77	83	70	63	71	83	96
Invasive cancers size unknown/missing	17	28	33	3	5	2	2	5	3	4	4.3	2.2
Invasive cancers grades 1 and 2	274	284	213	106	135	123	119	124	153	142
Invasive cancers grade 3	58	61	40	15	30	28	22	25	23	40
Invasive cancers not assessable/unknown/missing	70	98	95	25	22	5	8	9	4	2	14.4	1.1
Node negative invasive cancers	222	267	196	88	136	112	117	104	134	122
Node positive invasive cancers	108	89	64	44	38	41	30	39	41	54
Nodal status unknown/missing	72	87	88	14	13	3	2	15	5	8	13.0	4.3
Incident round
Women screened	64	8051	36133	56617	62524	64170	67127	66951	70681	82016
Cancers detected	0	26	136	309	303	344	334	381	445	525
Invasive cancers detected	0	22	112	253	228	276	278	309	357	410
Invasive cancers <10 mm	0	1	38	57	62	77	65	86	100	109
Invasive cancers <15 mm	0	8	69	132	123	160	144	166	192	234
Invasive cancers ≥15 mm	0	14	42	116	98	114	131	139	160	168
Invasive cancers size unknown/ missing	0	0	1	5	7	2	3	4	5	8	1.6	2.0
Invasive cancers grades 1 and 2	0	16	72	178	170	198	213	238	266	282
Invasive cancers grade 3	0	5	24	37	35	67	55	63	84	118
Invasive cancers not assessable/unknown/missing	0	1	16	38	23	11	10	8	7	10	5.5	2.4
Node negative invasive cancers	0	12	82	180	163	190	202	228	254	294
Node positive invasive cancers	0	6	20	59	53	72	66	73	87	101
Nodal status unknown/missing	0	4	10	14	12	14	10	8	16	15	4.6	3.7