Table 2. Primary-care investigations and primary-care interval, by cancer.

		All			Colorectal			Ovarian			Lung			Oesophageal			Pancreatic			Stomach
		N	Mean	Median	N	Mean	Median	N	Mean	Median	N	Mean	Median	N	Mean	Median	N	Mean	Median	N	Mean	Median
Any investigation in primary care	Noa	1838	17.4	0	967	18.6	0	105	7.5	0	294	17.1	1	293	15.5	0	81	15.5	0	98	24.9	0
	Yes	3198	41.2	16	1144	45.3	17	240	27.7	13	1200	38.9	16	220	40.7	21	246	38.8	13	148	55.3	22
Blood test	No	2996	26.3	4	1140	23.4	1	195	19.5	2	1058	32.6	11	350	19.4	1	122	23	0	131	32.7	2
	Yes	2040	41.6	15	971	44.4	16	150	24.1	13	436	39.5	17	163	41.2	21	205	39	12	115	55.2	21
Chest X-ray	No	3908	31.4	6	2070	33	6	327	21.1	7	464	31.9	7	494	25.9	4	314	31.5	7	239	42.8	12
	Yes	1128	36.2	16	41	36.3	12	18	29.2	15.5	1030	35.8	15	19	37	27	13	68.9	39	7	56.6	19
Ultrasound	No	4546	30.9	7	1979	31.8	5	186	14.4	2	1455	34.3	13	497	25.3	5	211	20.8	3	218	35.7	9
	Yes	490	47.7	20	132	50.8	21.5	159	29.9	14	39	44.3	22	16	56.8	33	116	55.3	21	28	101.5	57
CT/MRI	No	4928	31.9	8	2094	32.5	6	338	20.9	7	1420	33.6	12	511	26.3	6	320	33.2	7	245	43.4	13
	Yes	108	56.9	35	17	95.1	39	7	54.1	34	74	52.9	35	2	20.5	20.5	7	26	13	1	5	5
Endoscopy	No	4861	31.4	8	2022	31.1	5	341	21.7	7	1484	34.4	13	478	25.1	5	314	30.8	7	222	43.5	12
	Yes	175	63.1	20	89	76.7	20	4	7.5	7.5	10	56.4	40.5	35	43.2	15	13	86.7	49	24	40.5	19.5
Count of any of the above five investigations	0a	1952	19.5	0	1031	20	0	108	8.3	0	312	22.4	2	315	17.7	0	82	15.9	0	104	25.9	0.5
	1	2301	38.7	14	923	42.4	14	147	30.1	11	809	37.7	14	162	37.3	15	148	22.9	7.5	112	49.4	23
	2+	783	46.9	21	157	63.9	23	90	23.3	14	373	38.1	20	36	52.1	32.5	97	63	22	30	79.8	21

Abbreviations: CT=computed tomography; MRI=magnetic resonance tomography.

^aThe numbers in these two groups are slightly different as the first two rows include patients who have had any investigation in primary care, but the bottom three rows are counts based only on the five listed investigations (blood tests, chest X-rays, ultrasound, CT/MRI, or endoscopy).