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. 2017 Dec 19;68(666):e63–e72. doi: 10.3399/bjgp17X694169

Table 6.

Number of primary care-led investigations ordered by the GP as part of the diagnostic assessment prior to referral

Investigation group (N= 16 762, excluding not knowns) Percentage of patients investigated by test typea (N= 16 762)


No investigations,bn (%) Not known, n Blood tests, n (%) Urinary tests, n (%) Imaging, n (%) Endoscopy, n (%) Other, n (%)
Total 9160 (54.6) 280 5795 (34.6) 212 (1.3) 3289 (19.6) 267 (1.6) 446 (2.7)

Male 3662 (43.7) 156 3773 (45.0) 152 (1.8) 1780 (21.2) 139 (1.7) 250 (3.0)

Female 5498 (65.7) 124 2022 (24.1) 60 (0.7) 1509 (18.0) 128 (1.5) 196 (2.3)

Age group, years
  0–24 131 (68.6) 7 38 (19.9) 0 (0.0) 31 (16.2) 1 (0.5) 6 (3.1)
  25–49 1105 (66.4) 40 353 (21.2) 12 (0.7) 325 (19.5) 23 (1.4) 47 (2.8)
  50–64 2362 (57.8) 60 1275 (31.2) 44 (1.1) 781 (19.1) 77 (1.9) 101 (2.5)
  65–74 2465 (51.1) 52 1820 (37.7) 66 (1.4) 997 (20.7) 73 (1.5) 132 (2.7)
  75–84 2079 (50.3) 83 1602 (38.8) 67 (1.6) 848 (20.5) 78 (1.9) 118 (2.9)
  ≥85 1018 (54.5) 38 707 (37.9) 23 (1.2) 307 (16.4) 15 (0.8) 42 (2.2)

Cancer site
  Bladder 208 (43.1) 7 171 (35.4) 61 (12.6) 60 (12.4) 4 (0.8) 58 (12.0)
  Brain 192 (74.7) 8 50 (19.5) 4 (1.6) 24 (9.3) 1 (0.4) 3 (1.2)
  Breast 2602 (96.8) 26 53 (2.0) 1 (0.0) 50 (1.9) 0 (0.0) 7 (0.3)
  Cancer of unknown primary 190 (49.0) 12 164 (42.3) 0 (0.0) 97 (25.0) 6 (1.5) 8 (2.1)
  Colon 624 (47.9) 16 621 (47.6) 7 (0.5) 168 (12.9) 52 (4.0) 31 (2.4)
  Endometrial 247 (62.7) 6 72 (18.3) 3 (0.8) 82 (20.8) 4 (1.0) 25 (6.3)
  Leukaemia 182 (40.0) 15 266 (58.5) 2 (0.4) 36 (7.9) 3 (0.7) 2 (0.4)
  Liver 121 (44.8) 2 122 (45.2) 4 (1.5) 80 (29.6) 8 (3.0) 2 (0.7)
  Lung 844 (40.1) 29 602 (28.6) 5 (0.2) 1100 (52.3) 16 (0.8) 50 (2.4)
  Lymphoma 305 (42.4) 19 324 (45.0) 6 (0.8) 247 (34.3) 12 (1.7) 16 (2.2)
  Melanoma 779 (94.3) 10 9 (1.1) 0 (0.0) 7 (0.8) 0 (0.0) 37 (4.5)
  Multiple myeloma 89 (33.7) 8 162 (61.4) 1 (0.4) 72 (27.3) 4 (1.5) 10 (3.8)
  Oesophageal 239 (54.4) 8 162 (36.9) 0 (0.0) 55 (12.5) 37 (8.4) 10 (2.3)
  Oral/oropharyngeal 197 (75.8) 8 49 (18.8) 1 (0.4) 27 (10.4) 1 (0.4) 5 (1.9)
  Other 839 (54.1) 30 395 (25.5) 15 (1.0) 452 (29.1) 26 (1.7) 61 (3.9)
  Ovarian 100 (30.9) 8 170 (52.5) 6 (1.9) 159 (49.1) 4 (1.2) 11 (3.4)
  Pancreatic 145 (32.2) 10 267 (59.3) 6 (1.3) 166 (36.9) 23 (5.1) 9 (2.0)
  Prostate 503 (24.0) 33 1555 (74.2) 70 (3.3) 166 (7.9) 4 (0.2) 44 (2.1)
  Rectal 360 (56.2) 7 260 (40.6) 2 (0.3) 27 (4.2) 28 (4.4) 19 (3.0)
  Renal 262 (48.2) 13 174 (32.0) 17 (3.1) 175 (32.2) 5 (0.9) 32 (5.9)
  Stomach 132 (43.6) 5 147 (48.5) 1 (0.3) 39 (12.9) 29 (9.6) 6 (2.0)
a

Patients could have had >1 investigation. Each investigation group has been counted once, therefore multiple blood tests are counted as blood test x1.

b

Number of investigations include not applicable and screening patients. Percentage values relate to observations with non-missing information (that is, excluding ‘not-known’). This is to prevent under-reporting of the proportion of the known categories by assuming that the not-known cases are missing at random and therefore evenly distributed among the known groups.