Investigation

Total performed

Total abnormal (%)1

Discharged (%)2

Full blood count

312

116 (37.2)

124 (13.4)

Auto-antibodies3

269

21 (7.8)

109 (11.8)

Erythrocyte sedimentation rate

261

50 (19.2)

106 (11.5)

Allergen-specific IgE

222

84 (37.8)

45 (4.9)

Thyroid function test

185

11 (6.0)

72 (7.8)

Complement (C3, C4)

165

12 (7.3)

63 (6.8)

Liver profile

164

29 (17.7)

57 (6.2)

C reactive protein

152

34 (22.4)

64 (6.9)

Renal Profile

152

26 (17.1)

58 (6.3)

Serum IgE

112

68 (60.7)

35 (3.8)

Bone profile

98

13 (13.3)

38 (4.1)

Immunoglobulins

63

24 (38.1)

35 (3.8)

Serum electrophoresis

60

1 (1.7)

29 (3.1)

C1 esterase inhibitor

55

0 (0)

34 (3.7)

Rheumatoid factor

42

10 (23.8)

4 (0.4)

Lipid profile

20

6 (30)

8 (0.9)

Glucose

11

0 (0)

3 (0.3)

H. Pylori antibodies

7

3 (42.9)

2 (0.2)

Clotting screen

4

0 (0)

3 (0.3)

Skin prick tests4

1099

644 (58.6)

596 (64.6)

Chest X-ray

18

3 (16.7)

5 (0.5)

Drug challenge

87

15 (17.2)

-

Food challenge

22

2 (9.1)

-

CT scan sinuses

16

11 (68.8)

-

Lung function testing

13

4 (30.8)

2 (0.2)

1Any positive categorical result or any measurement outside the reference range
2Numbers of patients and percentages of the total 922 patients discharged after the first clinic appointment having had this test
3Includes thyroid antibodies, ANA and ANCA
4Variable total numbers of allergens
Table 7: Range and timing of investigations performed and proportions of abnormal results.
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