IGF-1

Alternative names, keywords

Insulin-like growth factor 1

Samples required

● Clotted blood (gold cap, 5 mL tube). Smaller tubes are available for paediatric samples.

Test indications

Test information

_{Please note this test is not currently UKAS accredited.}

Factors affecting test performance/ results

In rare cases, interference due to extremely high titres of antibodies to analyte-specific antibodies, streptavidin or ruthenium can occur.

Results should always be assessed in conjunction with the patient’s medical history, clinical examination and other findings.

Reference range

Age (years)	Male (nmol/L)	Female (nmol/L)
4 months	1.6 - 12.3	1.8 - 11.3
6 months	1.5 - 12.4	2.0 - 12.1
1	1.5 - 12.6	2.4 - 13.6
2	1.8 - 13.6	3.4 - 16.8
3	2.5 - 15.2	4.5 - 20.3
4	3.5 - 17.6	5.7 - 24.2
5	4.8 - 20.4	6.9 - 28.3
6	6.2 - 24.1	8.3 - 32.8
7	7.5 - 28.3	9.8 - 37.5
8	8.8 - 33.3	11.4 - 42.4
9	10.1 - 38.8	13.1 - 47.6
10	11.2 - 44.9	14.7 - 52.1
11	12.3 - 51.4	16.1 - 55.9
12	13.2 - 56.9	17.3 - 59.1
13	14.1 - 61.2	18.3 - 61.3
14	15.1 - 64.1	19.1 - 62.9
15	15.7 - 65.6	19.8 - 63.5
16	16.4 - 65.9	20.2 - 63.5
17	16.9 - 64.8	20.4 - 62.7
18	17.3 - 62.4	20.4 - 61.0
19	17.6 - 59.0	20.3 - 58.8
20	17.8 - 55.2	19.9 - 56.2
21	17.9 - 51.6	19.4 - 53.7
22	17.9 - 48.5	18.7 - 51.4
23	17.8 - 45.6	18.1 - 49.1
24	17.7 - 43.0	17.6 - 47.0
25	17.3 - 40.6	17.0 - 44.9
26	17.0 - 38.6	16.5 - 43.1
27	16.8 - 36.9	16.0 - 41.3
28	16.4 - 35.5	15.5 - 39.7
29	16.1 - 34.5	15.1 - 38.3
30	15.7 - 33.7	14.7 - 36.8
31	15.5 - 33.1	14.3 - 35.5
32	15.2 - 32.8	14.0 - 34.5
33	14.9 - 32.4	13.6 - 33.4
34	14.5 - 32.0	13.4 - 32.5
35	14.3 - 31.7	13.1 - 31.7
36	14.0 - 31.3	12.9 - 31.2
37	13.8 - 30.9	12.6 - 30.7
38	13.5 - 30.7	12.4 - 30.3
39	13.2 - 30.3	12.2 - 29.9
40	12.9 - 30.0	12.0 - 29.7
41	12.6 - 29.6	11.8 - 29.5
42	12.4 - 29.2	11.5 - 29.3
43	12.1 - 29.0	11.3 - 29.1
44	11.9 - 28.6	11.1 - 29.0
45	11.6 - 28.3	10.9 - 28.8
46	11.3 - 28.0	10.7 - 28.7
47	11.1 - 27.6	10.5 - 28.6
48	10.8 - 27.4	10.3 - 28.6
49	10.6 - 27.1	10.1 - 28.4
50	10.3 - 26.9	9.9 - 28.2
51	10.0 - 26.6	9.7 - 28.0
52	9.8 - 26.3	9.5 - 27.8
53	9.5 - 26.2	9.4 - 27.5
54	9.3 - 25.9	9.2 - 27.1
55	9.0 - 25.7	9.0 - 26.7
56	8.8 - 25.5	8.8 - 26.3
57	8.6 - 25.4	8.6 - 25.9
58	8.3 - 25.3	8.5 - 25.4
59	8.2 - 25.2	8.3 - 24.9
60	8.0 - 25.0	8.1 - 24.4
61	7.9 - 24.9	8.0 - 23.8
62	7.8 - 24.8	7.8 - 23.4
63	7.7 - 24.6	7.6 - 23.1
64	7.6 - 24.6	7.5 - 22.7
65	7.5 - 24.5	7.4 - 22.3
66	7.4 - 24.4	7.3 - 22.0
67	7.4 - 24.4	7.2 - 21.7
68	7.3 - 24.2	7.1 - 21.5
69	7.2 - 24.2	7.0 - 21.4
70	7.2 - 24.2	7.0 - 21.2
71	7.1 - 24.1	7.0 - 21.1
72	7.0 - 24.1	7.0 - 21.0
73	6.9 - 24.1	7.0 - 21.0
74	6.9 - 24.1	7.0 - 21.0
75	6.8 - 24.1	7.0 - 21.0
76	6.7 - 24.1	7.0 - 21.1
77	6.6 - 24.1	7.1 - 21.2
78	6.6 - 24.1	7.1 - 21.4
79	6.5 - 24.1	7.2 - 21.5
80 and over		7.2 - 21.7

_{Source: Roche Elecsys IGF-1 kit insert, 2021-12, V 4.0}

Turnaround time

3 days

Enquiries

Biochemistry (Automation)

Test A-Z Index.