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Table 2 Categorized results according to 4 classification criteria for normal: 1) basal TSH according to Innsbruck criteria (I-TSH), 2) TRH stimulated TSH levels (s-TSH), 3) basal TSH according to Zöphel (Z-TSH), 4) basal TSH according to Baloch (B-TSH). The figures in the table correspond to the percentage of cases from the total that fall within a specific category.

From: Diagnostic accuracy of basal TSH determinations based on the intravenous TRH stimulation test: An evaluation of 2570 tests and comparison with the literature

I-TSH % s-TSH % Z-TSH % B-TSH %
< 0.3 3,81 < 2,5 3,35 < 0.3 3,81 < 0.3 3,81
0.3 – 3.5 91,52 < 19,9 82,37 0.3 – 3.35 90,66 0.3 – 2.5 83,77
> 3.5 4,67 >= 20 14,28 > 3.35 5,53 > 2.5 12,41