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Table 2 Results of TSH dilution test performed on a day prior to LT4 absorption test

From: Adequate timing and constant supervision are the keys for successful implementation of levothyroxine or levothyroxine/paracetamol absorption test

TSH sample dilution

TSH [μIU/ml]

TSH [μIU/ml] after recalculation

No dilution

289.3

289.3

1:4

72.8

291.2

1:16

19.7

315.2

1.32

10.1

323.2