Changes in Serum TSH and T4 Levels after Switching the Levothyroxine Administration Time from before Breakfast to before Dinner

Table 2

Changes to the serum levels of TSH during the study (all data are reported as mean ± SD).

Age group	Serum TSH (μIU/mL)
	BB^1	BD^2	Difference	value
≤40 years ()	2.26 ± 1.19	3.52 ± 1.59	1.26 ± 0.4	0.00
>40 years ()	1.55 ± 1.14	2.99 ± 1.98	1.44 ± 0.84	0.02
Total population ()	2.03 ± 1.22	3.35 ± 1.73	1.47 ± 0.51	0.00

Before breakfast, ²before dinner.