Table 2.

Level of miRNAs in study groups.

miRNAs	Control (Copies/µL) n = 21	PTC (Copies/µL) n = 49
Let-7a	55 ± 69 (25)	224 ± 776 (62) *
Let-7c	38 ± 47 (21)	100 ± 115 (51) *
Let-7d	16 ± 25 (5)	58 ± 159 (15) *
Let-7f	18 ± 23 (10)	65 ± 185 (19) *
Let-7i	59 ± 64 (34)	212 ± 483 (67)

The data are expressed as mean ± standard deviation (median). * Statistically significant data corresponding control, p ≤ 0.05. Statistically significant differences were determined by Mann–Whitney test. PTC: papillary thyroid carcinoma.