Safety and Efficacy of Low-Level Laser Therapy in Autoimmune Thyroiditis: Long-Term Follow-Up Study

Table 3

Summary of the statistical analysis for the study groups (M2).

Secondary outcomes	Preintervention (M0)		value	Postintervention (M2)		value
	Group L (); Mean ± standard deviation	Group P (); Mean ± standard deviation		Group L (); Mean ± standard deviation	Group P (); Mean ± standard deviation
LT4 dose (μg/day)	93.48 ± 44.09	90.00 ± 40.88	0.791	94.50 ± 44.45	141.72 ± 52.62	0.003
LT4 dose (μg/kg/day)	1.32 ± 0.60	1.25 ± 0.55	0.693	1.31 ± 0.72	1.86 ± 0.53	0.010
Total T3 (ng/mL)	124.04 ± 21.21	120.35 ± 20.02	0.563	107.25 ± 17.77	104.17 ± 18.66	0.589
Total T4 (μg/dL)	9.92 ± 1.60	9.73 ± 1.95	0.738	10.27 ± 1.72	10.15 ± 2.33	0.848
Free T4 (ng/dL)	1.03 ± 0.15	1.03 ± 0.20	0.997	1.28 ± 0.21	1.28 ± 0.33	0.955
TSH (μIU/mL)	2.65 ± 1.36	2.88 ± 1.41	0.579	1.82 ± 1.13	2.25 ± 1.91	0.397
Thyroid volume (cm^3)	14.24 ± 9.78	16.32 ± 23.65	0.702	11.03 ± 5.97	14.80 ± 19.83	0.375
Mean of left and right ITA-PSV (cm/s)	28.34 ± 10.95	27.31 ± 8.74	0.738	20.23 ± 6.68	17.60 ± 7.07	0.220
Mean of left and right ITA-RI mean	0.56 ± 0.07	0.57 ± 0.07	0.423	0.60 ± 0.08	0.64 ± 0.08	0.351

-test for independent samples; .