Table 1.

Baseline pre-operative characteristics of 143 patients before hemithyroidectomy for low-risk DTC. Values are presented as median and interquartile ranges. Mann–Whitney U test was used to analyze statistical significance (never vs ever on LT4).

Characteristics	All		Never LT4		Ever LT4		P values
	n	Values	n	Values	n	Values
Age, years	143	53 (43–65)	99	53 (43–65)	44	51 (43.5–64)	0.73
Females, n (%)	143	115 (80)		77 (78)		38 (86)	0.23
BMI	143	26.0 (22.8–29.4)	99	26.0 (23.3–29.1)	44	25.3 (21.7–30.7)	0.78
Pre-HT TSH (U/mL)	116	1.29 (0.81–1.91)	78	1.12 (0.73–1.61)	38	1.89 (1.28–2.64)	<0.0001
TSH, mIU/L
<2	90	1.10 (0.73–1.50)	70	1.04 (0.72–1.43)	20	1.28 (0.87–1.58)	0.004
2–4	26	2.62 (2.33–2.98)	8	2.49 (2.30–2.80)	18	2.72 (2.45–3.29)	0.004
>4	0	-	0	-		-
FT4
pmol/L	59	15.3 (13.7–17.5)	37	15.5 (14.9–18.0)	22	14.7 (13.6–16.1)	0.08
ng/dL	59	1.19 (1.06–1.36)	37	1.20 (1.16–1.40)	22	1.14 (1.06–1.25)	0.08

LT4, levothyroxine; BMI, body mass index; TSH, thyroid-stimulating hormone; FT4, free thyroxine; DTC, differentiated thyroid cancer.