Table 4. Changes in Weight and Body Mass Index after Total Thyroidectomy in Patients with Thyroid Cancer, according to Radioactive Iodine Ablation Therapy Preparation Method.

Variable	Baseline	1-2 Years		3-4 Years
		After total thyroidectomy	P valuea	After total thyroidectomy	P valuea
Weight, kg
THW (n=506)
All patients	61.3±10.2	61.6±10.5	<0.01	62.0±1.5	<0.01
Male	74.0±10.5	74.3±10.8	0.26	74.8±10.4	0.17
Female	58.7±8.0	59.1±8.4	<0.01	59.2±8.1	<0.01
rhTSH (n=104)
All patients	60.9±8.9	60.9±9.0	0.91	60.9±8.8	0.55
Male	72.5±6.7	72.7±7.6	0.74	71.5±7.3	0.58
Female	58.1±6.9	58.0±6.8	0.96	57.8±6.6	0.71
BMI, kg/m2
THW (n=506)
All patients	24.2±3.2	24.3±3.3	<0.01	24.4±3.2	<0.01
Male	25.7±2.8	25.9±3.0	0.28	26.0±2.9	0.15
Female	23.8±3.2	24.0±3.3	<0.01	24.0±3.1	<0.01
rhTSH (n=104)
All patients	23.6±2.9	23.6±3.0	0.95	23.4±2.8	0.64
Male	24.9±2.2	24.9±2.4	0.76	24.7±2.6	0.55
Female	23.3±3.0	23.3±2.9	0.85	23.1±2.7	0.83

Values are expressed as mean±SD.

THW, thyroid hormone withdrawal; rhTSH, recombinant human thyroid stimulating hormone; BMI, body mass index.

^aPaired t test, comparison of weight or BMI after total thyroidectomy versus baseline.