What Happens in a 5-Year Follow-Up of Benign Thyroid Nodules

Table 1

Characteristics of study population.

	Baseline	12 mo	24 mo	36 mo	48 mo	60 mo
Number of patients	249	249	247	245	245	243
F/M	209/40	209/40	207/40	205/40	205/40	203/40	<0.01
Age (yr)	54.7 ± 12.7
TSH (mIU/L)	1.5 ± 0.9	1.5 ± 0.9	1.5 ± 1.5	1.4 ± 0.7	1.5 ± 0.9	1.5 ± 0.9	ns
UNG/MNG	113/136	113/136	113/134	113/132	113/132	113/130	ns
Number of nodules	2 ± 1.2	2 ± 1.3	2.1 ± 1.3	2.1 ± 1.3	2.3 ± 1.3	2.1 ± 1.2	ns
Diameter of major nodule (mm)	15.6 ± 6.4	16.3 ± 6.9	16.8 ± 6.4	16.4 ± 7.0	17 ± 7.5	16.7 ± 7.4	ns