The Association between Type 2 Diabetes Mellitus and Thyroid Cancer

Table 2

T2DM duration and T2DM medication use according to the presence or absence of thyroid cancer.

	No thyroid cancer (); Mean ± SD or N (%)	Thyroid cancer (); Mean ± SD or N (%)	value^a
T2DM duration (years)	5.8 ± 7.9	5.4 ± 4.1	0.720
T2DM duration			0.049
<1 year	18 (26.9)	4 (8.0)
1–3 years	16 (23.9)	12 (24.0)
3–5 years	6 (9.0)	9 (18.0)
≥5 years	27 (40.3)	25 (50.0)
T2DM duration			0.139
No T2DM	248 (83.9)	365 (88.0)	0.296^b
<5 years	40 (9.6)	25 (6.0)	0.049^c
≥5 years	27 (6.5)	25 (6.0)	0.664^d
T2DM medication			0.003
No	34 (50.8)	12 (24.0)
Yes	33 (49.3)	38 (76.0)

SD: standard deviation; T2DM: type 2 diabetes mellitus. ^a value from a t-test for continuous outcomes or χ² test for binary outcomes, comparing differences between any 2 study groups. ^b value from a χ² test comparing a difference between T2DM duration <5 years and ≥5 years. ^c value from a χ² test comparing a difference between no T2DM and T2DM duration <5 years. ^d value from a χ² test comparing a difference between no T2DM and T2DM duration ≥5 years.