Table 3.

Association of metabolic syndrome or its components with the risk of thyroid cancer in female participants.

Characteristics	Number of Subjects	Number of Subjects with Thyroid Cancer	Incidence Per 10,000 Person-Years	RR (95% CI) *	p Value
Metabolic syndrome					<0.001
No	1,790,507	29,095	19.6	Reference
Yes	398,970	7062	21.3	1.16 (1.13–1.19)
Metabolic syndrome components
Abdominal obesity					<0.001
No	1,837,100	2,9855	19.6	Reference
Yes	352,377	6302	21.5	1.15 (1.12–1.18)
Elevated blood pressure					<0.001
No	1,201,990	19,146	19.2	Reference
Yes	987,487	17,011	20.7	1.17 (1.15–1.20)
Hyperglycaemia					0.008
No	1,622,855	26,832	19.8	Reference
Yes	566,622	9325	19.9	1.03 (1.01–1.06)
Hypertriglyceridemia					<0.001
No	1,733,640	28,499	19.8	Reference
Yes	455,837	7658	20.2	1.06 (1.04–1.091)
Low HDL-cholesterol					<0.001
No	1,615,362	25,599	19.1	Reference
Yes	574,115	10,558	22.1	1.19 (1.16–1.22)

RR, relative risk; CI, confidence interval; HDL, high-density lipoprotein. * Adjusted for age and body mass index.