Table 4.

Multivariate binary logistic regression analysis: dependent variable is thyroid nodule in 2012, and independent variables are age, sex, and the D values of SBP, DBP, WC, FBG, TG, and HDL (method: forward stepwise LR or backward stepwise LR).

	β	P value	RR	95% C.I. for RR
Gender	0.055	0.000	1.057	1.040	1.073
D value of TG	0.001	0.035	1.001	1.000	1.002
Constant	−2.759	0.000	0.063

D value of TG was calculated as the TG value in 2012 minus the TG value in 2009, and the differences of SBP, DBP, WC, FBG, and HDL were calculated in the same way. The results of forward stepwise LR and backward stepwise LR were absolutely consistent.