. 2023 Jun 19;67(6):e000640. doi: 10.20945/2359-3997000000640

Table 4. Crude and adjusted logistic regression between psoriasis and thyroid function variables, after exclusion of patients reporting cardiovascular disease, diabetes and inflammatory diseases at baseline (n = 7608; psoriasis n = 201).

		Crude	Model 2
TSH
	lnTSH, per unit (mIU/L)	1.42 (1.09-1.84)^*	1.40 (1.07-1.83)^*
	1^st quintile	0.63 (0.39-1.01)	0.62 (0.38-1.00)^*
	2^nd quintile	0.82 (0.53-1.28)	0.82 (0.53-1.27)
	3^rd quintile	Ref	Ref
	4^th quintile	0.94 (0.62-1.43)	0.90 (0.59-1.38)
	5^th quintile	1.06 (0.70-1.60)	1.03 (0.68-1.56)
FT4
	lnFT4, per unit (ng/dL)	1.36 (0.49-3.77)	1.19 (0.43-3.29)
	1^st quintile	1.20 (0.76-1.90)	1.18 (0.74-1.87)
	2^nd quintile	1.13 (0.72-1.78)	1.11 (0.70-1.75)
	3^rd quintile	Ref	Ref
	4^th quintile	0.97 (0.60-1.56)	0.88 (0.54-1.43)
	5^th quintile	1.39 (0.89-2.17)	1.30 (0.83-2.04)
FT3
	lnFT3, per unit (ng/dL)	0.46 (0.15-1.45)	0.44 (0.13-1.50)
	1^st quintile	1.64 (1.04-2.58)^*	1.71 (1.07-2.73)^*
	2^nd quintile	1.56 (1.00-2.43)	1.60 (1.02-2.51)^*
	3^rd quintile	Ref	Ref
	4^th quintile	0.92 (0.56-1.51)	0.92 (0.56-1.52)
	5^th quintile	1.37 (0.89-2.11)	1.40 (0.90-2.18)
TPOAb
	Negative	Ref	Ref
	Positive (≥ 34 IU/mL)	0.69 (0.39-1.25)	0.72 (0.40-1.30)
Subclinical hypothyroidism
	No	Ref	Ref
	Yes	1.37 (0.91-2.05)	1.36 (0.90-2.06)

p < 0.05;

^**

p < 0.01.

Ref: reference category; ln: natural log transformed; TSH: thyroid-stimulating hormone; FT4: free thyroxine; FT3: free triiodothyronine; TPOAb: thyroid peroxidase antibodies. Model 2 was adjusted for sex, age, race/ethnicity, education, and smoking.