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

Table 2. Crude and adjusted logistic regression between psoriasis and thyroid function variables (n = 9649).

		Crude	Model 1	Model 2
TSH
	lnTSH, per unit (mIU/L)	1.27 (1.02-1.58)^*	1.22 (0.97-1.52)	1.24 (0.99-1.56)
	1^st quintile	0.68 (0.45-1.01)	0.71 (0.47-1.07)	0.69 (0.46-1.04)
	2^nd quintile	0.84 (0.57-1.22)	0.86 (0.59-1.26)	0.85 (0.58-1.25)
	3^rd quintile	Ref	Ref	Ref
	4^th quintile	1.06 (0.74-1.52)	1.04 (0.72-1.49)	1.04 (0.73-1.50)
	5^th quintile	0.92 (0.64-1.34)	0.90 (0.62-1.31)	0.91 (0.63-1.33)
FT4
	lnFT4, per unit (ng/dL)	1.12 (0.47-2.67)	1.00 (0.42-2.41)	0.99 (0.41-2.37)
	1^st quintile	1.19 (0.78-1.79)	1.19 (0.79-1.80)	1.17 (0.77-1.77)
	2^nd quintile	1.32 (0.89-1.96)	1.32 (0.89-1.96)	1.31 (0.88-1.94)
	3^rd quintile	Ref	Ref	Ref
	4^th quintile	1.06 (0.70-1.60)	1.01 (0.66-1.53)	1.00 (0.65-1.51)
	5^th quintile	1.35 (0.91-2.00)	1.29 (0.87-1.92)	1.27 (0.86-1.88)
FT3
	lnFT3, per unit (ng/dL)	0.55 (0.21-1.45)	0.60 (0.22-1.69)	0.58 (0.21-1.62)
	1^st quintile	1.61 (1.09-2.38)^*	1.65 (1.11-2.46)^*	1.66 (1.11-2.46)^*
	2^nd quintile	1.46 (0.99-2.15)	1.47 (0.99-2.18)	1.47 (0.99-2.17)
	3^rd quintile	Ref	Ref	Ref
	4^th quintile	0.98 (0.64-1.50)	1.00 (0.65-1.54)	1.00 (0.65-1.53)
	5^th quintile	1.40 (0.96-2.04)	1.48 (1.01-2.17)^*	1.46 (0.99-2.14)
TPOAb
	Negative	Ref	Ref	Ref
	Positive (≥34 IU/mL)	0.75 (0.45-1.22)	0.73 (0.44-1.22)	0.73 (0.44-1.23)
Subclinical hypothyroidism
	No	Ref	Ref	Ref
	Yes	1.11 (0.77-1.61)	1.10 (0.76-1.60)	1.12 (0.77-1.63)

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. Adjustments: Model 1: sex, age, race/ethnicity, education; Model 2: model 1+ smoking.