Table 4.

Cross sectional association between thyroid function tests and atrial fibrillation

	Entire population			Excluding amiodarone and levothyroxine users			Restricting to euthyroid range excluding amiodarone and levothyroxine users
	Afib n=92	No Afib n=1273	p-value	Afib n=72	No Afib n=998	p-value	Afib n=62	No Afib n=911	p-value
TSH mIU/L	1.95 (1.36)	2.00 (3.64)	0.28	1.88 (1.36)	1.67 (1.7)	0.06	1.63 (0.82)	1.55 (0.81)	0.32
FT4 ng/dL	1.19 (0.24)	1.12 (0.19)	0.002	1.15 (0.23)	1.08 (0.15)	<0.001	1.13 (0.15)	1.08 (0.14)	0.006
TT3 ng/dL	94.6 (24.4)	99.0 (21.8)	0.03	98.2 (23.3)	102.7 (20.5)	0.04	99.2 (20.9)	103.0 (19.6)	0.10

Afib, atrial fibrillation; TSH, thyroid stimulating hormone; FT4, free thyroxine; TT3, total triiodothyronine

One-way ANOVA was performed using log transformed values of each thyroid function test in separate models. See Supplement Table 2 for results of adjusted binary logistic regression analyses