Autoimmune Thyroid Disease in Rheumatoid Arthritis: A Global Perspective

Table 3

Bivariate analysis of continuous variables.

Characteristic	RA with AITD	RA without AITD	P
	Mean ± SD	Mean ± SD
Age	52.26 ± 12.39	51.88 ± 12.24	0.029
	Median ± IQR	Median ± IQR
Educational level (y)	14 ± 7	11 ± 9	0.006
Body mass index	25.5 ± 6.3	23.9 ± 5.9	0.006

AITD: autoimmune thyroid disease; IQR: interquartile range; RA: rheumatoid arthritis; SD: standard deviation.