Concomitant Thyroid Disorders and Inflammatory Bowel Disease: A Literature Review

Table 1

The reported prevalence of hyperthyroidism in inflammatory bowel disease.

Authors (year)	Type of IBD	Prevalence in IBD	Prevalence in general populations	Reference
Järnerot et al. (1975)	UC	3.7% (11/300)	0.83% (5/600)	[16]
Snook et al. (1989)	UC	1.5% (13/858)	0.67% (2/300)	[15]
	CD	0.26% (1/378)	0.67% (2/300)	[15]
Pooran et al. (2003)	CD	0.95% (2/210)	0% (0/206)	[23]
Casella et al. (2008)	UC	0.62% (1/162)	1.2% (69/5721)	[5]
Yakut et al. (2011)	UC	4.4% (5/113)	0% (0/66)	[24]
	CD	0% (0/33)	0% (0/66)	[24]
Liu et al. (2013)	CD	0% (0/44)	—	[19]

IBD: inflammatory bowel disease; UC: ulcerative colitis; CD: Crohn’s disease.
The prevalence was significantly higher in UC patients than in the general populations ().