Table 6.

Prevalence of anemia in inflammatory bowel disease adult patients; results of recent studies using the World Health Organization criteria

Authors/year	Country	n	Diagnosis	Design	Prevalence (%)
Goodhand et al 2012 (6)	UK	124	IBD	Cross-sectional observational study of outpatients	40
Voegtlin et al 2010 (7)	Switzerland	241	IBD	Cross-sectional	21.2
Bager et al 2013 (8)	Six Scandinavian centers	300	IBD	longitudinal follow- up study	54.3***
Filmann et al 2014 (11)	5 European countries	2192	IBD CD UC	Metaanalysis	24 27 21
Høivik et al 2014 (4)	Norway	756	CD UC	Population based	48.8 20.2
Sjöberg et al 2014 (9)	Sweden	749	IBD CD UC	Population based	30 42 24
Koutroubakis et al 2015*	USA	1821	IBD CD UC	Registry study of outpatients	50.1** 53.3 44.7

^*The present study;

^**5-year period prevalence

^***2-year period prevalence CD, Crohn’s disease; UC, ulcerative colitis; IBD, inflammatory bowel disease