Table I.

Characteristics of alloimmunized study patients.

	n
Gender
Male	30
Female	5
Race/Ethnicity*
White, non-Hispanic	32
White, Hispanic	1
Black, non-Hispanic	1
Unspecified, non-Hispanic	1
Types of autoimmune disorders†
Inflammatory bowel disease	9
Psoriasis/psoriatic arthritis	9
Rheumatoid arthritis	7
Polymyalgia rheumatica	4
Others	13

^*Race/ethnicity information was extracted from demographic data within the electronic medical record. Patients receiving care at our facility self-identify race and ethnicity at the time of their enrollment. Race/ethnicity data were therefore unconfirmed by the study authors. The majority of alloimmunized patients self-identified as white, non-Hispanic (91·4%, 32/35).

^†As some patients had >1 autoimmune disorder, the total number of associated disease states was 42. For those patients with inflammatory bowel disease (IBD, n = 9), 5 were diagnosed with ulcerative colitis, 4 with Crohn’s disease, and 1 with IBD not further classifiable. Disorders falling under the ‘Others’ category included: bullous pemphigoid (n = 2), pernicious anaemia (n = 2), ankylosing spondylitis (n = 1), antiphosholipid syndrome (n = 1), celiac disease (n = 1), immune-mediated glomerulonephritis (n = 1), inflammatory/autoimmune idiopathic pulmonary fibrosis (n = 1), sarcoidosis (n = 1), scleroderma (n = 1), Sjogren syndrome (n = 1) and systemic lupus erythematosus (n = 1).