Development of a primary care screening algorithm for the early detection of patients at risk of primary antibody deficiency

Table 2 Patient characteristics

Group	No. of patients	% Female	Mean age (SD)
General population	58,223	52.9	39.8 (13.9)
Upper RTI	13,133	57.4	38.4 (16.3)
COPD/asthma	4427	53.2	42.3 (15.7)
IBD	403	54.6	43.8 (12.9)
Malignancy	1526	60.5	55.2 (12.0)
Primary care immunodeficiency	26	53.8	At diagnosis: 33.3 (15.4)
Primary care immunodeficiency	26	53.8	At data-extraction date: 40 (14.8)
PAD	30	40	Onset symptoms: 6.4 (7.4)
			At diagnosis: 19.4 (16.7)
			At data-extraction date: 29.8 (14)

Patient characteristics of the different control groups, the immunodeficiency patients registered in primary care and the PAD patients registered in an academic hospital. If not stated otherwise, the values were captured on the date of data extraction (November 2021)
COPD chronic obstructive pulmonary disease, IBD inflammatory bowel disease, JHN Julius General Practitioner Network, a general practitioner network in Utrecht, Netherlands, no. number, RTI respiratory tract infection, SD standard deviation

ISSN: 1710-1492