Table 1.

Demographics of Birmingham antibody deficiency cohort (n = 292)

Age (yr, median, IQR)	62.0 (44.0–73.0)
Sex (n, %M)	135 (46.2%)
Diagnosis (n,%)
Primary immunodeficiencies
- Common variable immunodeficiency - Combined immunodeficiency - Other primary antibody deficiency - Specific polysaccharide antibody deficiency - X-linked agammaglobulinemia - Other	120 (41.0%) 26 (8.9%) 13 (4.5%) 9 (3.1%) 2 (0.7%) 10 (3.4%)
Secondary immunodeficiencies
- Secondary immunodeficiency	112 (38.4%)
Immunoglobulin replacement (n,%)
- Intravenous - Subcutaneous - None	88 (30.1%) 110 (37.7%) 94 (32.2%)