Table 2.

Participant comorbidities by immunoglobulin status.

Comorbidity	Negative Ig (N = 830)	Positive Ig (N = 25)
Diabetes	20 (2.4%)	0
Cardiovascular disease	78 (9.4%)	2 (8%)
Chronic hepatic disease	6 (0.7%)	1 (4%)
COPD	31 (3.7%)	1 (4%)
CKD	4 (0.5%)	0
Immunodeficiency	11 (1.3%)	0
Cancer	2 (0.2%)	0
Pregnancy	1 (0.1%)	0

Abbreviations: Ig, immunoglobulin; COPD, chronic obstructive pulmonary disease; CKD, chronic kidney disease.