Table 1.

Frequency of copy number (CN) variation in the FCGR3B gene in SLE patients and controls. Odds ratios with 95% confidence intervals (CI) for the association between FCGR3B gene copy number (CN) and SLE. Reference group is healthy controls (n = 162).

FCGR3B CN	SLE n = 107	Controls n = 162	OR	P value
<2	20%	6%	4.15 (CI: 1.82–29.46)	P = 0.0003
2	70%	86%	1
>2	9%	8%	1.03 (CI: 0.43–2.47)	P = 0.82

Global χ ² = 13.78, degrees of freedom = 2, and P = 0.001.