Table 2: FCGR3B gene copy number distribution in GCA patients and controls. Odds ratios (OR) and values were derived by logistic regression, with the normal diploid copy number (2) selected as the reference category.

FCGR3B copy numberControl (%)GCA (%)OR (95% CI) Value

<210 (6.2)9 (6.5)1.1 (0.4, 2.8)0.85
2139 (85.8)114 (82.6)1
3+13 (8.0)15 (10.8)1.4 (0.6, 3.1)0.39

Chi-squared = 0.75, degrees freedom = 2, and value = 0.69.