Table 3 Frequency of a homozygous CFHR1 deletion according to the susceptibility factor and comparison of each subgroup with the control population using a χ² test

	Frequency of homozygous CFHR1 deletion (%) in each subgroup	χ²	p Value
Total cohort	12.4	5.24	0.022
No factor identified	4.8	0.33	NS
CFH mutation	2.6	0.002	NS
FI mutation	15	6.45	0.011
MCP mutation	0	0.50	NS
C3 mutation	6.3	0.31	NS
Combined mutations	0	0.20	NS
Anti-FH IgG	92.9	64.45	<0.0001
Cohort without anti-FH IgG cases	5.5	0.77	NS
Cohort without anti-FH IgG nor FI cases	3.5	0.07	NS
Control population	2.9	–