TABLE 3.

Percentage of Cases Positive for Complement

C′	Percent Positive; p Value	EP	BM	BMs	BMc	C	S	V	Any
C1q	Percent positive MS	8	46	0	62	77	100	38	100
	Percent positive non-MS	66	51	6	69	89	80	31	97
	p value	0.007	> 0.999	> 0.999	0.74	0.37	0.17	0.74	> 0.999
C3d	Percent positive MS	0	54	0	69	100	92	38	100
	Percent positive non-MS	3	49	6	91	100	94	3	100
	p value	> 0.999	> 0.999	> 0.999	0.08	> 0.999	> 0.999	0.004	> 0.999
C4d	Percent positive MS	0	15	0	23	8	0	0	31
	Percent positive non-MS	6	31	0	14	14	0	0	40
	p value	> 0.999	> 0.999	> 0.999	0.66	> 0.999	> 0.999	> 0.999	0.74
C9	Percent positive MS	21	4	71	38	96	13	67	100
	Percent positive non-MS	7	3	42	31	98	10	83	98
	p value	0.112	> 0.999	0.03	0.61	0.50	0.71	0.14	> 0.999
C9 neo	Percent positive MS	13	17	4	4	67	8	21	75
	Percent positive non-MS	7	16	0	3	79	14	21	81
	p value	0.41	> 0.999	0.29	> 0.999	0.26	0.72	> 0.999	0.56

Any, staining of any of the following components of the choroid plexus; BM, epithelial basement membrane staining; BMc, staining of epithelial basement membrane overlying concretion; BMs, stippled staining of epithelial basement membrane; C, staining of concretion; EP, epithelial cell staining; S, staining of stroma; V, staining of stromal vasculature.

p < 0.0007 after Bonferroni correction.