Table 1. Clinical characteristics of study populations.

		Caucasian ancestry	African ancestry	Total
Families	N	89	45	134
Individuals	N	538	248	786
Affected	N	278	123	401
	Mean age-of-onset in years (range)	59 (28–84)	54 (26–81)	58 (26–84)
	% female	54	56	54
	Mean maximum IOP	28.1	31.5	29.0
	Affected sibling pairs (N)	180	68	248
	Affected non-sib relative pairs (N)*	58	35	93
Unaffected	N	260	125	385
	Mean age-at-exam in years (range)	68 (50–83)	64 (45–76)	67 (45–83)
	% female	51	49	50