Table 2.

The detection rate of ABCA4 variants in patients with an STGD1 phenotype in different populations.

Population	ABCA4 Allele Detection Rate	Reference
Canada (isolated population Newfoundland)	93%	[115]
Chinese	61–84%	[103,116]
Polish	79%	[117]
Danish	77%	[99]
Portuguese	76%	[100]
Spain	76%	[98]
Germany	74%	[118]
Mexico	74%	[119]
USA	50–75%	[120,121]
Hungarian	65.7%	[122]
South Africa	62%	[123]
Canadian	59%	[116]
French Canadian	33%	[116]