Table 1. Summary of prevalence studies of diabetic retinopathy.

Years conducted	Name of study	Population	Sample age (a)	Sample size	Prevalence	Photograph	Classification
1980-1982	WESDR[3]	American	≥30	1370	28.8% (5y); 77.8% (15y)	Fields 1-7	ETDRS
1985-1987	SAHS[4]	American	≥40	351	36.2%	Fields 1-7	ETDRS
1984-1988	SLVDS[5]	Mexican American/non Hispanic whites	≥40	360	35.3%	Fields 1,2,4	ETDRS
1988-1990	BDES[6]	White	≥40	410	35.1%	Fields 1-7	ETDRS
1988-1992	BES[7]	Black	40-84	615	28.5%	Fields 1-2	ETDRS
1992-1994	BMES[8]	White	≥50	252	29%	Fields 1-5	ETDRS
1999-2000	Proyecto VER[9]	Mexican American	≥40	1044	44.3%	Fields 1,2,4	ETDRS
2000-2003	LALES[10]	Latinos	≥40	1217	45.8%	Fields 1-7	ETDRS
2004	SiMES[11]	Malay	40-79	757	35%	Fields 1-2	ETDRS
2003-2005	CURES[12]	Indian	≥20	1636	17.6%	Four-field	ETDRS
2003-2005	SN-DREAMS[13]	Indian	≥40	1816	18%	Four-field	ETDRS

WESDR: Wisconsin Epidemiologic Study of Diabetic Retinopathy; SAHS: San Antonio Heart study; SLVDS: San Luis Valley Diabetes Study; BES: Barbados Eye Study; BDES: Beaver Dam Eye Study; BMES: Blue Mountains Eye Study; LALES: Los Angeles Latino Eye Study; SiMES: Singapore Malay Eye Study; CURES: Chennai Urban Rural Epidemiology Study Eye Study; SN-DREAMS: Sankara Nethralaya-Diabetic Retinopathy Epidemiology and Molecular Genetic Study; ETDRS: Early Treatment Diabetic Retinopathy Study grading system.