Varma 2010.

Study characteristics
Methods	Study design: prospective cohort longitudinal Location: USA Time period: baseline clinical examination 2000 to 2003; 4‐year follow‐up examination 2004 to 2008 Outcome: PDR and HRC‐PDR Outcome measurement: incidence
Participants	Number of participants: 904 Diabetes type: T1D and T2D Inclusion criteria: self‐identification as Latino or of Latino heritage; age 40 years or older on the day of the household screening for the Los Angeles Latino Eye Study; residency in one of the selected La Puente census tracts; definite DM diagnosis Exclusion criteria: not reported
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/e5h24/?view_only=9d4bde926ce64592a109b012f79d3ffb
Item	Authors' judgement	Support for judgement
Study participation	Unclear	See ‘Notes’ above for link to risk of bias assessment
Study attrition	Unclear	See ‘Notes’ above for link to risk of bias assessment
Prognostic factor measurement	Unclear	See ‘Notes’ above for link to risk of bias assessment
Outcome measurement	Yes	See ‘Notes’ above for link to risk of bias assessment
Adjustment for other prognostic factors	No	See ‘Notes’ above for link to risk of bias assessment
Statistical analysis and reporting	Unclear	See ‘Notes’ above for link to risk of bias assessment