Rodriguez‐Villalobos 2005.

Study characteristics
Methods	Study design: prospective cohort longitudinal Location: Mexico Time period: April 1992 to July 2004 Outcome: PDR Outcome measurement: incidence
Participants	Number of participants: 100 Diabetes type: T2D Inclusion criteria: adults with T2D detected in random home visits in suburbs with different socioeconomic areas, who voluntarily accepted participation in the study Exclusion criteria: participants (from initial cohort) who could not be evaluated to determine whether they developed DR or progressed, due to change of address, refusal to participate, or death
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/hxe2a/?view_only=6efd4af757c84fe397e8bba5246032b0
Item	Authors' judgement	Support for judgement
Study participation	No	See ‘Notes’ above for link to risk of bias assessment
Study attrition	No	See ‘Notes’ above for link to risk of bias assessment
Prognostic factor measurement	No	See ‘Notes’ above for link to risk of bias assessment
Outcome measurement	Unclear	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