Jones 2012.

Study characteristics
Methods	Study design: prospective cohort longitudinal Location: UK Time period: January 1990 to December 2006 Outcome: PDR Outcome measurement: cumulative incidence
Participants	Number of participants: 3632 Diabetes type: T1D and T2D Inclusion criteria: screened at Central Norfolk DR Screening Service between January 1990 and December 2006 Exclusion criteria: sight‐threatening maculopathy or PDR at first retinal exam
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/gzan9/?view_only=f42d9d00afaf40f9ad6872fb841e754e
Item	Authors' judgement	Support for judgement
Study participation	Unclear	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	Unclear	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