Burgess 2015.

Study characteristics
Methods	Study design: retrospective cohort longitudinal Location: Malawi Time period: 2007 to 2012 Outcome: PDR Outcome measurement: incidence
Participants	Number of participants: 281 Diabetes type: T1D and T2D Inclusion criteria: individuals who had participated in 2007 cross‐sectional study Exclusion criteria: not reported
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/6y3rc/?view_only=031a09c802af41cb98933e6a98302a5b
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	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