Hsieh 2018.

Study characteristics
Methods	Study design: prospective cohort Location: Taiwan Time period: baseline: April 2002 to September 2004; end of study: 31 December 10 Outcome: PDR Outcome measurement: incidence and HR
Participants	Number of participants: 2135 Diabetes type: T2D Inclusion criteria: patients who received a diagnosis of T2D and underwent treatment in the outpatient clinic of the Metabolism Division at Changhua Christian Hospital and Kaohsiung Medical University Hospital between April 2002 and September 2004 Exclusion criteria: lost to follow‐up within 6 months; ungradable image results from both eyes at baseline
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/759nk/?view_only=cbb8e5efe90b4af5979af0f889818c26
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	Unclear	See ‘Notes’ above for link to risk of bias assessment
Statistical analysis and reporting	Yes	See ‘Notes’ above for link to risk of bias assessment