Rudnisky 2017.

Study characteristics
Methods	Study design: registry data Location: Canada Time period: November 1999 to November 2009  Outcome: PDR Outcome measurement: incidence
Participants	Number of participants: 2842 Diabetes type: not reported Inclusion criteria: DM (not defined, includes self‐diagnosis, lab‐confirmed, taking diabetic medications); underwent at least two tele‐ophthalmology examinations between November 1999 and November 2009 and first visit occurred before 31 December 2007 Exclusion criteria: absent or ungradable retinal photographs
Notes	Link to data extraction table, risk of bias assessment, and results: osf.io/jdzc8/?view_only=3ba4db20f11d4ea9aa0696d61170b15e
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	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