Bashshur 2004	Mixed prospective and retrospective comparative case series
Batioglu 2007	Case series
Cheng 2008	Prospective comparative non-randomized clinical interventional study
Gelston 2006	Retrospective comparative case series
Georgopoulos 2006	Dexamethasone as intervention, not limited to CRVO
Jiang 2006	BRVO also, no control
Jonas 2005	Prospective non-randomized clinical interventional study
Manaviat 2008	Did not meet inclusion criteria: Included patients with ME and retinal vein occlusion, either CRVO or BRVO; length of follow up was not consistent for all patients, range was 1 to 16 months and only three patients were followed up after 4 months
Ramezani 2006	Did not meet inclusion criteria: 4-month follow up, sham injection as control group (not observation)

BRVO: branch retinal vein occlusion

CRVO: central retinal vein occlusion

DR: diabetic retinopathy

IVS: intravitreal steroid

IVTA: intravitreal triamcinolone

NVG: neovascular glaucoma

PRP: panretinal photocoagulation

RCT: randomized controlled trial

SCORE: Standard Care vs. COrticosteroid for REtinal Vein Occlusion