Sayyad 1995.

Methods	Study design: parallel group, randomized controlled trial Number randomized: 64 eyes (number of participants not reported) Exclusions after randomization: none reported Number analyzed: 64 eyes Unit of analysis: not reported Handling of missing data: none reported Sample size calculation: not reported
Participants	Country: Saudi Arabia Mean age: not reported Gender: not reported Inclusion criteria: complicated glaucoma Exclusion criteria: not reported Equivalence of baseline characteristics: not reported Diagnoses in participants: complicated glaucoma
Interventions	MMC group (n not reported): single‐plate Molteno implant with MMC and trabeculectomy No MMC group (n not reported): single‐plate Molteno implant only In all participants in both groups the Molteno tube was ligated temporarily
Outcomes	Outcomes (primary and secondary outcomes not differentiated): mean IOP Length of follow‐up: postoperative day 14, months 3, and 12
Notes	Study period: not reported Trial registration: not reported Funding and conflicts of interest: not reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Method of sequence generation not reported
Allocation concealment (selection bias)	Unclear risk	Allocation concealment not reported
Masking of participants and personnel (performance bias)	Unclear risk	Masking of participants and personnel not reported
Masking of outcome assessment (detection bias)	Unclear risk	Masking of outcome assessors not reported
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Missing data not reported
Selective reporting (reporting bias)	High risk	No full‐length paper published more than 20 years after presenting the trial at a conference
Other bias	Low risk	None identified

^{BSS: balanced salt solution
 IOP: intraocular pressure
 mg/mL: milligrams per milliliter
 MMC: mitomycin C
 mmHg: millimeter of mercury}