Burry 1989.

Methods	Randomised trial. Double‐blind, double‐dummy design. No details of randomisation. No details of allocation concealment. Attrition 2/53 details in quality table.
Participants	American study of 53 women. Age 23‐38 years. All women complained of infertility, pain or both. Laparoscopic diagnosis was made within 3 months prior to study. Women were excluded if they had received medical therapy for endometriosis within preceding 6 months. 62% of the women had stage III and IV disease.
Interventions	Danazol 800 mg daily (n=10) PO + placebo versus danazol 600 mg daily (n=8) PO + placebo versus nafarelin 800 µg daily (n=10) IN + placebo versus nafarelin 400 µg daily (n=25) IN + placebo. Women were followed up at 2, 4 and 6 months after treatment.
Outcomes	Weight, adverse events, compliances, change in symptoms, haematological analysis, pregnancy.
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Adequate sequence generation?	Unclear risk	'Randomly assigned' no further details.
Allocation concealment?	Unclear risk	Unclear, no further details.
Blinding? All outcomes	Low risk	Double‐blind double‐dummy design with both patients and investigators being blind to treatment.
Incomplete outcome data addressed? All outcomes	Low risk	One women from danazol 800 mg withdrew because of severe headaches, one woman from nafarelin 800 µg withdrew because of mood swings.
Free of selective reporting?	High risk	Not followed up to live birth.