Study	Reason for exclusion
Allen 1971	No randomized or quasi‐randomized comparisons were made. The trial evaluated different forms of analgesia for curettage in incomplete miscarriage.
Antonovski 1975	This randomized trial compared metal versus plastic cannulae for induced miscarriages.
Balogh 1982	No randomized or quasi‐randomized comparisons were made. The trial evaluated vacuum aspiration in induced miscarriages.
Blumenthal 1994	No randomized or quasi‐randomized comparisons were made. The trial involved a time and cost analysis for management of incomplete miscarriage with MVA.
Caceres 1979	This study provides scarce data on the randomization procedures (i.e. sequence allocation, concealment of allocation) and excludes a significant portion of the study population post‐randomization.
Caceres 1981	Multiple unsuccessful attempts were made to get this manuscript.
Caceres 1981a	This study provides scarce information on the randomization procedures and the characteristics of the patients in randomized groups show differences, increasing the risk of bias for the outcome analysis.
Cheng 1976	This randomized trial compared inpatient versus outpatient management of induced miscarriage.
de Holanda 2003	This study provides scarce data on the randomization procedures (i.e. sequence allocation, concealment of allocation) and excludes a significant portion of study population post‐randomization.
Edwards 2007	This randomized trial compares manual vacuum aspiration with electric vacuum aspiration.
El Kabarity 1985	Multiple unsuccessful attempts were made to get this manuscript.
Farell 1982	No randomized or quasi‐randomized comparisons were made. The trial examined treatment of consecutive patients with suction curettage.
Filshie 1973	No randomized or quasi‐randomized comparisons were made. The trial examined treatment of consecutive patients with suction curettage.
Fonseca 1997	This randomized trial evaluated cost and duration of hospital stay. The data presented was not suitable for extraction. Unsuccessful attempts were made to get additional data.
Gruenberger 1979	The trial evaluated different forms of analgesia for suction curettage.
Henderson Lewis 1979	Multiple unsuccessful attempts were made to get this manuscript.
Hill 1971	No randomized or quasi‐randomized comparisons were made. The trial compared consecutive patients undergoing sharp curettage to those undergoing vacuum curettage during another time period.
Johnson 1993	No randomized or quasi‐randomized comparisons were made. This trial involved a cost analysis for treatment of incomplete miscarriage with MVA and sharp curettage.
Kizza 1990	This trial was not randomized, as allocation was by alternation. Manual vacuum aspiration was compared to sharp metal curettage in women with incomplete miscarriage.
Lean 1976	This randomized trial compared dilatation and curettage and vacuum aspiration for induced miscarriage.
Lukman 1996	No randomized or quasi‐randomized comparisons were made. The trial evaluated vacuum aspiration and sharp curettage for management of incomplete miscarriage.
Magnelli 1992	It was not clear whether this trial was randomized. Women with incomplete miscarriage, stillbirths, molar pregnancy, retained products, and anembryonic pregnancy were treated with either suction curettage or sharp curettage.
Magotti 1995	This was a quasi‐randomized trial, but the data were not complete and suitable for extraction. Unsuccessful attempts were made to get additional data.
Mahomed 1994	No randomized or quasi‐randomized comparisons were made. The trial evaluated vacuum aspiration and sharp curettage for management of incomplete miscarriage.
Rashid 1970	No randomized or quasi‐randomized comparisons were made. The trial examined treatment of consecutive patients with suction curettage.
Ricalde 1997	No randomized or quasi‐randomized comparisons were made. The trial examined vacuum aspiration and dilatation and curettage for incomplete miscarriage.
Suter 1970	No randomized or quasi‐randomized comparisons were made. The trial examined treatment of consecutive patients with suction curettage.

MVA = manual vacuum aspiration