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Table 1 Characteristics of the RCT and observational studies included

From: Aspiration versus peritoneal lavage in appendicitis: a meta-analysis

Study

Nation

Type of study

Time of enrolment

Number of patients enrolled

Irrigation and suction

Suction

Gemici 2020

Turkey

RCT

2014–2017

286

112 (39.2%)

174 (60.8%)

Anderson 2020

Texas

RCT

2016–2017

100

50 (50%)

50 (50%)

Nataraja 2019

Australia, China

RCT

2015–2018

86

44 (51.2%)

42 (48.8%)

Lee 2019

Korea

CCT

2014–2016

553

207 (37.4%)

346 (62.6%)

Escolino 2018

Italy France, United Kingdom, Austria, Missouri

CCT

Over 5 years

699

488 (69.8%)

211 (30.2%)

Sardiwalla 2018

South Africa

RCT

2016–2017

86

42 (48.8%)

44 (51.2%)

Sun 2017

China

RCT

2015–2016

260

130 (50%)

130 (50%)

Snow 2016

Australia

RCT

2013–2015

81

40 (49.4%)

41 (50.6%)

Cho 2015

Korea

CCT

2010–2013

1817

731 (40.2%)

1086 (59.8%)

Hartwich 2013

USA

CCT

2005–2011

237

139 (58,6%)

98 (41,4%)

St. Peter 2012

USA

RCT

2008–2011

220

110 (50%)

110 (50%)

Akkoyun 2012

Turkey

CCT

1998–2011

234

61 (26.1%)

173 (73.9%)

Moore 2011

USA

CCT

2007–2008

176

115 (65.3%)

61 (34.7%)

Toki 1995

Japan

RCT

1984–1993

53

29 (54.7%)

24 (45.3%)

Buanes 1991

Norway

RCT

1984–1987

83

39 (47%)

44 (53%)

Stewart 1978

Great Britain

CCT

1965–1974

189

117 (61.9%)

72 (38.1%)

Normann 1975

Norway

CCT

1968–1973

155

78 (50.3%)

77 (49.7%)

  1. RCT randomized controlled trial, CCT controlled clinical trial