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Table 1 Characteristics of the subjects (34 studies)

From: Prevalence of maternal mortality causes based on ICD-MM: a systematic review and meta-analysis

First author

Publication year

Country

Country classification

Study design

N

Method of assigning cause of death

Reference

Halder

2014

India

Developing

Cross sectional

212

Audit team

[30]

Owolabi

2014

Malawi

Developing

Cross sectional

54

Healthcare providers using a standard MDR form

[31]

Knight

2016

UK

Developed

Cross sectional

276

Expert Panel

[27]

Knight

2016

UK

Developed

Cross sectional

269

Expert Panel

[27]

Knight

2016

UK

Developed

Cross sectional

240

Expert Panel

[27]

Mgawadere

2016

Malawi

Developing

Cross sectional

86

Expert Panel

[32]

Cim

2017

Turkey

Developing

Cross sectional

69

Maternal Mortality Review Commission

[33]

Kodan

2017

Suriname

Developing

Cross sectional

65

Expert committee

[17]

Aikpitanyi

2019

Nigeria

Developing

Cross sectional

18

Maternal and Perinatal Death Surveillance and Response Committee of the hospital

[34]

Barzegar

2019

Iran

Developing

Cross sectional

53

Expert Panel

[35]

Engin-Üstün

2019

Turkey

Developing

Cross sectional

812

Investigation Committee

[28]

Engin-Üstün

2019

Turkey

Developing

Cross sectional

812

Investigation Committee

[28]

Engin-Üstün

2019

Turkey

Developing

Cross sectional

812

Investigation Committee

[28]

Engin-Üstün

2019

Turkey

Developing

Cross sectional

812

Investigation Committee

[28]

Sheth

2019

India

Developing

Cross sectional

295

Trained Consultants

[19]

Agrawal

2020

India

Developing

Cross sectional

382

Not Stated

[36]

Kumari

2020

India

Developing

Cohort

131

Maternal mortality review committee

[37]

Mohammed

2020

Iraq

Developing

Cross sectional

206

Registry-based

[38]

Said

2020

Tanzania

Developing

Cross sectional

99

Expert Panel

[39]

Sharma

2020

India

Developing

Cross sectional

42

Maternal death review committee

[40]

Akaba

2021

Nigeria

Developing

Cross sectional

52

Expert Panel

[41]

Aukes

2021

India, Pakistan, and Mozambique

Developing

Cohort

143

Expert reviewers (three doctors)

[42]

Ekka

2021

India

Developing

Cross sectional

142

The facility maternal death review committee and the Institutional death review committee

[43]

Indarti

2021

Indonesia

Developing

Cross sectional

22

MDSR forms

[44]

Jogi

2021

India

Developing

Cross sectional

112

Facility-Based Maternal Death Review Form and MDR Case Summary

[45]

Karimi

2021

Iran

Developing

Cross-sectional

107

MDR committee of hospital

[5]

Kodan

2021

Suriname

Developing

Cross-sectional

73

National MDR committee

[46]

Sarmalkar

2021

India

Developing

Cross sectional

305

Not Stated

[47]

Aghajani

2022

Iran

Developing

Cross-sectional

80

Expert panel

[48]

Kea

2022

Ethiopia

Developing

Cross-sectional

48

MDSR forms

[49]

Musarandega

2022

Zimbabwe

Developing

Cross-sectional

325

Trained obstetricians

[29]

Musarandega

2022

Zimbabwe

Developing

Cross-sectional

137

Trained obstetricians

[29]

Nóbrega

2022

Guinea-Bissau

Developing

Cross sectional

79

Registry-based (EU/PIMI-II)

[16]

Verma

2022

India

Developing

Cross sectional

135

Not Stated

[7]