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Table 1 Characteristics of studies included to study determinants of PTBS in East African countries

From: Determinants of preterm birth among mothers who gave birth in East Africa: systematic review and meta-analysis

Author/year

Country

Study design

Sample size

Quality status

Abaraya et al. 2016 [57]

Ethiopia

Unmatched case control

656

Low risk

Abrams et al.2004 [72]

Malawi

Cross sectional

572

Low risk

Adam et al.2010 [74]

Sudan

Cross sectional

1200

Low risk

Adane et al. 2014 [60]

Ethiopia

Cross sectional

481

Low risk

Aidoo et al.2001 [67]

Kenya

Retrospective cohort

1077

Low risk

Alhaj et al.2010 [10]

Sudan

Case control

293

Low risk

Alson et al.2010 [85]

Madagascar

Cohort

206

Low risk

Arnaldo et al. 2018 [82]

Mozambique

Cross sectional

1038

Low risk

Ayebare E et al. 2018 [7]

Uganda

Case control

296

Low risk

Ayisi et al.2003 [66]

Kenya

Cohort

5168

Low risk

Berhanie et al. 2019 [53]

Ethiopia

Unmatched case control

954

Low risk

Chagomerana et al.2017 [68]

Malawi

Retrospective cohort

3074

Low risk

Chico et al.2017 [75]

Zambia

Prospective cohort

1086

Low risk

Cole et al.2001 [50]

Tanzania

Prospective cohort

1078

Low risk

Deborah Watson-Jones et al.2007 [48]

Tanzania

Prospective cohort

1688

Low risk

Deressa, et al. 2018 [56]

Ethiopia

Cross sectional

384

Low risk

Feresu et al.2004 [79]

Zimbabwe

Case control

3103

Low risk

Feresu et al.2004 [80]

Zimbabwe

Retrospective cohort

17,174

Low risk

Gebreslasie K 2016 [62]

Ethiopia

Cross sectional

540

Low risk

Gesase et al.2018 [34]

Tanzania

Cross sectional

1117

Low risk

Habib et al.2008 [47]

Tanzania:

Cohort

16,762

Low risk

Kalanda et al.2006 [71]

Malawi

Cross sectional

4104

Low risk

Karki S 2016 [5]

Kenya

Cross sectional

691

Low risk

Kebede et al.2013 [61]

Ethiopia

Retrospective cohort

416

Low risk

Kumwenda et al.2017 [76]

Zambia

Comparative cross sectional

200

Low risk

Laelago et al.2017 [58]

Ethiopia

Cross sectional

195

Low risk

Lepory et al.1998 [84]

Rwanda

Prospective cohort

1233

Low risk

Li et al.2016 [41]

Tanzania

Prospective cohort

3314

Low risk

Mace et al.2015 [77]

Zambia

Retrospective cohort

435

Low risk

Mahand et al.2013 [46]

Tanzania

Cohort

3359

Low risk

Mahande et al.2016 [39]

Tanzania

Retrospective cohort

17,030

Low risk

Mahande et al.2016 [39]

Tanzania

Retrospective cross sectional

30,797

Low risk

Mahande, et al. 2017 [37]

Tanzania

Matched case control

100

Low risk

Mahapula et al. 2016 [38]

Tanzania

Case control

754

Low risk

McDonald CR, et al.2015 [43]

Tanzanian

Cohort

1054

Low risk

Mekonen et al.2019 [52]

Ethiopia

Cross sectional

575

Low risk

Menendez et al.2000 [51]

Tanzania.

Cross sectional

1225

Low risk

Mochache KM/2016 [65]

Kenya

Prospective cohort

292

Low risk

Mosha et al.2015 [36]

Tanzania.

Cohort study

2167

Low risk

Mosha et al.2016 [36]

Tanzania

Prospective cohort

7634

Low risk

Mpogoro et al.2014 [44]

Tanzania

Cross sectional

431

Low risk

Muti et al.2015 [78]

Zimbabwe

Cross sectional

287

Low risk

Muti et al.2015 [78]

Zimbabwe

Cross sectional

287

Low risk

Ndeserua [42] et al.2015

Tanzania

Cross sectional

350

Low risk

Okube et al. 2017 [64]

Kenya

Cross sectional

184

Low risk

Osman et al.2001 [83]

Mozambique

Prospective cohort

908

Low risk

Rempis’ et al. 2017

Uganda

Cross-sectional

412

Low risk

Sharif et al2017 [73]

Sudan

Case control

112

Low risk

Sigalla et al. 2017 [35]

Tanzania

Prospective cohort

1133

Low risk

Stephen et al.2018 [33]

Tanzania

Cohort

529

Low risk

Sullivan et al.1999 [6]

Malawi

Cross sectional

178

Low risk

Taha et al.2012 [4]

Malawi

Cross sectional

8874

Low risk

Teklay et al.2018 [55]

Ethiopia

Un-matched retrospective case–control

264

Low risk

Turner et al.2013 [70]

Malawi

Cohort

809

Low risk

Van den Broek et al.2014 [69]

Malawi

Cross sectional

2149

Low risk

Wagura et al. 2018 [54]

Kenya

Cross sectional

322

Low risk

Watson-Jones et al.2002 [49]

Tanzania

Retrospective cohort

380

Low risk

Zerfu et al.2016 [59]

Ethiopia

prospective cohort

432

Low risk