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Table 6 Summary characteristics of studies in the meta-analysis to show assessment of risk of bias of the included studies the prevalence Gestational diabetes mellitus in Africa, 2013–2018

From: Prevalence and determinants of gestational diabetes mellitus in Africa based on the updated international diagnostic criteria: a systematic review and meta-analysis

S.N

Author, year of publication

Sample of pregnant women representative?

Sampling

Frame representative?

Random or census selection?

Response rate ≥75%?

Data from subjects?

Acceptable diagnostic criteria?

Reliable testing for BG?

Same method for all?

Proper gestational age GDM test?

Proper calculation prevalence

Total ‘Yes’

Overall risk of bias

1

Niyibizi et al., 2016 [13]

Yes

No

No

Yes

Yes

No

No

Yes

Yes

No

5

High

2

Sagheer and Hamdi , 2018 [56]

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

3

Ogoudjobi et al., 2017 [44]

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

4

Oppong et al., 2015 [45]

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

5

Oriji et.al., 2017 [41]

Yes

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

8

Low

6

Agbozo et al., 2018 [39]

No

No

No

Yes

Yes

No

No

No

Yes

Yes

9

High

7

Nakabuye et al., 2017 [47]

No

Yes

No

Yes

Yes

Yes

No

Yes

Yes

No

6

Moderate

8

Macaulay et al., 2018 [54]

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

9

Abbey and Kasso , 2018 [40]

No

No

No

Yes

Yes

No

No

Yes

No

Yes

4

High

10

Njete et al., 2018 [48]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

10

Low

11

Pastakia et al., 2017 [49]

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

12

Olagbuji et al., 2017 [42]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

No

8

Low

13

Munang et al., 2017 [51]

Yes

Yes

Yes

Yes

Yes

Yes

No

No

Yes

Yes

8

Low

14

Jao et al., 2013 [53]

No

No

Yes

NR

Yes

Yes

Yes

Yes

Yes

Yes

7

Moderate

15

Djomhou et al., 2016 [52]

No

No

Yes

Yes

Yes

No

No

Yes

No

No

4

High

16

Olagbuji et al., 2015 [17]

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

10

Low

17

Ogu et al., 2017 [43]

No

No

No

NR

No

Yes

Yes

Yes

No

Yes

4

High

18

Khalil et al, 2017 [57]

No

No

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

7

Moderate

19

Adams and Rheeder, 2017 [15]

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Yes

Yes

9

Low

20

Adoyo et al., 2016 [50]

No

No

No

Yes

Yes

NR

NR

NR

Yes

Yes

4

High

21

Mwanri et al., 2014 [11]

Yes

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

No

8

Low

22

Asare-Anane et al., 2014 [46]

Yes

No

No

Yes

Yes

Yes

Yes

No

Yes

NR

6

Moderate

23

Mathilda et al.,2017 [55]

Yes

Yes

No

Yes

No

No

No

No

Yes

No

4

High

  1. GDM Gestational diabetes mellitus, NR Not Reported