Table 2 Subgroup analysis of the prevalence of gestational diabetes mellitus in Africa, 2013–2018
Subgroup | Number of studies | Total Sample | Prevalence (95%CI) | Heterogeneity | |||
|---|---|---|---|---|---|---|---|
Q-value | Df | I2 | P-value | ||||
Sub-region | |||||||
 East Africa | 6 | 2444 | 16.76 (8.47, 25.05) | 102.242 | 5 | 97.6 | <  0.001 |
 Southern Africa | 3 | 2992 | 14.28 (6.22, 22.35) | 49.0036 | 2 | 97.3 | <  0.001 |
 West Africa | 8 | 4500 | 10.72 (7.52, 13.91) | 18.7272 | 7 | 93.4 | <  0.001 |
 Central Africa | 3 | 816 | 20.04 (1.55, 38.54) | 259.1118 | 2 | 97.9 | <  0.001 |
 Northern Africa | 2 | 950 | 7.57 (5.89, 9.25) | 0.00 | 1 | 0.00 | 0.774 |
 Sub Saharan African countries | 20 | 10,752 | 14.28 (11.39, 17.16) | 39.6514 | 19 | 96.4 | <  0.001 |
Publication year of study | |||||||
 2013 | 2 | 1226 | 9.75 (3.08, 16.41) | 21.5605 | 1 | 93.3 | <  0.001 |
 2015 | 2 | 1458 | 8.78 (7.33, 10.23) | 0.0000 | 1 | 0.0 | 0.679 |
 2016 | 3 | 434 | 19.27 (6.63, 31.91) | 113.7686 | 2 | 91.7 | <  0.001 |
 2017 | 10 | 4922 | 14.55 (9.69, 19.40) | 58.1562 | 9 | 97.7 | <  0.001 |
 2018 | 5 | 3662 | 12.67 (8.78, 16.55) | 17.1333 | 4 | 91.9 | <  0.001 |
Risk of bias | |||||||
 Low | 12 | 7488 | 13.49 (10.08, 16.90) | 33.9381 | 11 | 96.6 | <  0.001 |
 Moderate | 3 | 817 | 14.56 (3.19, 25.94) | 96.6674 | 2 | 96.5 | <  0.001 |
 High | 7 | 3397 | 13.77 (8.14, 19.41) | 52.1874 | 6 | 95.7 | <  0.001 |
Study design | |||||||
 Cross-sectional study | 13 | 7769 | 10.14 (7.86, 12.41) | 15.0084 | 12 | 92.1 | <  0.001 |
 Prospective study | 9 | 3933 | 19.09 (12.35, 25.82) | 100.7873 | 8 | 97.9 | <  0.001 |