Table 1 Characteristics of studies included in the systematic review (n = 78) (A)
 Characteristics | Mean (extrems) Number(percentage) | Number of studies with available data |
|---|---|---|
 Number of patients | 38,187 (48-3717) | 78/78 |
 Average age | 32.5 (22.9–47) | 65/78 |
 Sex ratio | 1.94 | 64/78 |
  Female | 9097 |  |
  Male | 17,656 |  |
 Type of study |  | 75/78 |
  Retrospective | 43 (55.1) |  |
  Prospective | 32 (41) |  |
  NA (not available) | 3 (3.9) |  |
 Study quality (NOS scale) |  | 78/78 |
  Good | 10 (12.8) |  |
  Moderate | 39 (50) |  |
  Poor | 29 (37.2) |  |
 Year of publication |  | 78/78 |
  Before 2000 | 2 (2.8) |  |
  2000–2004 | 3 (3.8) |  |
  2005–2009 | 9 (11.5) |  |
  2010–2014 | 9 (11.5) |  |
  2015–2019 | 28 (35.8) |  |
  After 2020 | 27 (34.6) |  |
 Study location |  | 78/78 |
  West Africa | 42 (53.8) |  |
  Central Africa | 11 (14.1) |  |
  East Africa | 17 (28.8) |  |
  Southern Africa | 3 (3.8) |  |