Table 1 Characteristics of included studies (n = 10)
Study author | Study region | Study design | Study period | Age (years) | Specimen | Methods employed | ART status | Sample size | TB incidence follow up time | Incident TB (%) | Participants’ with CD4+ T cell counts < 200 cells/mm3 | Participants’ with CD4+ T cell counts > 200 cells/mm3 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Events | Total | Events | Total | |||||||||||
Balcha et al., 2014 [23] | Oromia | PCS | Oct2011-Mar2013 | >  18 | Sputum, Urine | Microscopy, Culture, Xpert and LAM | Pre-ART | 757 | 6 months | 16.91 | – | – | – | – |
Assebe et al., 2015 [11] | Oromia | RCS | Jan2008-Feb2012 | 15–64 | Sputum | Microscopy and CXR | Pre-ART | 588 | 6 months | 8.33 | – | – | – | – |
Bekele et al. 2017 [12] | SNNP | RCS | Sep2009-Aug2010 | >  15 | N/S | N/S | Pre-ART | 422 | Not clearly stated | 31.99 | – | – | – | – |
ART | 132 | 19.70 | – | – | – | – | ||||||||
Ahmed et al. 2015 [27] | Afar | RCS | July2010-May2015 | >  15 | N/S | N/S | ART | 451 | >  6 months | 26.39 | 62 | 168 | 57 | 283 |
Dalbo et al. 2016 [30] | SNNP | RCS | Dec 2014-Jan2015 | >  15 | Sputum | Microscopy and culture | Pre-ART | 137 | Not clearly stated | 11.68 | – | – | – | – |
ART | 359 | 25.07 | 61 | 200 | 29 | 159 | ||||||||
Abossie et al. 2017 [24] | SNNP | RCS | Sep2010-Aug 2011 | 25–34 | Sputum | Microscopy | ART | 271 | 6 months | 18.08 | – | – | – | – |
Edessa et al. 2014 [25] | Addis Ababa | RCS | Feb2013-May2013 | >  18 | N/S | N/S | ART | 742 | 6 months | 10.78 | – | – | – | – |
Semu et al. 2017 [26] | Addis Ababa | RCS | July2012-Aug2012 | Adult | N/S | N/S | ART | 2524 | >  6 months | 10.97 | – | – | – | – |
Nigussie et al. 2015 [28] | Addis Ababa | RCS | Aug2014-May2015 | >  15 | Sputum | Microscopy and CXR | ART | 480 | >  6 months | 14.58 | 65 | 323 | 5 | 157 |
Kassa et al. 2012 [29] | Addis Ababa | RCS | 2005–2009 | >  15 | N/S | N/S | ART | 3211 | >  6 months | 8.41 | – | – | – | – |