. 2019 May 10;19:405. doi: 10.1186/s12879-019-4031-2

Table 1.

Characteristics of included studies (n = 7)

Study	Study area	Study design	Study period	Age (years)	Specimen	Methods employed	Participants	IPT Follow up in months	Experimental		Control
Study	Study area	Study design	Study period	Age (years)	Specimen	Methods employed	Participants	IPT Follow up in months	Events	Total	Events	Total
Abossie et al., 2017 [21]	Arba Minch, SNNP	RCS	Sep 2010 - Aug 2011	25–34	Sputum	Microscopy	271	6 months	12	138	37	133
Alemu et al., 2016 [25]	West Gojjam and South Gondar, Amhara	RCS	Sep 2009 -Sep 2014	1–15	Sputum	Microscopy, CXR and histopathology	645	6 months	11	119^a	6	526
Nigussie et al., 2015 [22]	Addis Ababa	RCS	Aug 2014 - May2015	> 15	Sputum	Microscopy and CX	480	6 months	12	160	58	320
Edessa et al., 2014 [23]	Addis Ababa	RCS	Sep 2009 - Mar 2012	> 18	N/S	N/S	742	6 months	5	185	75	557
Yirdaw et al., 2014 [24]	Southern Ethiopia, SNNP	RCS	Sep 2007 - Aug 2010	0.16–82	Sputum	Microscopy and CXR	5407	6 months	51	2131	244	3276
Semu et al., 2017 [26]	Addis Ababa	RCS	2007 - Jan 2010	Adults	N/S	N/S	1842	12 months	4	942	71	900
Ahmed et al., 2015 [27]	North-eastern Ethiopia, Afar	RCS	July 2010 - May 2015	> 15	N/S	N/S	451	12 months	4	94	115	357

Keys: CXR Chest x-ray, N/S not specified, RCS Retrospective cohort study, SNNP Southern nations nationalities and peoples of Ethiopia, ^aadministered IPT concomitantly with Cotrimoxazole