Study	Reason for exclusion
Abdelraheem 2016	Insufficient data
Adams 2015	Wrong patient population
Adnan 2017	Insufficient data
Ageep 2013	Wrong target condition
Andrade 2010	Wrong index test
Arvind 2015	Predatory journal
Ashton 2010	Wrong index test
Ayorinde 2016	Wrong target condition
Ba 2017	Wrong index test
Bahk 2018	Wrong index test
Barber 2013	Wrong index test
Bell 2001	Wrong index test
Bendezu 2010	Wrong index test
Berhane 2017	Wrong study design
Berzosa 2018	Wrong index test
Bharti 2008	Wrong index test
Bharti 2013	Wrong study design
Bhide 2014	Wrong index test
Birhanie 2016	Wrong index test
Bisoffi 2014	Wrong study design
Britton 2016	Wrong index test
Chayani 2004	Wrong index test
Cho 2016	Wrong index test
Dahesh 2015	Full text not available
Dash 2013	Insufficient data
Deida 2019	Wrong index test
DeKoninck 2017	Wrong patient population
Dev 2004	Wrong index test
Dinzouna‐Boutamba 2014	Wrong index test
Dzakah 2014	Wrong patient population
Ehtesham 2015	Wrong patient population
Eibach 2013	Wrong index test
Elahi 2013	Wrong index test
Endeshaw 2012	Wrong index test
Falade 2016	Wrong target condition
Fernando 2004	Wrong index test
Fernando 2004a	Wrong index test
Foster 2014	Wrong study design
Fransisca 2015	Wrong index test
Gabrielli 2016	Wrong patient population
Ghai 2016	Wrong index test
Gupta 2018	Wrong index test
Harani 2006	Wrong index test
Hawash 2019	Wrong patient population
Jabeen 2016	Insufficient data
Jahan 2019	Wrong index test
Joseph 2018	Wrong index test
Karimov 2013	Full text not available
Kim 2013	Wrong index test
Kolaczinski 2004	Wrong index test
Kosack 2013	Wrong index test
Kumari 2014	Predatory journal
Liu 2013	Full text not available
Mallepaddi 2019	Wrong index test
Metzger 2011	Wrong index test
Moges 2012	Wrong index test
Mohon 2012	Wrong index test
Olasehinde 2018	Wrong index test
Pakalapati 2013	Wrong index test
Pattanasin 2003	Wrong index test
Puri 2013	Wrong index test
Rakotonirina 2008	Wrong index test
Ranjan 2016	Insufficient data
Ratsimbasoa 2007	Wrong index test
Ratsimbasoa 2008	Wrong index test
Samane 2010	Wrong index test
Selimuzzaman 2010	Wrong index test
Shaikh 2013	Insufficient data
Sharma 2014	Wrong study design
Singh 2000a	Wrong index test
Singh 2003	Wrong index test
Singh 2013	Wrong study design
Siwal 2018	Wrong patient population
Stijnberg 2013	Conference abstract
Strom 2014	Wrong target condition
Thongdee 2014	Wrong index test
Tjitra 1999	Wrong index test
Trouvay 2013	Wrong index test
Valecha 2003	Wrong index test
van den Broek 2006	Wrong index test
Vohra 2014	Insufficient data
Wang 2014	Full text not available
Wongsrichanalai 2003	Wrong index test
Woyessa 2013	Wrong study design
Xiaodong 2013	Wrong index test
Yan 2013	Wrong index test