Study	Reason for exclusion
Allaf 2014	Research question did not include the reference standard.
Banks 2008	Index test difference in birth weight as reference did not match research question.
Ben‐Ami 2015	Birthweight discordance cut‐off did not match research question.
Bora 2009	Research question did not include the reference standard.
Brown 1987	Birthweight discordance cut‐off did not match research question.
Chauhan 1996	Research question did not include the reference standard.
Chauhan 2004	Unable to construct 2 × 2 table from data.
D'Antonio 2013b	Research question did not include the reference standard.
Esinler 2017	Research question did not include the reference standard.
Fajardo‐Expósito 2011	Index test cut‐off did not match research question.
Gaziano 1998	Study did not address the index test.
Harper 2012a	Index test cut‐off did not match research question.
Harper 2012b	Study did not address the index test.
Harper 2012c	Research question did not include the reference standard.
Harper 2013	Study did not address the index test.
Jensen 1992	Study did not address the index test.
Kremkau 1978	Article was not a published study.
Leombroni 2017	Article was a systematic review and meta‐analysis.
Nakano 2015	Research question did not include the reference standard.
O'Brien 1986	Study did not address the index test.
Ocer 2011	Unable to construct 2 × 2 table from data.
Papaioannou 2011	Research question did not include the reference standard.
Ropacka‐Lesiak 2012	Study did not address the index test.
Senoo 2000	Research question did not include the reference standard.
Shivkumar 2015	Research question did not include the reference standard.
Snijder 1998	Research question did not include the reference standard.
Stirrup 2016	Research question did not include the reference standard.
Suzuki 2009	Birthweight discordance cut‐off did not match research question.
Weissmann‐Brenner 2012	Birthweight discordance cut‐off did not match research question.
Xu 1995	Research question did not include the reference standard.