Study	Reason for exclusion
Agboatwalla 1997	This was a non‐randomised controlled trial and therefore was excluded
Ahluwalia 2000	This was a non‐randomised cohort study conducted in Georgia State (USA) and therefore was excluded
Alexandre 2007	This was a non‐randomised cohort study conducted in France and therefore was excluded
Ayiasi 2015b	This trial reported only on use of contraceptive during the trial period; no other relevant outcomes on neonatal survival, therefore this trial was excluded
Bang 1990	This was a non‐randomised controlled trial and therefore was excluded
Bang 1999	This was a non‐randomised controlled trial and therefore was excluded
Baqui 2015	This trial was mainly on antibiotic provision for young infants and had no educational component. Also this study did not report on neonatal outcomes only and therefore was excluded
Bartington 2006	This cohort study was conducted in hospitals of the UK and therefore was excluded
Bhandari 2003	This was a cluster‐randomised controlled trial in which infants were enrolled within 72 hours (70%) and 1 week (90%) of life. However, outcomes were assessed at 6 months of age, and the trial was therefore excluded
Bhandari 2004	This was a cluster‐randomised controlled trial in which neonates were enrolled. Main intervention was to promote appropriate complementary feeding practices during infancy. However, outcomes were assessed at 3, 6, 9, and 18 months of age. Because outcomes were not assessed in neonates, this study was excluded
Bhattacharya 1988	Target population was mothers of children younger than 6 years of age, and outcomes were assessed for children younger than 6 years of age. Main intervention was education of mothers and family members about identification of diarrhoea, signs of dehydration, and rehydration with home‐made salt‐sugar solution. This study was excluded because it did not mention any disaggregated data for neonates
Bhopal 2017	This is an abstract that provides insufficient information on outcomes for neonates only; therefore it was excluded
Bhutta 2009	The primary objective of this study was to study the impact of multiple micronutrient supplementation interventions among women of reproductive age; it was therefore excluded
Bland 2008	This was a non‐randomised cohort study in which exclusive breastfeeding was promoted. Outcomes were assessed at 6 months of age; therefore this study was excluded
Bolam 1998	This study was conducted in a 250‐bed hospital and was therefore excluded
Boulvain 2004	This randomised controlled trial was conducted in Switzerland and was therefore excluded
Carlo 2010	This was a before‐and‐after study and was therefore excluded
Castrucci 2007	This cross‐sectional study was conducted in a hospital in Philadelphia and was therefore excluded
Chapman 2004	This study was conducted in a hospital setting of a developed country (USA) and was therefore excluded
Coombs 1998	This study was conducted in a developed country (USA) and was therefore excluded
Coskun 2009	This study was conducted in a hospital setting and was therefore excluded
Davies‐Abetugbo 1996	Education provided involved promotion of breastfeeding alone; therefore this study was excluded
Dearden 2002	Education provided involved promotion of breastfeeding alone; therefore this study was excluded
Dennis 2001	This was a literature review and was therefore excluded
Di Napoli 2004	This study was conducted in a developed country (Italy) and was therefore excluded
Escobar 2001	This randomised controlled trial was conducted in a developed country (USA) and was therefore excluded
Flax 2009	This study focused only on breastfeeding and was therefore excluded
Foreit 1993	This randomised controlled trial was conducted in a hospital setting and was therefore excluded
Forster 2004	This randomised controlled trial was conducted in a hospital setting in a developed country (Australia) and was therefore excluded
Froozani 1999	This was a quasi‐experimental hospital‐based study and was therefore excluded
Gill 2007	This quasi‐experimental study was conducted in the maternity clinics of a developed country (USA) and was therefore excluded
Gill 2011	This study had no component on educational intervention and therefore was excluded
Gross 2009	This cross‐sectional study was conducted in a developed country; it was therefore excluded
Grossman 2009	This quasi‐randomised study was conducted in a hospital setting in a developed country (USA) and was therefore excluded
Guise 2003	This systematic review examined whether primary care‐based interventions improve initiation and duration of breastfeeding. The review included studies from developed countries only and was therefore excluded
Haider 1996	This was a hospital‐based study and was therefore excluded
Haider 2000	This randomised controlled study was conducted to promote breastfeeding alone and was therefore excluded
Hannula 2008	This systematic review was conducted in a developed country to examine professional support interventions for breastfeeding in a hospital setting and was therefore excluded
Hoare 1999	In an educational session, mothers of children 3 years of age were included to participate; this study was therefore excluded
Hoddinott 2006	This study was conducted in a developed country (Scotland) and was therefore excluded
Hotz 2005	All mothers with children 4 to 23 months of age in these communities were invited to participate in nutrition education; therefore this study was excluded
Ickovics 2007	This study was conducted in a hospital‐based setting in a developed country (USA) and was therefore excluded
Ingram 2004	This study was conducted in a developed country (UK) and was therefore excluded
Ingram 2009	This study was conducted in a developed country (UK) and was therefore excluded
Jang 2008	This quasi‐randomised study was conducted in a hospital setting and was therefore excluded
Johnson 2017	The intervention was based on contraceptive use only and the study included no outcomes on neonatal survival; therefore it was excluded
Kadam 2005	This randomised controlled trial was conducted in a hospital setting and was therefore excluded
Kafatos 1989	This randomised controlled trial was conducted to study the effect of a nutritional intervention programme among pregnant women and was conducted in a developed country (Greece); therefore it was excluded
Kafatos 1991	This study was from a developed country (Greece) and was therefore excluded
Kimani‐Murage 2015	This study did not report on primary or secondary outcomes and therefore was excluded
Kools 2005	This cluster‐randomised trial was conducted to study promotion and support of breastfeeding in a developed country (Netherlands) and was therefore excluded
Lin 2008	This quasi‐experimental study on the effectiveness of an antenatal education programme for breastfeeding outcomes was conducted in a developed country (Taiwan) and was therefore excluded
MacArthur 2009	This study was conducted in a developed country (UK) and was therefore excluded
Martens 2002	This study was conducted in a developed country (USA) and was therefore excluded
Merewood 2003	This study was conducted in a hospital setting of a developed country (USA) and was therefore excluded
Moran 2006	This was a cross‐sectional study and was therefore excluded
Mottl‐Santiago 2008	This retrospective cohort was conducted at a tertiary care centre in a developed country (USA) and was therefore excluded
Murihead 2006	This study was conducted in a developed country (Scotland) and was therefore excluded
Nabulsi 2014	This is a study protocol with an outcome of knowledge of breastfeeding at 6 months; it was therefore excluded
Nair 2017	This is a randomised controlled trial focused on infant and child outcomes and was therefore excluded
Nichols 2009	This study was conducted in a hospital setting of a developed country (Australia) and was therefore excluded
Petrova 2009	This study was conducted in a developed country (USA) and was therefore excluded
Philipp 2001	This quasi‐randomised study was conducted in a developed country (USA) and was therefore excluded
Pobocik 2000	This study was from a developed country (Guam) and was therefore excluded
Quinn 2005	This was not an experimental study; therefore it was excluded
Raghupathy 1996	In this study, national data were compared and analysed; the study was therefore excluded
Rahman 2008	The objective of this study was not to improve neonatal survival; therefore it was excluded
Raj 2016	The objective of this study was to improve gender equity and family planning; therefore it was excluded
Rawat 2017	This study explored complementary feeding and was therefore excluded
Rishel 2005	This retrospective study was conducted in a developed country (USA) and was therefore excluded
Rosato 2006	This was a qualitative review and was therefore excluded
Rosen 2008	This retrospective cohort study was conducted in a hospital setting of a developed country (USA) and was therefore excluded
Rossiter 1994	This study was conducted in a hospital setting of a developed country (Australia) and was therefore excluded
Roy 2007	This was a randomised controlled trial in which children aged 6 to 9 months were recruited; therefore it was excluded
Russell 1999	This retrospective study was conducted in a hospital setting of a developed country (USA) and was therefore excluded
Ryser 1999	This non‐randomised controlled trial was conducted in a developed country (USA) and was therefore excluded
Ryser 2004	This trial was from a developed country (USA) and was therefore excluded
Sachdeva 1994	This study focused on nutrition in infants and therefore was excluded
Sandy 2009	This study was conducted in a developed country (USA) and was therefore excluded
Schneider 2001	This study was conducted in a developed country (Australia) and was therefore excluded
Seema 1997	This prospective study was conducted in hospitalised infants and was therefore excluded
Serwint 1996	This randomised controlled trial was conducted in a hospital setting and was therefore excluded
Shaw 1999	This study was conducted in a developed country (USA) and was therefore excluded
Shinwell 2006	This prospective cohort study was conducted in a hospital setting and was therefore excluded
Shrestha 2016	Counselling was provided to women in a hospital; therefore this study was excluded
Sloan 2008	Both groups received intervention on essential newborn care, with additional intervention on kangaroo mother care in the intervention arm; therefore this study was excluded
Stille 2001	This study was from a developed country (USA) and was therefore excluded
Susin 2008	This controlled clinical trial was conducted in a hospital setting and was therefore excluded
Svenson 2009	This randomised controlled trial was conducted in a hospital setting of a developed country (Australia) and was therefore excluded
Syed 2006	This was not a randomised controlled trial; therefore it was excluded
Syed 2008	This was a review and was therefore excluded
Tshefu 2015	This study had no educational component and was therefore excluded
Tylleskär 2011	This randomised controlled study was conducted to promote breastfeeding alone and was therefore excluded
Volpe 2000	This study was conducted in a developed country (USA) and was therefore excluded
Warren 2010	This was a before‐and‐after study; therefore it was excluded
Whitelaw 1988	This study was from a developed country (UK) and was therefore excluded
Wong 2007	This study was conducted in a hospital setting of a developed country (Hong Kong) and was therefore excluded
Yun 2010	This study was conducted in a developed country (USA) and was therefore excluded
Zaidi 2012	This study had no educational component and was therefore excluded
Zaidi 2013	This study had no educational component and was therefore excluded