Inclusion and exclusion criteria for literature in the systematic review
| Included | Excluded | |
| Population of interest | Newborns (0–28 days after birth)7 living in humanitarian settings in low-income and middle-income countries. | Populations living in humanitarian setting in high-income countries. |
| Intervention | Any intervention directly aimed at improving newborn health outcomes as defined by the MISP and the Field Guide as per table 1. | Any intervention not included in the MISP and Field Guide, prepartum and intrapartum interventions and other sexual and reproductive health interventions not impacting newborn health. |
| Outcome | Studies reporting on the use or effectiveness of interventions that affect newborn health. | Studies that do not report on the use or effectiveness of newborn health interventions. |
| Situation | Studies conducted during acute or protracted humanitarian crises (armed conflict, disease outbreak, natural disaster). | Studies conducted before or after the crisis has fully stabilised (ie, no longer a protracted crisis). |
| Type of study | Quantitative, qualitative and mixed methods studies describing a newborn health intervention, including or not an evaluation of an outcome, and reporting empirical data. | Any other types of studies not reporting empirical data, for example, comments, opinion pieces. |
| Type of publication | Peer-reviewed and grey literature. | Other types of publications, for example, media articles, blogs. |
| Publication date | 1 January 1990–15 November 2021. | Any publication published before 1 January 1990. |
| Language | English, Portuguese, Spanish, French. | Other languages. |
MISP, Minimum Initial Service Package.