Table 3.

Differences between 2016 and update systematic review

	Systematic review on behalf of the German Federal Ministry of Health 2016	Systematic review planned 2017
Language	German	English
Publication	Website of the German Federal Ministry of Health	International peer reviewed journal
Grey literature search	None	Google Scholar
Risk of bias assessment in non-randomized studies	Newcastle-Ottawa Scale	ROBINS-I tool for non-randomized studies
Comparison	Comparison of the 37th–38th pregnancy week to ≥ 39th pregnancy week	Time-response analysis including 37th until 42nd pregnancy week including steps of 1 week
Meta-analysis	Mantel-Haenszel test considering random effects	Time-response analysis, see section data synthesis
Software	Review Manager 5.3	R 3.3.2 + metaphor and dosresmeta package
Results	NICU admission (primary outcome): higher rate in the 37th–38th weeks group (relative risk 1.78 [95% CI 1.55, 2.06])	–