A Cochrane review included 27 studies but only 15 studies with a total of 2922 mothers and 388 fathers reported useable data. Education tested included postnatal infant sleep enhancement (5 trials), infant behavior (12 trials), general post-birth health (3 trials), infant safety (4 trials), and father involvement/skills with infants (1 study). Of the outcomes analyzed, only 13 were measured similarly enough by more than one study to be combined in meta-analyses, and only 4 of these had a low enough level of heterogeneity to provide an overall estimate of effect. Education on sleep enhancement resulted in a mean difference of 29 more minutes of sleep in 24 hours (95% CI 18.53 to 39.73, 2 trials, n=376) than usual care. Education on infant behaviour increased maternal knowledge of infant behaviour by a mean difference of 2.85 points (95% CI 1.78 to 3.91; 2 studies, n=56).
Comment: The quality of evidence is downgraded by several issues in study quality and by imprecise results (over 90% of the weighted results of sleep enhancement are due to 1 trial).