Implications for clinical practice and future research
We did not find evidence to support the widespread use of the intervention, but our subgroup and sensitivity analyses suggest that the intervention may hold promise in some clinical groups. Our post hoc analyses were underpowered but provided a signal that the intervention held some promise under non-pandemic conditions. Future research should seek to confirm these signals and develop interventions tailored to the clinical needs of nurses, larger sites, younger children, and socioeconomically deprived communities, in post-pandemic conditions.