Systematic search and strategy
The meta-analysis was carried out
by the Preferred Reporting Items for Systematic Reviews and
Meta-analysis (PRISMA)[9]. After inception and before May 2022,
PubMed, Embase, Web of Science, EBSCO, Cochrane, Scopus, and CNKI were
among the databases searched for relevant articles. The search strategy
addressed two of five elements of the PICOS model (Population,
Intervention/Exposure). Using Boolean operators, the search technique
merged two areas as MeSH terms, keywords, and text words: (”Caffeine
Citrate” OR ”Caffeine” OR ”Citrates”) AND (Apnea) AND (”Preterm Infants”
OR ”Infant, Premature” OR ”Very Low Birth Weight Infants ” OR ” Infant,
Low Birth Weight ” OR ” Neonatal Prematurity”)