Selection Process and Data Extraction Process
The titles and abstracts of all the retrieved articles were
independently analyzed by two reviewers, and a third reviewer solved
instances of disagreement. Articles whose abstracts did not provide
sufficient information were selected for full-text analysis. Following
selection based on titles and abstracts, the same reviewers
independently selected articles based on full-text analysis. Data
extraction was performed in duplicate by the same two reviewers, and a
third reviewer solved instances of disagreement, who used a standardized
form for this purpose. The following data were extracted: authors, year
of publication, country of the research, study design, sample size,
prematurity categorization, assessment tool, DCD criteria cut-off point,
and prevalence of DCD.