Quantitative Data Integration Analysis Method for Cross-Studies: Obstructive Sleep Apnea as an Example

Table 1

Extracted relevant data.

Extracted information	Details
General publication data	DOI
	First author
	Journal and year of publication
	Geographical origin
Study design	Randomized controlled trial (RCT)
	Clinical trial (CT)
Duration of study	Time interval
	Time follow-up
Demographic variables	Sample size of case and control profile
	Age
	Number of males and females
Intervention methods	Mechanical intervention (such as CPAP)
	Physical intervention (such as tonsillectomy and exercise therapy)
	Drug intervention (such as eszopiclone)
	Psychological intervention (such as continuous antidepressant treatment)
	Other interventions (such as low calorie intake strategies and normal lifestyle)