Table 1.

Search strategies used.

Areas	Search String
Sleep—total publications	TS=(sleep)
Sleep—meta-analyses	TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses) AND TS=(sleep)
Cardiology	SU=(cardiology) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)
Neurology	SU=(neurology) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)
Psychiatry	SU=(psychiatry) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)
Pulmonology	SU=(respiratory system) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)
Otorhinolaryngology	SU=(otorhinolaryngology) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)
Pediatrics	SU=(pediatrics) AND TI=(meta-analysis OR meta-analyses OR metanalysis OR metanalyses)

SU, TI, and TS refer to the Web of Science research tags for research area (SU = subject), title (TI), and topic (TS). The search words are restricted to words used in the title, in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses recommendations.