Table 1

Characteristics of studies included in the systematic review and/or meta-analysis

ReferenceCountryStudy designPopulationSurgical interventionOutcomePostoperative speech language therapy
Sample sizeSample ageCategoriesFeeding improvingTongue protrusionNipple pain
First author’s name and year of publicationCountryDesign of the studyNumber of participantsAge of participants
Different surgical methods (laser, Z-plasty, total excision of frenulum)Compare the pre-surgical and post-surgical procedureCompare the pre-surgical and post-surgical procedurePain score
YesNoNot informed
  • NRS, Numerical Rating Scale; VAS, Visual Analogue Scale.