Table 1.

Inclusion/exclusion criteria.

INCLUSION CRITERIA
Type of study	Randomized/non-randomized trials, cohort studies, cross-sectional, case control, prospective, retrospective studies
Cohort	Patients treated for oral cancer
Sample	≥10
Data	Quality of life assessed by using both EORTC QLQ-C30 and EORTC QLQ-H&N35/43
Timing	Evaluation of HRQOL performed after at least 12 months since treatment
EXCLUSION CRITERIA
Type of study	Case series, case reports, reviews, letters, technical notes, conference documents, books, book chapters, editorials, surveys
Cohort	Studies on patients treated for non-oral/oropharyngeal cancers without stratification. Studies on non-treated patients
Sample	<10
Data	Studies using other HRQOL evaluation tools
Timing	Last HRQOL assessment performed before 12-months post-treatment