Table 2.

Quality Review of Studies Included in Meta-analysis.^a

			Technique Reporting		VHI
Author	Patient Selection	Treatment Selection	XRT	TLM	Administration	Language	Type	Newcastle- Ottawa
Dinapoli et al29	No exclusion criteria given	Patient preference, except anatomic / medical reasons	Not specified	CO2 laser	Patients completed at clinic visit	Italian	VHI-30	4
Loughran et al30	Excluded multiple modalities or recurrence	NR	Conventional	CO2 laser	Patients completed on own, help as needed in clinic	English	VHI-30	7
Luo et al35	Consecutive enrollment Excluded multiple modalities or recurrence	Patient preference except anatomic / medical reasons	Conventional	CO2 laser, ELS class	Patients completed after instruction by research nurse	Chinese	VHI-10	7
Nunez Batalla et al31	All patients free of disease at time of study	NR	Not specified	CO2 laser, ELS class	Patients completed independently	Spanish	VHI-30	3
	No additional exclusion criteria
Oridate et al32	Definitive therapy only Excluded recurrence	NR	Conventional	Laser type not specified, ELS class	NS	Japanese	VHI-10	2
Sjogren et al33	Consecutive enrollment	Year of treatment, historical radiation treatment group	Conventional	Laser type not specified, ELS class	Patients completed independently	Dutch	VHI-30	6
	Excluded patients with anterior commissure involvement
	Excluded multiple modalities or recurrence
	Excluded patients not eligible for both
Tomifuji et al36	Consecutive enrollment	Patient preference	Not specified	CO2 laser, ELS class	NS	Japanese	VHI-30	6
	Excluded recurrence after author communication
Taylor et al34	Prospective patient enrollment	Patient preference based on tumor board recommendation	Not specified	Laser type not specified	NS	1 English	VHI-10	4
	All patients T1b

Abbreviations: ELS, European Laryngological Society; NR, not reported; NS, not specified; Pts, patients; VHI, Voice Handicap Index.

^aShaded cells indicate possible sources of bias.