Use of music during colonoscopy: An updated meta-analysis of randomized controlled trials

Table 1 Description of studies included in the meta-analysis

Ref.	Publication year	Number of patients	Type of study	Type of music
De silva et al[26]	2016	118	RCT	Variety per patient
Martindale et al[33]	2013	119	RCT	Classical
Costa et al[19]	2010	110	RCT	Variety per patient
Bechtold et al[35]	2006	29	RCT	Watermark by Enya
Ovayolu et al[18]	2006	32	RCT	Turkish classical
Harikumar et al[28]	2006	166	RCT	Choice of 6 styles (headphones)
Uedo et al[39]	2004	60	RCT	Easy-listening
López-Cepero Andrada et al[25]	2004	78	RCT	Classical
Smolen et al[32]	2002	34	RCT	Variety per patient
Schiemann et al[38]	2002	133	RCT	Variety radio station
Lee et al[29]	2002	109	RCT	Variety per patient

RCT: Randomized controlled trial.

Table 2 Quality assessment summary of all included studies

Ref.	Study design	Random sequence generation	Allocation con-cealment	Blinding	Blinding outcome assessment	Incomplete outcome data	Selective reporting	Other bias	Quality assessment
De silva et al[26], 2016	RCT	Adequate	Adequate	Double-blinded	Adequate	None	None	None	High
Martindale et al[33], 2013	RCT	Adequate	Adequate	Double-blinded	Adequate	None	None	None	High
Costa et al[19], 2010	RCT	Adequate	Inadequate	Single-blinded	Adequate	None	None	None	Moderate
Bechtold et al[35], 2006	RCT	Adequate	Not described	None	Inadequate	None	None	None	Low
Ovayolu et al[18], 2006	RCT	Adequate	Adequate	Double-blinded	Adequate	None	None	None	High
Harikumar et al[28], 2006	RCT	Adequate	Adequate	Single-blinded	Adequate	None	None	None	Moderate
Uedo et al[39], 2004	RCT	Not described	Not described	Double-blinded	Adequate	None	None	None	Low
López-Cepero Andrada et al[25], 2004	RCT	Not described	Adequate	Double-blinded	Adequate	None	None	None	Moderate
Smolen et al[32], 2002	RCT	Not described	Adequate	Double-blinded	Adequate	None	None	None	Moderate
Schiemann et al[38], 2002	RCT	Not described	Adequate	Double-blinded	Adequate	None	None	None	Moderate
Lee et al[29], 2002	RCT	Not described	Adequate	Double-blinded	Adequate	None	None	None	Moderate

RCT: Randomized controlled trial.