Meta-Analysis
Copyright ©The Author(s) 2020.
World J Meta-Anal. Dec 28, 2020; 8(6): 462-471
Published online Dec 28, 2020. doi: 10.13105/wjma.v8.i6.462
Table 1 Description of studies included in the meta-analysis
Ref.CountryNumber of patients (n)Bowel preparation times (dose 1)Patients per group (n)Bowel preparation scaleSatisfactory bowel preparations (n)OBPS (mean score ± SD)
Parra-Blanco et al[16], 2006Spain88Same day PEG 3 L43Ottawa34ND
Split-dose NaP 45 mL/45 mL45Ottawa36ND
Kang et al[24], 2014South Korea196Same day NaP 1/197Ottawa594.05 ± 1.56
Split-dose PEG 2 L/2 L99Ottawa713.8 ± 1.55
Shah et al[17], 2014India159Same day PEG 2 L80OttawaND6.02 ± 1.34
Split-dose PEG 1 L/1 L79OttawaND5.52 ± 1.23
Cesaro et al[18], 2013Italy101Same day Halflytely 2 L/10-20 mg Bisacodyl50OttawaND2.78 ± 1.95
Split-dose PEG 3 L/1 L51OttawaND3.41 ± 1.90
de Leone et al[19], 2013Italy154Same day Halflytely 2 L/10-20 mg Bisacodyl78Ottawa703.09 ± 2.4
Split-dose PEG 2 L/2 L76Ottawa702.39 ± 2.55
Kim et al[25], 2014South Korea100Same day PEG 4 L50Ottawa414.98 ± 1.78
Split-dose PEG 2 L/2 L50Ottawa424.98 ± 1.57
Kotwal et al[20], 2014United States103Same day PEG 3 L 51OttawaND7.15 ± 3.58
Split-dose PEG 2 L/2 L52OttawaND7.38 ± 3.65
Seo et al[21], 2013South Korea197Same day PEG 2 L97Ottawa723.76 ± 2.07
Split-dose PEG 2 L/2 L100Ottawa753.67 ± 1.57
Zhang et al[23], 2014China318Same day PEG 2 L159Ottawa1264.4 ± 2.7
Split-dose PEG 1 L/2 L159Ottawa1432.9 ± 2.4
Alkhairi et al[26], 2017United States300Same day PEG 4 L142Ottawa142ND
Split-dose PEG 2 L/2 L158Ottawa156ND
Castro et al[22], 2019United States130Same day PEG 4 L65Ottawa34ND
Split-dose PEG 2 L/2 L65Ottawa31ND
Table 2 Quality assessment of studies included in meta-analysis based upon Cochrane’s Collaboration Risk of Bias tool
Ref.Study designRandom sequence generationAllocation concealmentBlindingBlinding outcome assessmentIncomplete outcome dataSelective reportingOther biasQuality assessment
Parra-Blanco et al[16], 2006RCT AdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Kang et al[24], 2014RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Shah et al[17], 2014RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Cesaro et al[18], 2013RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
de Leone et al[19], 2013RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Kim et al[25], 2014RCTNot describedAdequateSingle-blindedAdequateNoneNoneNoneModerate
Kotwal et al[20], 2014RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Seo et al[21], 2013RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Zhang et al[23], 2014RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Castro et al[22], 2019RCTAdequateAdequateSingle-blindedAdequateNoneNoneNoneHigh
Alkhairi et al[26], 2017RCTNot describedNot describedSingle-blindedAdequateNoneNoneNoneModerate