Table 2: Methodological quality of studies (CONSORT checklist).

Reported page number of each item*1
AbstractsMethodRandomizationResultsDiscussion
Number Author Year Title and abstract Introduction Participant Intervention Objective Outcome Sample size Sequence generation Allocation concealment Implementation Blinding Statistical methods Participant flow Recruitment Baseline data Numbers analyzed Outcomes and estimation Ancillary analyses Adverse events Interpretation Generalisability Overall evidence
12345678910111213141516171819202122

1Wan et al.1998252525252425UUUUUUUU252626UU27U27
2Zhao et al.1999585585585586585586UUUUU586U585585585586U587587587587
3Ji200010101011U11UUUUUUU1010U11UU11U11
4Lu et al.2000290290290290290290UUUUU290UU290290290UU290U290
5Luo2001470U470470470471UUUU470471U470470472472472U472473473
6Zhang et al.2001U515151U51UUUUUUU51515252U52525252
7Zhou and Yi2001141414141414UUUUUUUU141515UU15U15
8Cao et al.2002808080808080UUUU8081U80808181U8181U81
9Hong et al.2002U333U3UUUUU3U33444U555
10Huang et al.2002301301301302301302UUUUU302UU302301302UU303303303
11Liu et al.2002526526526526526526UUUUUUU526526U527UU527U527
12Wang et al.2002U295296296U296UUUUUUU295295296296UU296U296
13Yang et al.2002484849494849UUUU4849UU484949UU505151
14Cai et al.2003482482482482482482U482UUU483UU482483483U483483483483
15Guo et al.2003U931931931U931UUUUUUUU931931931UU931U931
16Jia et al.2003202020202021UUUUU21U20202121U2122U22
17Cheng et al.2004161616161616UUUUU16UU161717UU171717
18Liao et al.2004112112112113112113UUUUU113U113112113113U113113114114
19Shen and Du2004414142424142UUUUU42U42424243UU434343
20Wang et al.2004679679679680679680U680680680680680681U679680680U681681681681
21Wang et al.2004169116911691169216911692UUUUU1692U1691169116921692UU1693U1693
22Wu et al.2004333333UUUU33UU344U44U4
23Yu et al.2004424424424424424424UUUU424UU424424425425U425425425425
24Zhao2004899989UUUUU9U9999U99U10
25Feng et al.2005520520520520520520UUUUU521U520520521521UU521522521
26Liu2005505050505050UUUUU505150515151U51515151
27Liu et al.20051052105210521052U1052UUUUU1053U1053105210531053U1054105410541054
28Liu and Chen2005181818191819UUUUU19UU181919UU20U20
29Tang et al.2005426426426427426427UUUUU427U426426427427U427427427427
30Wang et al.200593U93949394U9494U9494U93949494U9594U94
31Wang, Chen and Bai2005333334UUUUU4U3334UU455
32Wang et al.2005260260261261260261UUUU261261UU260261261U261262U262
33Wang2005404040404040UUUUU40U40404041UU414141
34Zhou et al.2005111111111112UUUUU12U11111212UU13U13
35Gao2006141414141415UUUUUUU14141515UU16U16
36Hao et al.2006424424424424424424UUUUU425UU424425425U425425U425
37Li et al.200648484848U48UUUUU48U48484848UU494949
38Mou2006160716071607160716071607UUUUUUUU160716071607U1607UU1607
39Shi and Wang2006200200200200200200U200UU200200UU200201201UU201201201
40Zhang and Lu2006680680680680680681UUUUUUUU680681681UU681681681
41Chen et al.2007866866866867866867U867UU867867U866866867867UU868868868
42Cui et al.2007646464646464U64UUU65U6464U65UU65U65
43He200760U6060U60UUUU6060UU606060U6161U61
44Jin et al.2007165716571657165816571658UUU165816581658UU165716581658U1659165916591659
45Yan200741U41414141UUUUUUUU414141UU414142
46Chang2008241240240241240241UUUUUUU240241241241U241241U241
47Li et al.2008369369369370369370UUUUU370U369369370370U371371371371

Key *1: U = the relevant item was not found in the paper.