A systematic review and meta-analysis of randomized controlled trials of palliative care for pain among Chinese adults with cancer

Table 2 Assessment of study quality

Studies	Quality Indicators from the modified Jadad scale					Total score
Studies	A	B	C	D	E	Total score
Li, 2006 [30]	1	1	0	0	1	3
Huang, 2010 [28]	1	0	0	1	1	3
Xu, 2014 [35]	1	1	0	0	0	2
Kang, 2015 [29]	1	1	0	1	1	4
Wu, 2015 [33]	1	0	0	1	0	2
Liu, 2016 [31]	1	0	0	0	1	2
Su, 2016 [25]	1	1	0	1	1	4
Fei, 2016 [24]	1	1	0	0	1	3
Wu, 2017 [34]	1	0	0	1	1	3
Luo, 2017 [32]	1	1	0	1	1	4
Gao, 2017 [26]	1	1	0	1	0	3
He, 2017 [27]	1	1	0	1	1	4
Yao, 2017 [36]	1	0	0	0	1	2
Zhang, 2018 [37]	1	1	0	1	1	4
You, 2018 [38]	1	1	0	1	1	4
Rao, 2018 [39]	1	1	0	0	1	3
Cao, 2018 [40]	1	0	0	0	1	2
Yang, 2019 [41]	1	0	0	0	1	2

Abbreviations: A represents “Was the study described as randomized?” (1: Yes; 0: No); B represents “Was the method of randomization appropriate?” (1: Yes; 0: Not described; −1: No); C represents “Was there a description of withdrawals and dropouts?” (1: Yes; 0: No); D represents “Was there a clear description of the inclusion/exclusion criteria?” (1: Yes; 0: No); E represents “Was the methods of statistical analysis described?” (1: Yes; 0: No)

ISSN: 1472-684X