Table 1.

Jadad scale for reporting randomized controlled trials (1 = yes, 0 = no, -1 = no description).

Author	1) Is the study described as randomized?	2) Is the study described as double blind?	3) Is there a description of withdrawals and dropouts?	4) The method of randomisation is appropriate?	5) The method of blinding is appropriate?	Total score=
Krahwinkel 2000 [49]	0	1	1	−1	1	2
Hirasawa 2002 [30]	1	0	1	1	−1	2
Awadalla 2011 [47]	0	0	1	−1	−1	−1
Ferrazzano 2011 [48]	1	0	1	1	−1	2
Kudva 2011 [27]	1	0	0	1	−1	1
Tehrani 2011 [26]	1	1	1	1	1	5
Jenabian 2012 [45]	1	0	0	1	−1	1
Chava 2013 [44]	1	0	1	1	−1	2
Gadagi 2013 [51]	1	0	1	1	1	4
Hattarki 2013 [25]	1	0	1	1	−1	2
Rassameemasmaung 2013 [43]	1	0	1	1	1	4
Hrishi 2014 [19]	1	0	1	1	1	4
Kaur 2014 [50]	1	0	1	1	1	4
Neturi 2014 [14]	1	0	1	1	1	4
Rattanasuwan 2014 [42]	1	1	1	1	1	5
Hambire 2015 [24]	1	1	1	1	1	5
Priya 2015 [23]	1	1	0	1	1	4
Radafshar 2015 [18]	1	1	1	1	1	5
Sarin 2015 [13]	1	1	1	1	1	5
Behfarnia 2016 [17]	1	0	1	1	−1	2
Chopra 2016 [21]	1	0	1	1	−1	2
Thomas 2016 [46]	1	1	1	1	1	5
Hegde 2017 [22]	1	1	1	1	1	5
Shalini 2018 [52]	1	1	0	1	1	4
Taleghani 2018 [28]	1	0	0	1	−1	1
Tripathi 2019 [29]	1	0	0	1	−1	1