Effectiveness of probiotics in irritable bowel syndrome: Updated systematic review with meta-analysis

Table 1 Jadad quality score of randomized controlled trial included in the meta-analysis

Study	Randomization	Blinding	Withdrawals and dropouts	Total score
Kajander et al[33]	2	2	1	5
Williams et al[32]	1	2	1	4
Zeng et al[39]	1	2	1	4
Enck et al[35]	1	1	1	3
Drouault-Holowacz et al[37]	2	2	1	5
Sinn et al[42]	2	2	1	5
Enck et al[36]	1	2	1	4
Simrén et al[40]	2	2	1	5
Sondergaard et al[43]	2	2	1	5
Guglielmetti et al[44]	2	2	1	5
Ducrotté et al[45]	1	2	1	4
Kruis et al[34]	2	2	1	5
Ki cha et al[38]	2	2	1	5
Dapoigny et al[46]	1	2	1	4
Roberts et al[41]	2	2	1	5