Probiotic supplementation decreases intestinal transit time: Meta-analysis of randomized controlled trials

Table 3 Assessment of study quality

Ref.	Jadad scale
	Randomization(range: 0-2)	Double blinding(range: 0-2)	Subject account(range: 0-1)	Total score1(range: 0-5)
Agrawal et al[14]	1	2	1	4
Bartram et al[15]	1	2	0	3
Bouvier et al[16]	1	2	0	3
Holma et al[17]	1	0	1	2
Hongisto et al[18]	1	0	0	1
Malpeli et al[19]	0	2	1	3
Marteau et al[20]	1	2	1	4
Rosenfeldt et al[21]	1	1	0	2
Rosenfeldt et al[21]	1	1	0	2
Sairanen et al[22]	1	1	0	2
Waller et al[23]	2	2	1	5
Waller et al[23]	2	2	1	5
Krammer et al[24]	1	1	1	3

¹Higher scores represent better study quality.