Table 1.

Basic characteristics of included studies

Study	Trial design	No. of patients	Interventional method	Duration (wk)	Randomized allocation/double-blind/description of withdrawn and dropouts	Jadad score
Badiali et al[11]	Double-blind crossover	24 (adults)	Bran 20 g (fiber 12.5 g) vs placebo	4	Y/Y/Y	4
Loening-Baucke et al[12]	Double-blind crossover	31 (children)	Glucomannan 100 mg/kg vs placebo	4	Y/Y/Y	5
Castillejo et al[13]	Double-blind	48 (children)	Fiber supplement 5.2 g (53.2% fiber) 2 or 4 sachets vs placebo	4	Y/Y/Y	5
Chmielewska et al[14]	Double-blind	72 (children)	Glucomannan 2.52 g vs placebo	4	Y/Y/Y	5
Staiano et al[15]	Double-blind	20 (children)	Glucomannan 200 mg/kg vs placebo	12	Y/Y/Y	4