. 2013 Sep 3;2013(9):CD009128. doi: 10.1002/14651858.CD009128.pub3

1. Overview of study populations.

Characteristic	Intervention(s) and comparator(s)	Sample  size	[N]  Screened/  eligible	[N]  Randomised	[N] Safety	[N]  ITT	[N]  Finishing study	[%]   Randomised finishing study	Follow‐up^a
Ludvik 2002	I1: 2 g powdered white‐skinned   sweet potato (Ipomoea batatas)   tablet	‐	‐	6	6	‐	6	100	6 weeks
	I2: 4 g powdered   white‐skinned  sweet potato (Ipomoea batatas)  tablet			6	6		6	100
	C: Placebo			6	6		6	100
	Total:			18	18		18	100
Ludvik 2004	I: 4 g of Caiopo   (Ipomoea batatas) tablet	‐	‐	30	30	‐	30	100	3 months
	C: Placebo			31	31		31	100	3 months
	Total:			61	61		61	100
Ludvik 2008	I: 4 g of Caiopo   (Ipomoea batatas) tablet	21	‐	‐	‐	‐	27	N/A	5 months
	C Placebo	21	‐	‐	‐		34	N/A	5 months
	Total:	42	88		‐		61	69.3
*Grand total*	*All interventions*			**I1: 63 + ?   I2: 6**			**I1: 63   I2: 6**
	*All comparators*			*71 + ?*			71
	*All interventions and comparators*			*140 + ?*			*140*

^aDuration of intervention and/or follow‐up under randomised conditions until end of study

"‐" denotes not reported

"+ ?" denotes number of unreported participants who took part in the study

C: comparator; I: intervention; ITT: intention‐to‐treat; N/A: not applicable