Study	Reason for exclusion
Bian 2003	Not RCT. Control children had normal diet. Study duration of 21 months.
Bánóczy 1985	Not RCT. Test children used collectively a particular fluoridated toothpaste, but control group used different fluoridated and non‐fluoridated toothpastes alternatively.
Gyurkovics 1992	Not RCT. Study duration of 12 years, including 2‐year interruption of supply of fluoridated milk.
Ketley 2003	Not RCT
Kouzmina 1999	Not RCT
Legett 1987	Not RCT. Study direction of 3 years including 10‐month lapse of delivery of fluoridated milk.
Light 1958	Not RCT
Lopes 1984	Cluster RCT. Insufficient study duration (16 months) (published in Portuguese).
Mariño 2001	Not RCT
Mariño 2007	The cost‐effectiveness paper of an excluded non‐RCT (Mariño 2001).
Pakhomov 1993	Not RCT
Pakhomov 1995	Not RCT
Pakhomov 2005	Not RCT (published in Russian).
Pakhomov 2011	Not RCT (published in Russian).
Petersson 2011	RCT. Milk with probiotic bacteria. Insufficient study duration (15 months).
Riley 2005	Not RCT
Rusoff 1962	Not RCT
Stecksén‐Blicks 2009	Cluster RCT. Milk with probiotic bacteria. Study duration of 21 months.
Stephen 1984	Quasi‐randomised RCT. Correspondence with the author suggested that allocation was undertaken as per children's alternate alphabetical order within each subgroup.
Weitz 2007	Not RCT. Positive control group had ongoing APF‐gel programme.
Ziegler 1964	Not RCT (published in German). Participation was on an optional basis.

APF: acidulated phosphate fluoride; RCT: randomised controlled trial.