Table 2.

Quality Features of Articles Included for Review

Source	Randomized	Double- Blinded	Description of Dropouts	Design	Description of Allocation Concealment	Power Analysis	Intention to Treat
Charles et al,12 2000	Yes	Yes	Yes	RCT	Indeterminant	Yes	Yes
Charles et al,13 1998	Yes	Yes	Yes	RCT	Indeterminant	No	No
Fontbonne et al,14 1996	Yes	Yes	Yes	RCT	Indeterminant	Yes	Yes
Guigliano et al,15 1993	Yes	Yes	Yes	Crossover	Indeterminant	Yes	No dropouts
Kantola et al,16 2002	Yes	Yes	Yes	RCT	Yes	Yes	No
Lawson et al,17 1970	Yes	Yes	Yes	Crossover	Indeterminant	No	No
Lehtovorta et al,18 2001	Yes	Yes	Yes	RCT	Indeterminant	Yes	No dropouts
More et al,19 1999	Yes	Yes	Yes	Crossover	Indeterminant	No	Yes
Paolisso et al,20 1998	Yes	Yes	Yes	RCT	Indeterminant	No	No dropouts

RCT = randomized controlled trial.