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
RCT = randomized controlled trial.
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