Table 7.

Number of dropout participants from the included studies and the reasons for dropout (4 studies).

Study	No. of dropouts	Reason(s) for dropping out
Minkoff and Axelrod [99]	4 out of 61	3 had minor side effects upon use of active product 1 for personal reasons
Schiff et al. [101]	9 out of 67	For reasons unrelated to dentifrice use
Schiff et al. [102]	9 out of 48	For reasons unrelated to dentifrice use
Sowinski et al. [105]	All participants completed	No dropouts recorded