Table 1.

Characteristics of selected studies.

References	Study design	Quality score	Simple size	Age	Questionnaire
Cohen et al. (54)	Randomized Controlled Trial	moderate	78	6–8 year old	CEBQ(43)
Balantekin et al. (55)	Interrupted time series without comparison group	moderate	241	7–11 years old	ChEDE (40) YEDE-Q (41, 42)
Halberstadt et al. (56)	Interrupted time series without comparison group	weak	120	8–19 years old	DEBQ (39)
Adam et al. (57)	Interrupted time series without comparison group	weak	604	10 – 15 years old	TFEQ (44)
Raimunda Damaso et al. (58)	Interrupted time series without comparison group	moderate	97	15−19 years old.	BES (45) BITE (46)
De Niet et al. (59)	Randomized Controlled Trial	moderate	144	8–12 years old.	DEBQ (39)
Bishop-Gilyard et al. (60)	Randomized double blinded placebo–controlled trial	moderate	82	13–17 years old	QWEP (49) EI (50)
Goossens et al. (61)	Interrupted time series without comparison group	weak	108	10–17 years old	ChEDE (40)
Sarvestani et al. (62)	Non Randomized Controlled Trial	moderate	60	11-15 years old.	DEBQ (39)