Outcome reported Study
Waller et al. [32] Stott-Miller et al. [46] Watkins et al. [58]
Cleft palate
(isolated + non isolated) 		+ + +
Cleft lip/palate
(isolated + non isolated) 		+ + +
Cleft palate
(non isolated) 		+ - -
Cleft lip/palate
(non isolated) 		+ - -
Cleft palate
(isolated) 		+ + -
Cleft lip/palate
(isolated) 		+ + -