Table 2

 Effect of the type of feeding and non-nutritive sucking on open bite in 1099 preschool children

Group of childrenOpen biteLogistic regression OR (95% CI)p value
Yes (%)No (%)
NNS+, children with non-nutritive sucking activity for more than 1 year; NNS−, children without non-nutritive sucking.
Bottle feeding64 (14)395 (86)0.93 (0.65 to 1.33)0.678
Breast feeding80 (13)560 (87)
NNS+128 (17)609 (83)4.61 (2.69 to 7.92)<0.0001
NNS−16 (4)346 (96)