Association between breastfeeding duration, non-nutritive sucking habits and dental arch dimensions in deciduous dentition: a cross-sectional study

Progress in Orthodontics

Table 2 The distribution of malocclusion according to non-nutritive sucking habits

Parameters	Sucking habit (n = 63)	No sucking habit (n = 352)	Pvalue
Breastfeeding <6 months
Open bite	1 (3.1)	0	0.203 (NS)
Crossbite	0	20 (15.9)	0.014 (S)
Breastfeeding ≥6 months
Open bite	0	2 (0.9)	0.999 (NS)
Crossbite	1 (3.2)	4 (1.8)	0.477 (NS)
Overall
Open bite	1 (0.5)	2 (2.5)	0.379 (NS)
Crossbite	1 (3.8)	24 (21.2)	0.108 (NS)

Values are n (% of cases). P value was obtained using a chi-square test. P < 0.05 was considered to be statistically significant. Non-nutritive sucking is a composite status of digit, thumb and dummy sucking. S, statistically significant; NS, statistically non-significant.