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Table 3 Bivariate relationships between covariates and gingival status

From: Prioritization of predisposing factors of gingival hyperplasia during orthodontic treatment: the role of amount of biofilm

Variables Presence of gingival overgrowth (n) p
Yes No
Sex
Girls 55 70 0.035
Boys 41 27
Age
9–13 11 3 0.18
13–19 56 39
> 20 29 55
Ethnicity
Caucasian 50 54 0.56
Maghreb 34 29
African 12 12
Asian people 0 2
General health problem
None 81 86 0.41
Not related to oral health 8 4
Related to oral health 8 6
Mouth breathing
Yes 82 71 0.04
No 14 26
Presence of plaque
None 5 19 0.004
Little 31 36
Visible 47 37
Large amount 13 5
Frequence of brushing
At least twice a day 87 89 0.89
Once a day or less 9 8
Periodontal phenotype
Thick 36 23 0.043
Thin 60 74
Type of bracket
Metal 90 80 0.021
Ceramic 6 17
Orthodontic arch
With nickel 26 35 0.18
Without nickel 70 62
Type of ligature
Elastomerics 63 45 0.0071
Metal or self-ligating 33 52
Duration of treatment
Less than 1 year 53 42 0.022
Between 1 and 2 years 47 20
More than 2 years 25 6