Table 1.

Distribution (%) of explanatory variables included in the questionnaire

		%
Social factors
Gender	Boy	51.15
	Girl	48.85
Maternal age	< 35 years	22.87
	35–39 years	43.52
	≤ 40 years	33.60
Paternal age	≤ 40 years	46.92
	> 40 years	53.08
Family status	Two-parent family	94.47
	Single-parent family	5.53
Living with older persons	No	90.29
	Yes	9.71
Maternal education	Secondary (≤ 13 years)	45.19
	Undergraduate	39.45
	Postgraduate	15.36
Paternal education	Secondary (≤ 13 years)	51.20
	Undergraduate	32.27
	Postgraduate	16.53
Maternal occupational status	Unemployed	26.82
	Employed	73.18
Paternal employment status	Employee	64.50
	Self-employed	35.50
Order of child’s birth	1st	48.82
	2nd	41.57
	≥ 3	9.61
No of children in the family	1	15.43
	2	63.33
	≥3	21.24
Economic factors
Monthly family income	Low (≤ 15,999€)	21.26
	Medium (16,000–24,999€)	52.21
	High (≥ 25,000€)	26.53
Area-based annual income (measure of Socioeconomic level)	Low (4505–13,499€)	30.53
	Medium (13,500–23,399€)	35.69
	High (23,400–29,700€)	33.78
Consumer loans	No	73.51
	Yes	26.49
Difficulties in facing family needs with family income	Great difficulty	16.84
	Difficulty	35.52
	No difficulty	47.64
Economic difficulties during child’s birth	No	81.19
	Yes	18.81
Living conditions
Type of residence	Detached house	29.19
	Apartment	70.81
Size of residence	< 90 m2	29.45
	90–119 m2	33.26
	≥ 120 m2	37.29
Overcrowding*	> 1	54
House tenure	Private	81.49
	Rented	18.51
Private car	No	4.67
	Yes	95.33
Dish-washer	No	11.42
	Yes	88.58
Internet connection	No	15.11
	Yes	84.89
Oral health behaviours
Fluoride use at home†	Never	89.7
	Rare	9.1
	Daily	1.2
Topical fluoride applications	Never	63.15
	Once	21.69
	Regularly	15.16
Frequency of tooth brushing	Rare	20.65
	Once a day	50.48
	≥twice a day	28.87
Sugar consumption‡	Once a week	9.54
	2–3 times a week	43.70
	Daily	46.76
Consumption of commercial fruit juices	> 3 times a week	41
Oral health attitudes
Dental	No	16.47
Visits	Yes	83.56
Use of dental insurance	No	77.07
	Yes	22.93
Reason of first dental visit	Prevention	92.01
	Treatment	7.99
Frequency of mother’s dental visits	Rare	19.03
	Once a year	51.07
	> Once a year	29.90
Reason of mother’s dental visits	Check up	20.12
	Scaling	33.40
	Treatment	46.48

^*Number of persons/number of main rooms: value > 1 suggests overcrowding.

^†Except fluoride toothpaste.

^‡Solid sugary foods.