Table 3 Unadjusted analysis of variables associated with the total score and each domain of B-ECOHIS (severity)

Demographic characteristics

Age

 2 years

Ref

 3 years

1.29 (0.79–2.11)

1.23 (0.73–2.08)

1.21 (0.80–1.83)

 4 years

0.92 (0.54–1.56)

1.42 (0.82–2.46)

1.02 (0.66–1.57)

Sex

 Male

Ref

 Female

1.38 (0.92–2.06)

1.35 (0.91–2.01)

1.21 (0.86–1.68)

Number of siblings

 None

 1 or more

1.77 (1.19–2.65)

1.55 (1.03–2.33)

1.65 (1.19–2.29)

Socioeconomic characteristics

Household crowding

  ≤ 1

Ref

  > 1

1.27 (0.74–1.72)

0.86 (0.55–1.34)

0.99 (0.69–1.42)

Family income

 Up to 2 minimum wage

Ref

  ≥ 2 minimum wage

0.77 (0.51–1.14)

1.12 (0.74–1.68)

0.97 (0.69–1.36)

Mother’s age

  ≤ 30 years

Ref

  > 30 years

1.33 (0.88–2.00)

0.95 (0.63–1.43)

1.12 (0.80–1.56)

Mother’s level of education

  ≤ 10 years

  > 10 years

0.98 (0.64–1.52)

1.23 (0.74–2.01)

1.08 (0.75–1.55)

Father’s age

  ≤ 30 years

Ref

  > 30 years

1.08 (0.69–1.68)

1.22 (0.73–2.04)

1.16 (0.79–1.68)

School frequency

 Yes

 No

1.21 (0.76–1.94)

0.86 (0.49–1.51)

1.11 (0.74–1.67)

Oral health characteristics

Frequency of consumption of sugar

  < 3 times a day

Ref

  > 3 times a day

1.04 (0.68–1.60)

1.32 (0.86–2.04)

1.13 (0.79–1.59)

Tooth brushing

  ≥ 2 times a day

Ref

  < 2 times a day

0.96 (0.57–1.59)

1.21 (0.77–1.91)

1.19 (0.78–1.81)

Socioeconomic stratum

 A + B1

Ref

 B2 + C1 + C2 + D-E

1.11 (0.68–1.78)

0.96 (0.63–1.48)

1.24 (0.85–1.81)

Breald

 Low

Ref

 Ideal

0.84 (0.47–1.49)

1.31 (0.59–2.91)

0.98 (0.60–1.62)

Untreated caries experience

 Absence

Ref

 Presence

1.63 (1.08–2.47)

0.99 (0.66–1.50)

1.66 (1.19–2.29)