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Table 3 Multivariate logistic regression with key exposure birth order and caries increment from age 3- to 7 years

From: Birth order is associated with caries development in young children: a register-based cohort study

Birth order

Caries increment (Δ deft > 0)

Crude Model

Model I

Model II

Model III

Model IV

OR (CI 95%)

OR (CI 95%)

OR (CI 95%)

OR (CI 95%)

OR (CI 95%)

First-born

1.00

1.00

1.00

1.00

1.00

Second-born

1.21 (1.16–1.26)

1.21 (1.16–1.26)

1.20 (1.15–1.26)

1.18 (1.12–1.23)

1.17 (1.12–1.23)

Third-born

1.76 (1.67–1.86)

1.76 (1.66–1.86)

1.71 (1.61–1.81)

1.50 (1.42–1.60)

1.47 (1.38–1.56)

Fourth-born

2.70 (2.46–2.96)

2.69 (2.45–2.95)

2.43 (2.20–2.68)

1.84 (1.67–2.04)

1.69 (1.52–1.88)

Fifth- or later-born

3.92 (3.44–4.47)

3.90 (3.41–4.45)

3.55 (3.08–4.08)

1.93 (1.68–2.23)

1.84 (1.58–2.14)

  1. Crude model = Unadjusted.
  2. Model I = Adjusted only for gender and maternal age.
  3. Model II = Adjusted only for maternal smoking and BMI.
  4. Model III = Adjusted only for sociodemographic factors (parent’s country of birth, maternal educational level, family situation and family income).
  5. Model IV = Adjusted for gender, maternal age, maternal smoking, maternal BMI, and sociodemographic factors.
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