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Table 3 Crude and adjusted odds ratio (OR) and confidence interval (CI) for adverse birth outcomes related to dental treatment during pregnancy. (Reference category: Women who did not consult a dentist, OR = 1)

From: Polymer-based dental filling materials placed during pregnancy and risk to the foetus

 

Consulted a dentist, no white fillings placed OR (95% CI)

Consulted a dentist, white filling placed OR (95% CI)

Very preterm birth (≤ 32 weeks)

 Girls

Crude

0.96 (0.71–1.30)

0.91 (0.60–1.37)

Adjusted

0.94 (0.69–1.27)

0.88 (0.58–1.33)

 Boys

Crude

0.91 (0.69–1.21)

1.08 (0.76–1.53)

Adjusted

0.88 (0.67–1.17)

1.02 (0.72–1.45)

 All

Crude

0.92 (0.75–1.14)

1.01 (0.77–1.31)

Adjusted

0.90 (0.73–1.11)

0.97 (0.74–1.26)

Late preterm birth (33–36 weeks)

 Girls

Crude

1.00 (0.89–1.13)

1.05 (0.90–1.22)

Adjusted

1.00 (0.89–1.12)

1.03 (0.88–1.19)

 Boys

Crude

1.06 (0.95–1.18)

1.16*(1.01–1.34)

Adjusted

1.05 (0.94–1.18)

1.14 (0.99–1.31)

 All

Crude

1.03 (0.96–1.12)

1.10 (1.00–1.23)

Adjusted

1.03 (0.95–1.11)

1.08 (0.97–1.20)

Low birth weight (< 2500 g)

  Girls

Crude

1.01 (0.88–1.51)

1.03 (0.86–1.23)

Adjusted

0.98 (0.86–1.12)

0.99 (0.83–1.18)

 Boys

Crude

0.96 (0.84–1.11)

1.03 (0.86–1.24)

Adjusted

0.94 (0.82–1.09)

0.99 (0.83–1.19)

 All

Crude

0.99 (0.90–1.09)

1.03 (0.91–1.17)

Adjusted

0.96 (0.87–1.06)

0.99 (0.87–1.13)

Small for gestational age (SGA) 10 percentile

 Girls

Crude

1.07 (0.97–1.17)

1.14*(1.01–1.28)

Adjusted

1.03 (0.94–1.13)

1.10 (0.97–1.24)

 Boys

Crude

0.97 (0.89–1.05)

0.95 (0.85–1.07)

Adjusted

0.92 (0.84–1.00)

0.93 (0.83–1.04)

 All

Crude

1.01 (0.95–1.08)

1.04 (0.95–1.13)

Adjusted

0.97 (0.91–1.03)

1.00 (0.92–1.09)

Very small for gestational age (SGA) 2.5 percentile

 Girls

Crude

0.86 (0.71–1.06)

1.04 (0.81–1.34)

Adjusted

0.84 (0.68–1.03)

0.97 (0.75–1.25)

 Boys

Crude

0.98 (0.82–1.17)

0.88 (0.68–1.13)

Adjusted

0.93 (0.77–1.11)

0.84 (0.65–1.08)

 All

Crude

0.93 (0.81–1.06)

0.95 (0.80–1.14)

Adjusted

0.89 (0.77–1.02)

0.90 (0.75–1.08)

High birth weight (>  4000 g)

 Girls

Crude

0.99 (0.94–1.05)

0.98 (0.91–1.06)

Adjusted

1.03 (0.97–1.09)

0.98 (0.91–1.06)

 Boys

Crude

0.98 (0.93–1.03)

1.01 (0.94–1.07)

Adjusted

1.01 (0.96–1.06)

1.00 (0.93–1.07)

 All

Crude

0.98 (0.94–1.02)

0.99 (0.95–1.04)

Adjusted

1.01 (0.98–1.05)

0.99 (0.94–1.04)

Large for gestational age (LGA) 10 percentile

 Girls

Crude

0.96 (0.90–1.02)

0.99 (0.91–1.08)

Adjusted

1.00 (0.93–1.07)

0.98 (0.90–1.08)

 Boys

Crude

0.97 (0.90–1.04)

1.03 (0.94–1.13)

Adjusted

1.01 (0.94–1.08)

1.01 (0.93–1.11)

 All

Crude

0.96 (0.92–1.01)

1.01 (0.95–1.08)

Adjusted

1.01 (0.96–1.06)

1.00 (0.94–1.06)

Large for gestational age (LGA) 2.5 percentile

 Girls

Crude

0.97 (0.87–1.09)

1.01 (0.87–1.17)

Adjusted

1.02 (0.91–1.15)

0.99 (0.86–1.15)

 Boys

Crude

0.95 (0.84–1.07)

1.06 (0.90–1.24)

Adjusted

0.98 (0.87–1.11)

1.03 (0.88–1.20)

 All

Crude

0.96 (0.88–1.04)

1.03 (0.93–1.15)

Adjusted

1.00 (0.92–1.09)

1.01 (0.91–1.12)

Malformation

 Girls

Crude

1.02 (0.92–1.14)

0.99 (0.86–1.15)

Adjusted

1.00 (0.90–1.12)

1.00 (0.86–1.15)

 Boys

Crude

1.05 (0.95–1.15)

1.01 (0.89–1.15)

Adjusted

1.03 (0.94–1.14)

1.00 (0.88–1.14)

 All

Crude

1.03 (0.96–1.11)

1.00 (0.91–1.10)

Adjusted

1.02 (0.95–1.09)

1.00 (0.91–1.10)

Stillbirth

 Girls

Crude

0.96 (0.59–1.55)

1.20 (0.67–2.15)

Adjusted

0.92 (0.57–1.50)

1.16 (0.64-2.07)

 Boys

Crude

0.97 (0.61–1.54)

1.30 (0.75–2.24)

Adjusted

0.95 (0.60–1.51)

1.22 (0.70–2.11)

 All

Crude

0.98 (0.71–1.37)

1.25 (0.84–1.86)

Adjusted

0.96 (0.69–1.33)

1.18 (0.79–1.76)

  1. The OR was adjusted for mothers age (≤19, 20–24, 25–29, 30–34, 35–39, 40+), parity (0, 1 or more previous viable pregnancies), education (≤ 12 years, 13–16 years, ≥ 17 years), pre-pregnancy body mass index (< 18.5, 18.5–24.9, 25.0–29.9, 30.0–34.9, 35.0–39.9, ≥ 40), smoking (never, occasionally, daily) and alcohol consumption during pregnancy (never, less than once a week, once a week, more than once a week). *p < 0.05