Skip to main content

Table 4 Associations between total seafood intake, lean and fatty fish intake and marine long chain n-3 polyunsaturated fatty acids (LCn-3PUFA) from supplements and preterm delivery (PTD). N = 67,007 women in the Norwegian Mother and Child Cohort Study (MoBa) 2002–2008

From: Maternal intake of seafood and supplementary long chain n-3 poly-unsaturated fatty acids and preterm delivery

 

All

PTD

Unadjusted

Adjusted

n

n (%)

HRa (95% CI)

HRab (95% CI)

Total seafood

  ≤ 5 g/d (never/rarely)

2966

220 (7.4)

1

1

  > 5–20 g/d (<1 serving/week)

12,299

713 (5.8)

0.77 (0.66, 0.90)

0.80 (0.69, 0.93)

  > 20–40 g/d (1–2 servings/week)

27,045

1440 (5.3)

0.71 (0.62, 0.82)

0.76 (0.66, 0.88)

  > 40–60 g/d (2–3 servings/week)

16,432

824 (5.0)

0.67 (0.57, 0.77)

0.72 (0.62, 0.83)

  > 60 g/d (≥3 servings/week)

8265

433 (5.2)

0.70 (0.59, 0.82)

0.72 (0.61, 0.85)

  P for trendc

  

<0.001

<0.001

Lean fish

  ≤ 5 g/d (never/rarely)

7453

492 (6.6)

1

1

  > 5–20 g/d (<1 serving/week)

29,159

1578 (5.4)

0.82 (0.74, 0.90)

0.88 (0.79, 0.98)

  > 20–40 g/d (1–2 servings/week)

24,834

1277 (5.1)

0.77 (0.70, 0.86)

0.86 (0.77, 0.95)

  > 40–60 g/d (2–3 servings/week)

4799

236 (4.9)

0.74 (0.63, 0.86)

0.78 (0.67, 0.92)

  > 60 g/d (≥3 servings/week)

762

47 (6.2)

0.93 (0.69, 1.26)

0.91 (0.67, 1.23)

  P for trendc

  

<0.001

0.005

Fatty fish

  ≤ 5 g/d (never/rarely)

22,035

1305 (5.9)

1

1

  > 5–20 g/d (<1 serving/week)

33,297

1693 (5.1)

0.85 (0.80, 0.92)

0.91 (0.85, 0.98)

  > 20–40 g/d (1–2 servings/week)

8654

448 (5.2)

0.87 (0.78, 0.97)

0.91 (0.81, 1.02)

  > 40–60 g/d (2–3 servings/week)

1898

116 (6.1)

1.03 (0.85, 1.25)

1.06 (0.87, 1.28)

  > 60 g/d (≥3 servings/week)

1123

68 (6.1)

1.03 (0.80, 1.31)

1.02 (0.80, 1.31)

  P for trendc

  

0.088

0.411

LCn-3PUFA from supplements

 No supplement

22,018

1093 (5.4)

1

1

  < 0.30 g/d (median 0.16 g/d)

22,493

1207 (5.4)

0.99 (0.92, 1.07)

1.00 (0.92, 1.09)

  ≥ 0.30 g/d (median 0.80 g/d)

22,496

1230 (5.5)

1.01 (0.93, 1.09)

1.02 (0.94, 1.11)

  P for trendc

  

0.818

0.567

  1. aHR: Hazard Ratio (Cox regression)
  2. bAdjusted for the other seafood categories and LCn-3PUFA from supplements, maternal age, pre-pregnancy BMI, height, parity, energy intake, maternal education, smoking, marital status, household income and previous preterm delivery
  3. cP for linear trend obtained by incorporating variable as linear term