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Table 1 Socio-economic, demographic and nutritional characteristics between fish oil (EPA and DHA) and control groups at the cohort baseline study (T0) (Intention-to-treat analysis)

From: Omega-3 supplementation from pregnancy to postpartum to prevent depressive symptoms: a randomized placebo-controlled trial

Variable

Fish oil Supplement (n = 32)

Control (n = 28)

p–value

Age (years) a

25.5 (22.0–34.5)

27.0 (21.0–31.0)

0.795

Gestational age (weeks) b

9.7 (2.3)

9.1 (2.5)

0.336

Education (years) a

11.0 (7.0–11)

8.0 (7.5–10.5)

0.070

Family income (US $) a

263.2 (181.9–383.0)

304.1 (180.7–379.8)

0.811

Skin color c

White

13.0 (40.6)

5.0 (17.9)

 

Non–white

19.0 (59.4)

23.0 (82.1)

0.055

Parity (number of parturition) c

0–1

26.0 (81.2)

18.0 (64.3)

 

≥ 2

6.0 (18.8)

10.0 (35.7)

0.138

Early pre-pregnancy BMI (kg/m2) a

23.9 (22.6–27.5)

23.1 (21.8–27.5)

0.213

Total dietary PUFAs (g/day) a

11.3 (8.0–14.9)

12.1 (9.4–17.0)

0.334

Edinburgh Postnatal Depression Scale (Score) a

10.0 (9.0–13.0)

10.5 (9.5–13.5)

0.621

History of depression c

No

16.0 (50.0)

11.0 (39.3)

 

Yes

16.0 (50.0)

17.0 (60.7)

0.405

  1. BMI Body mass index, PUFAs polyunsaturated fatty acids.
  2. aMedian (interquartile range); p-value refers to the Mann-Whitney U test.
  3. bMean (standard deviation); p-value refers to the Student t test.
  4. cAbsolute frequency (%); p-value refers to the qui-square test.