Table 2

Change from baseline to follow-up in intake and biomarker levels of fish, docosahexaenoic acid (DHA), and mercury, and hair mercury collected at follow-up, by study arm, among 55 pregnant women enrolled in the Food for Thought study
Change from baseline to follow-up Control N=20 Advice N=18 Advice + Gift Card N=17 Advice vs. Control Advice + Gift Card vs. Control
Mean (SD) or % P value*
Supplements
DHA from supplements (mg/day) 10 (80) 10 (52) 34 (76) 0.99 0.31
Diet
Fish intake (g/day) 2 (17) 14 (22) 24 (36) 0.15 0.01
DHA from fish (mg/day) −12 (75) 57 (114) 149 (118) 0.04 <0.0001
DHA from fish + supplements (mg/day) 2 (11) 67 (130) 183 (144) 0.10 <0.0001
Mercury intake from fish (mcg/day) 0.4 (1.8) −0.1 (2.1) 0.9 (1.8) 0.37 0.50
Mercury intake from fish (mcg/kg/day) 0.007 (0.03) −0.003 (0.02) 0.012 (0.03) 0.27 0.55
Biomarkers
Plasma DHA (% of total fatty acids) 0.01 (0.45) −0.12 (0.66) −0.07 (0.29) 0.03 0.52
Whole blood mercury (mcg/L) 0.35 (1.12) −0.26 (0.36) −0.40 (1.27) 0.67 0.22
Follow-up
Hair mercury (mcg/g) 0.31 (0.31) 0.25 (0.23) 0.31 (0.30) 0.50 0.99

* P value from 1-way ANOVA.

Oken et al.

Oken et al. Nutrition Journal 2013 12:33   doi:10.1186/1475-2891-12-33

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