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Table 5 Multiple stepwise regression analyses for determinants of PUFA levels in maternal blood erythrocytes

From: Determinants of polyunsaturated fatty acid concentrations in erythrocytes of pregnant Japanese women from a birth cohort study: study protocol and baseline findings of an adjunct study of the Japan environment & Children’s study

 

DHA (n = 1376)

log-EPA (n = 1374)

ARA (n = 1504)

Adjusted model R2

0.072

0.122

0.056

Variables

B

Standardized β

p

B

Standardized β

p

B

Standardized β

p

Maternal age at blood collection

0.025

0.12

<.0001

0.0034

0.090

0.0007

−0.020

−0.089

0.0005

Maternal education (<13 yrs)

0.056

0.049

0.078

0.019

0.10

0.0005

-

  

Household income

  < 2 (million Japanese Yen)

reference

 

reference

 

-

  

 2 to <4

−0.084

−0.046

0.098

−0.021

−0.066

0.014

-

  

 4 to <6

−0.092

−0.046

0.11

−0.013

−0.034

0.19

-

  

 6 to <8

0.11

0.042

0.16

0.0079

0.018

0.54

-

  

  ≥ 8

0.073

0.027

0.38

0.041

0.086

0.0034

-

  

Smoking habits

 Never smoked

reference

 

reference

 

-

  

 Ex-smokers before pregnancy

−0.084

0.088

0.10

0.014

0.059

0.13

-

  

 Ex-smokers after pregnancy

−0.070

−0.048

0.23

−0.010

−0.038

0.34

-

  

 Smokers

−0.17

−0.10

0.032

−0.015

−0.049

0.27

-

  

Body weight gain

-

  

0.0057

0.091

0.0004

−0.027

−0.072

0.0044

Fish intake

0.43

0.16

<.0001

0.094

0.20

<.0001

−0.57

−0.21

<.0001

Meat intake

-

  

-

  

0.58

0.17

<.0001

Sex (male)

0.055

0.049

0.061

0.0091

0.046

0.068

-

  

Season at blood collection

 Spring

reference

 

reference

 

-

  

 Summer

−0.067

−0.043

0.17

−0.021

−0.076

0.012

-

  

 Autumn

0.051

0.031

0.32

0.032

0.11

0.0003

-

  

 Winter

0.087

0.052

0.097

0.028

0.097

0.0017

-

  
  1. Variables included in the model are indicated