Skip to main content

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