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Table 2 Factor loadingsa and explained variation of dietary patterns identified using RRR, PLS and PCA from pre- to early pregnancy

From: Dietary patterns before and during pregnancy and small for gestational age in Japan: a prospective birth cohort study

 

RRR

PLS

PCA

PCA1

PCA2

Factor loadings of food groups

 Cereals

0.38

0.41

−0.14

−0.36

 Pulses

0.02

0.01

0.33

0.19

 Nuts and seeds

0.14

0.13

0.15

−0.08

 Vegetables

−0.04

0.04

0.48

0.22

 Fruits

0.57

0.51

0.32

0.11

 Mushroom

0.02

0.07

0.50

0.05

 Fish and shellfish

0.02

0.05

0.34

−0.08

 Meat

0.10

0.04

−0.002

− 0.36

 Eggs

0.11

0.08

−0.11

0.40

 Milk and dairy products

−0.06

−0.07

− 0.26

0.64

 Confectioneries

−0.14

−0.10

0.12

−0.19

 Alcohol beverage

−0.46

−0.58

− 0.19

−0.04

 Non-Alcohol beverage

−0.50

−0.44

0.15

−0.11

Explained variation (%) in food groups

7.7

8.5

12.7

10.9

Explained variation (%) in birth weight SD score

0.31

0.29

0.0044

0.0001

  1. RRR reduced-rank regression, PLS partial least-squares regression, PCA principal component analysis, SD standard deviation
  2. aFactor loadings ≧ |0.20| are shown in bold