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Table 4 The posterior inclusion probabilities (PIP) for each metal

From: Associations between maternal blood metal concentrations during the first trimester and spontaneous preterm birth: a nested case-control study

Metals

Variable-specific PIPsa

Groupb

Grouped PIPsc

Conditional PIPsd

V

1.00

1

1.00

1.00

Ca

0.99

1

1.00

0

Cd

0.35

–

–

–

Li

0.38

–

–

–

Mg

0.86

2

0.83

0.36

Mn

0.98

3

0.88

1.00

Mo

0.21

–

–

–

Pb

0.88

4

0.85

1.00

As

0.46

–

–

–

Sr

0.95

5

1.00

1.00

Fe

0.51

2

0.83

0.16

Cu

0.85

6

0.64

1.00

Se

0.26

–

–

–

Zn

0.67

2

0.83

0.48

  1. aEstimated by BKMR model without hierarchical variable selection
  2. bThe pre-defined metal group categorized by correlation coefficients
  3. cIndicated group importance for each metal group
  4. dThe importance of each metal given the group it belongs was important