Table 3 Univariate analysis by simple linear regression for log(10) IgG at birth

Maternal age (years)

0.11

-0.04, 0,06

0.688

Ethnicity

 Caucasian

 Latino American

 Arabic

—

0.17

0.13

—

-1.44, 1,78

-0.49, 0.76

0.837

0.668

GA at diagnosis (weeks)

0.00

-0.00, 0.00

0.482

Any comorbidity

0.33

-0.50, 1.16

0.427

Symptomatology

0.03

-0.57, 0.64

0.911

Specific treatment

0.81

-0.29, 1.92

0.147

Hospital admission

0.84

-0.16, 1.83

0.097

Infection classification at delivery

 Acute infection

 Recent infection

 Past infection

—

2.51

2.70

—

1.73, 3.28

2.00, 3.40

< 0.001

< 0.001

Maternal IgG titers at delivery (AU/mL)

2.71

2.18, 3.24

< 0.001

GA at delivery (weeks)

0.06

-0.19, 0.30

0.645

Sex (male)

-0.31

-0.91, 0.30

0.312

Type of delivery

 Eutocic

 Instrumental

 Cesarean section

—

-0.90

-0.22

—

-0.99, 0.81

-1.26, 0.82

0.840

0.671

Breastfeeding method

 Maternal

 Artificial

 Mixed

—

-0.74

0.32

—

-2.03, 0.55

-0.33, 0.96

0.255

0.328