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Table 4 Adjusted risk ratio (RRadj and 95%CI) for maternal and perinatal outcomes from low birth weight by multiple logistic regression analysis*

From: Perinatal outcomes associated with low birth weight in a historical cohort

Outcomes

RRadj (95%CI)

Amniotic fluid (AF)

  

   clear

1.00

 

   non-clear

0.79

(0.71-0.88)

AF amount

  

   normal

1.00

 

   abnormal

3.21

(2,77-3.71)

Fetal heart rate

  

   normal

1.00

 

   abnormal

1.97

(1.75-2.22)

Onset of labor

  

   spontaneous

1.00

 

   elective cesarean

2.27

(2.03-2.53)

   induction

1.62

(1.43-1.84)

Mode of delivery

  

   spontaneous

1.00

 

   breech

4.69

(3.18-6.91)

   forceps

0.62

(0.54-0.72)

   cesarean

1.38

(1.29-1.48)

1 st minute Apgar score

  

   7 to 10

1.00

 

   < 7

2.73

(2.46-3.04)

5 th minute Apgar score

  

   7 to 10

1.00

 

   < 7

6.69

(5.32-8.42)

Somatic gestational age

  

   ≥ 37 weeks

1.00

 

   < 37 weeks

20.80

(18.39-23.51)

Sex

  

   male

1.00

 

   female

1.08

(1.02-1.16)

Malformation

  

   without

1.00

 

   with

2.86

(2.24-3.64)

  1. * Results controlled by confounding factors: maternal age, schooling, body mass index, smoking and time of initiation of prenatal care