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Table 1 Univariate analyses on predictive factors of gestational duration in twins after assisted reproduction (n = 113)

From: The impact of fetal gender on prematurity in dichorionic twin gestations after in vitro fertilization

 

Regression

95% Confidence Interval

p-value

 

Coefficient

Lower and Upper Limit

 

Female age (years)

0,20

0,04

0,29

0,01

Body mass index (kg/m 2 )

0,0

-0,01

0,01

n.s.**

Smoking status

0,1

-1,31

4,59

n.s.

Previous IVF pregnancy

0,1

-0,91

2,08

n.s.

Indication for assisted reproduction

-0,1

-0,86

0,74

n.s.

Stimulation protocol

0,2

-0,96

2,89

n.s.

Mode of delivery

0,10

-0,69

3,30

n.s.

Fetal gender*

-0,20

-2,49

-0,26

0,02

  1. *opposite sex versus same sex twins
  2. **not significant