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Table 2 Logistic regression on factors related to low birth weight and macrosomia a

From: Secular trends of low birthweight and macrosomia and related maternal factors in Beijing, China: a longitudinal trend analysis

Factorsb

 

OR[95 % CI]

Low birth weight

  

Gestational weight gain

Inadequate

2.38[1.39-4.08]

 

Adequate

1

Gestation

<37 weeks

80.88[54.23-120.61]

 

37 weeks or more

1

PIH

Yes

2.40[1.25-4.61]

 

No

1

Amniotic fluid volume

Oligohydramnios

3.14[1.57-6.29]

 

Normal

1

Baby gender

Male

1.66[1.12-2.46]

 

Female

1

Macrosomia

  

Gestational weight gain

Excessive

2.46[1.85-3.27]

 

Adequate

1

Gestation

40 weeks or more

2.94[2.36-3.66]

 

37-40 weeks

1

Gestational diabetes

Yes

1.89[1.16-3.09]

 

No

1

Amniotic fluid volume

Polyhydramnios

3.00[1.50-6.04]

 

Normal

1

Baby gender

Male

1.77[1.42-2.22]

 

Female

1

Prepregnancy BMI

Underweight

0.46[0.31-0.69]

 

Normal

1

 

Overweight/obesity

1.99[1.53-2.59]

  1. OR, odds ratio, CI, confidence interval, BMI, body mass index, PIH, pregnancy-induced hypertension.
  2. aData source: Beijing Obstetrics and Gynecology Hospital, 2010.
  3. bFactors were selected using stepwise regression forward selection at a significance level of 0.05.
  4. Pregnancy-induced hypertension and gestational diabetes diagnosis were defined in Table 1.
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