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Table 5 Association between maternal complications of pregnancy and subtypes of preterm birth among singleton births, Nova Scotia, Canada,1988 to 2003

From: Effects of socioeconomic position and clinical risk factors on spontaneous and iatrogenic preterm birth

Maternal complication

Spontaneous preterm birth

Iatrogenic preterm birth

Adjusted rate ratio*

95% CI

P value

Adjusted rate ratio*

95% CI

P value

Hypertension

3.92

3.47-4.440

<0.0001

14.1

11.4-17.4

<0.0001

Gestational diabetes

1.83

1.56-2.15

<0.0001

0.92

0.59-1.43

0.70

Diabetes

4.38

3.21-5.99

<0.0001

4.02

2.07-7.80

<0.0001

Chronic med. disease

1.34

1.16-1.55

<0.0001

1.58

1.16-2.15

0.003

Placenta previa

2.92

2.00-4.27

<0.0001

82.8

59.6-115.2

<0.0001

Placental abruption

9.15

7.78-10.8

<0.0001

12.6

9.14-17.5

<0.0001

  1. *Adjusted rate ratios were obtained from a logistic model that included family income, contribution to a registered savings plan, maternal age, parity, marital status, residence, pre-pregnancy weight, smoking status, previous cesarean delivery, previous low birthweight, previous perinatal death and calendar period. Chronic medical disease included cardiovascular disorders, renal disease, gastrointestinal disorders, respiratory disease, endocrine disorders, neurologic disease, blood dyscrasias and miscellaneous illnesses.
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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