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Table 3 Estimates of outcome measures among women aged 18 to 19 years compared with women aged 20 to 29 years

From: Preterm birth and reduced birthweight in first and second teenage pregnancies: a register-based cohort study

 

First Births (n = 28026)

Second births (n = 24691)

Outcomes

Number of babies

Crude estimatea (95% CI)

Adjusted estimatea (95% CI)

Number of babies

Crude estimatea (95% CI)

Adjusted estimatea (95% CI)

Birthweight in grams

5316

-40(-57, -23)

-29(-42, -16)b

2910

-78(-103, -53)

-55(-74, -37)b

Birthweight in term babies

4969

-33(-49, -16)

-30(-43, -16)b

2044

-71(-95, -48)

-57(-77, -38)b

SGA

325

1.13(0.99-1.28)

1.13(0.99-1.28)c

165

1.35(1.13-1.60)

1.25(1.05-1.48)c

VSGA

212

1.09(0.94-1.28)

1.09(0.93-1.27)c

107

1.27(1.03-1.06)

1.17(0.94-1.45)c

Preterm birth 33-36 weeks

240

1.07(0.92-1.25)

1.10(0.95-1.28)c

106

1.43(1.16-1.76)

1.27(1.03-1.59)c

Very preterm birth 23-32 weeks

94

1.45(1.14-1.84)

1.42(1.12-1.81)c

38

1.22(0.84-1.76)

1.21(0.86-1.71)c

  1. a The estimate of the effect of young maternal age on birthweight is birthweight mean difference in grams; the estimates of SGA, VSGA, preterm birth and very preterm birth are odds ratios.
  2. b adjusted for BMI, social deprivation score, infants sex, ethnicity and gestational age.
  3. c adjusted for BMI, social deprivation score, infants sex and ethnicity