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Table 1 Demographic characteristics of women with singleton births in the period 1992-2010

From: Deliveries among teenage women – with emphasis on incidence and mode of delivery: a Swedish national survey from 1973 to 2010

Age groups

Characteristic

< 16 years

16-17 years

18-19 years

20-30 years

(n=472)

(n=5376)

(n=23560)

(n=893505)

BMI (kg/m2)

22.8

(3.4)

22.8

(3.8)

23.3

(4.2)

24.1

(4.3)

Smoking

105

(22.7%)

1830

(34.7%)

7239

(31.3%)

114278

(12.8%))

Parity:

1

469

(99.4%)

5208

(96.9%)

21287

(90.4%)

471470

(52.8%)

 

2

3

(0.6%)

163

(3.0%)

2131

(9.0%)

318522

(35.6%)

 

3+

0

(0%)

5

(0.1%)

142

(0.6%)

103513

(11.6%)

  1. Figures denote means and one SD or numbers and proportions.
  2. BMI = body mass index.
  3. Reported length, weight and smoking habits at first antenatal visit.