Table 2

Contingency table for the adolescent girl group versus young adult group according to the history of pregnancy and clinical examination n(%).

Adolescent n ​= ​1040

Youg-Adult n ​= ​736

OR (95% CI)

p value

History of pregnancy

Age of first prenatal consultation

Trimester 1

130 (12.5)

312 (42.39)

Trimester 2

838 (80.57)

380 (51.63)

5.29 (4.17–6.71)

<0.001

Trimester 3

69 (6.63)

23 (3.12)

7.20 (4.30–12.04)

<0.001

Postterm pregnancy

3 (0.28)

21 (2.85)

0.34 (0.10–1.17)

0.087

Number of prenatal consultation ≥4

482 (46.34)

516 (70.10)

0.37 (0.30–0.45)

<0.001

Prenatal check-up

545 (52.40)

554 (75.27)

0.36 (0.29–0.45)

<0.001

Clinical Examination on admission

Fever

26 (2.5)

9 (1.22)

2.07 (0.93–5.05)

0.056

Normal blood pressure

846 (81.34)

602 (81.79)

0.97 (0.75–1.25)

0.811

Excessive fundal height

173 (16.63)

200 (27.17)

0.53 (0.42–0.78)

<0.001

Fetal Heart Sound

898 (86.34)

655 (88.99)

0.78 (0.58–1.05)

0.097

Fetal Presentations

Head position

970 (93.26)

66 (8.96)

1.59 (1.12–2.27)

0.006

Breech position

58 (5.57)

63 (8.55)

0.63 (0.43–0.93)

0.014

Transversal

12 (1.15)

13 (1.76)

0.65 (0.27–1.55)

0.280

Pelvic measurements

Normal(i)

917 (88.17)

726 (98.64)

Limit(ii)

90 (8.65)

7 (0.95)

10.18 (4.69–22.10)

<0.001

Narrowed(iii)

33 (3.17)

3 (0.40)

8.71 (2.66–28.51)

<0.001

Genital mutilation

74 (7.11)

29 (3.94)

1.87 (1.18–3.01)

0.005

  • (i) manual Magnin Index (MI) ≥23 ​cm; (ii) MI<21–23 ​cm; (iii) MI<21 ​cm.

    Note: MI ​= ​obstetric conjugate diameter (OCD) ​+ ​median transverse diameter (MTD).