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Table 2 Obstetric history, ANC and family planning for the different adolescent subgroups in comparison to the older women group

From: Adolescent pregnancy in Sao Tome and Principe: a cross-sectional hospital-based study

Characteristics

Pregnancies ≤19 years old

Pregnancies >20 years old

very early childbearing

(≤15)

n= 8 (%)

early childbearing

(≥16 and ≤17)

n=45 (%)

late childbearing

(≥18 and ≤19)

n=51 (%)

Total adolescents

n= 104 (%)

n=414 (%)

Previous contraceptive use

 yes

0 (0%)

2 (4%)

5 (9.8%)

7 (6.7%)

119 (28.7%)

 no

7 (87.5%)

36 (80%)

41 (80.3%)

84 (80.7%)

217 (52.4%)

 missings#

1 (12.5%)

7 (16%)

5 (9.8%)

13 (12.6%)

78 (18.8%)

 OR and 95% CI

-

0.14 (0.03-0.59)

0.24 (0.08-0.6)

0.33 (0.2-0.5)

 

p value

-

0.007

0.007

≤0.001*

 

Pregnancy was planned

 yes

0 (0%)

5 (11%)

14 (27.4%)

19 (18.3%)

102 (24.6%)

 no

5 (62.5%)

30 (67%)

25 (49%)

60 (57.7%)

231 (55.8%)

 missings#

3 (37.5%)

10 (22%)

12 (23.5%)

25 (24%)

81 (19.6%)

 OR and 95% CI

-

0.39 (0.1-1.0)

1.2 (0.6-2.5)

-

 

p value

-

0.06

0.49

-

 

Gravidity

 1

7 (87.5%)

39 (87%)

27 (52.9%)

73 (70.2%)

54 (13%)

 2

1 (12.5%)

5 (11%)

19 (37.3%)

25 (24%)

78 (18.8%)

 3 or more

0 (0%)

1 (2%)

5 (9.8%)

6 (5.8%)

282 (68.1%)

 OR and 95% CI

   

17.7 (9-26)

 

 p value

   

≤0.001**

 

Abortion/ miscarriage

 0

7 (87.5%)

41 (91%)

41 (82%)

89 (85.5%)

274 (66.2%)

 1

1 (12.5%)

4 (9%)

9 (18%)

14 (13.5%)

105 (25.4%)

 2

0 (0%)

0 (0%)

0 (0%)

0

22 (5.3%)

 >3

0 (0%)

0 (0%)

0 (0%)

0

13 (3.1%)

 OR and 95% CI

   

-

 

 p value

   

-

 

Living children

 0

8 (100%)

43 (96%)

35 (68.6%)

86 (82.7%)

74 (17.9%)

 1

0 (0%)

2 (4%)

13 (25.5%)

15 (14.4%)

89 (21.5%)

 2

0 (0%)

0 (0%)

3 (5.9%)

3 (2.9%)

97 (23.4%)

 >3

0 (0%)

0 (0%)

0 (0%)

0

154 (37.2%)

 OR and 95% CI

   

-

 

p value

   

-

 

1st attendance ANC

 <12th

3 (37.5%)

18 (40%)

34 (66.6%)

55 (52.9%)

218 (52.7%)

 >12th

3 (37.5%)

22 (49%)

12

37 (35.6%)

136 (32.8%)

 missings

2 (25%)

5 (11%)

5 (9.8%)

12 (11.5%)

60 (14.5%)

 OR and 95% CI

0.8 (0.17-4.3)

0.7 (0.3-1.4)

2.47 (1.2-4.9)

-

 

p value

0.87

0.39

0.01

-

 

ANC

 at least once

   

104 (100%)

413 (99.7%)

 <4 visits

2 (25%)

8 (18%)

5 (9.8%)

15 (14.4%)

55 (13.3%)

 4-7 visits

4 (50%)

21 (47%)

20 (39.2%)

45 (43.3%)

196 (47.3%)

 >8 visits

2 (25%)

16 (36%)

26 (51%)

44 (42.3%)

163 (39.4%)

 OR and 95% CI

   

-

 

p value

   

-

 

Want to do family planning

 yes

1 (12.5%)

34 (76%)

16 (31.3%)

51 (49%)

165 (39.9%)

 no

0 (0%)

1 (2%)

3 (5.9%)

4 (3.8%)

39 (9.4%)

 missings#

7 (87.5%)

10 (22%)

32 (62.8%)

49 (47.1%)

194 (46.9%)

 OR and 95% CI

   

0.66 (0.4-1.03)

 

p value

   

0.07

 
  1. # as don’t know, doesn’t want to reply
  2. Abbreviations: ANC Antenatal care, OR Odds Ratio, CI Confidence interval.
  3. * Previous contraceptive use was stated in 6.7% of the teenage group and in 28.7% of the older counterpart, what is a significant statistically difference (OR =0.33, 95% CI = 0.2–0.5, p ≤0.001).
  4. ** The proportion of primigravidas among teenagers in relation to those aged >20 years was statistically significant (OR 15.7, 95% CI= 9-26, p≤0.001).