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Table 3 Factors associated with the time to first abortion after sexual debut

From: Prognostic factors of time to first abortion after sexual debut among fragile state Congolese women: a survival analysis

Variable

Unadjusted Hazard Ratio

95% CI

Adjusted Hazard Ratio

95% CI

Age (years)

 15–19

Reference

 

Reference

 

 20–24

0.55

0.44–0.69*

0.53

0.42–0.68*

 25–29

0.34

0.27–0.43*

0.34

0.26–0.43*

 30–34

0.20

0.16–0.25*

0.21

0.16–0.27*

 35–39

0.14

0.11–0.18*

0.15

0.12–0.20*

 40–44

0.09

0.07–0.12*

0.10

0.08–0.14*

 45–49

0.09

0.07–0.12*

0.10

0.08–0.14*

Region

 Kouilou

Reference

 

Reference

 

 Niari

1.37

1.13–1.66*

0.66

0.51–0.85*

 Lekoumou

0.63

0.51–0.77*

0.50

0.41–0.63*

 Bouenza

0.93

0.77–1.11

0.75

0.61–0.92*

 Pool

0.32

0.25–0.42*

0.33

0.25–0.44*

 Plateaux

0.51

0.40–0.65*

0.45

0.34–0.58*

 Cuvette

0.81

0.66–0.98*

0.56

0.45–0.69*

 Cuvette-Ouest

0.43

0.33–0.56*

0.34

0.26–0.44*

 Sangha

0.87

0.72–1.07

0.46

0.36–0.58*

 Likouala

0.45

0.35–0.58

0.35

0.27–0.45*

 Brazzaville

1.15

0.97–1.37

0.55

0.42–0.73*

 Pointe-Noire

1.38

1.18–1.61*

0.63

0.49–0.82*

Residential status

 Urban

Reference

 

Reference

 

 Rural

0.50

0.46–0.54*

0.99

0.81–1.23

Wealth quintiles

 Poorest

Reference

 

Reference

 

 Poorer

1.67

1.48–1.90*

1.34

1.17–1.53*

 Middle

2.56

2.21–2.96*

1.67

1.40–2.01*

 Richer

2.80

2.43–3.22*

1.86

1.53–2.25*

 Richest

2.95

2.55–3.43*

1.94

1.57–2.39*

Health insurance coverage

 Insured

1.20

0.90–1.58

  

 Uninsured

Reference

   

Marital status

 Never in union

Reference

 

Reference

 

 Currently in union/living with a man

0.33

0.28–0.38*

0.59

0.47–0.75*

 Formerly in union/lived with a man

0.42

0.35–0.50*

0.71

0.55–0.91*

Exposure to media

 Yes

1.72

1.56–1.91*

1.12

0.99–1.26

 No

Reference

 

Reference

 

Education

 No formal education

Reference

 

Reference

 

 Primary

1.70

1.34–2.17*

1.42

1.11–1.81*

 Secondary+

2.59

2.05–3.26*

1.76

1.37–2.25*

Religion

 Protestant/Catholic

Reference

   

 Islam

0.60

0.28–1.25

  

 Spiritual

0.97

0.89–1.06

  

Ever used anything or tried to delay or avoid getting pregnant

 Yes

1.44

1.29–1.61*

1.37

1.21–1.54*

 No

Reference

 

Reference

 

Parity

 Nil

Reference

 

Reference

 

 1–3

0.71

0.60–0.85*

0.94

0.71–1.24

 4+

0.38

0.31–0.45*

0.92

0.67–1.26

Age at first birth

 No birth

Reference

 

Reference

 

 < 20

0.56

0.47–0.66*

1.32

1.05–1.65*

 20–24

0.47

0.39–0.57*

1.13

0.90–1.42

 25+

0.35

0.27–0.45*

1.00

–

Age at first marriage

 Not married

Reference

 

Reference

 

 < 20

0.36

0.31–0.42*

0.94

0.79–1.13

 20–24

0.36

0.30–0.42*

1.04

0.87–1.26

 25+

0.28

0.23–0.34*

1.00

–

Age at first sexual intercourse

 < 18

Reference

   

 18+

0.90

0.70–1.04

  

Total lifetime number of sex partners

 1–2

Reference

 

Reference

 

 3–4

1.43

1.24–1.63*

1.28

1.11–1.47*

 5+

1.63

1.42–1.86*

1.49

1.30–1.72*

  1. *Significant at p < 0.05
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