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Table 2 Significant associations of all cases and controls for unsafe abortion

From: Risk of unsafe abortion associated with long-term contraception behaviour: a case control study from Sri Lanka

Risk factor

Cases

N = 171

Controls

N = 600

Crude OR

(95% CI)

Adjusted OR

(95% CI)

Model 1a,b

Adjusted OR

(95% CI)

Model 2a,c

No.

%

No.

%

Contraceptive practice

  At conception:

  Non-use

103

60.2%

238

39.7%

2.3 (1.6–3.3)

2.0 (1.2–3.2)

 

  Ineffective use (Reference)

68

39.8%

362

60.3%

1.00

1.00

-

  According to long-term behaviour:

  Never use

11

6.4%

51

8.5%

1.1 (0.6–2.3)

 

1.4 (0.7–3.1)

  Early discontinuation

45

26.3%

80

13.3%

3.0 (1.9–4.7)

 

1.7 (1.1–3.1)

  Late discontinuation

47

27.5%

107

17.8%

2.3 (1.5–3.6)

 

2.3 (1.5–3.6)

  Ineffective use (Reference)

68

39.8%

362

60.3%

1.00

-

1.00

Secondary education

 Not completed

115

67.6%

332

55.5%

1.7 (1.2–2.4)

1.6 (1.1–2.4)

1.6 (1.1–2.4)

 Completed (Reference)

55

32.4%

266

44.5%

1.00

1.00

1.00

Currently employed

 Yes

69

40.4%

149

24.8%

2.1 (1.4–2.9)

2.0 (1.3–2.9)

2.0 (1.3–2.9)

 No (Reference)

102

59.6%

451

75.2%

1.00

1.00

1.00

Current marital status

 Single/divorce/separate/widow

31

18.1%

10

1.7%

12.9 (6.3–27)

9.4 (4.0–22)

9.7 (4.1–22.9)

 Married (Reference)

140

81.9%

589

98.3%

1.00

1.00

1.00

Fertility behaviour

 No informed decision on family size

89

52.0%

173

28.8%

2.5 (1.6–3.8)

2.0 (1.2–3.2)

2.3 (1.5–3.4)

 Informed decision made:

       

  Family completed

41

24.0%

230

38.3%

0.9 (0.5–1.4)

1.0 (0.6–1.6)

0.9 (0.5–1.4)

  Family not completed (Reference)

41

24.0%

197

32.8%

1.00

1.00

1.00

Gravid statusd

 Primigravid

36

21.1%

83

13.8%

1.7 (1.1–2.6)

2.5 (1.3–4.7)

2.8 (1.4–5.6)

 Non-primigravid (Reference)

135

78.9%

517

86.2%

1.00

1.00

1.00

At least one female child present

 No

90

52.6%

210

35.0%

2.1 (1.5–2.9)

2.1 (1.4–3.2)

2.1 (1.4–3.3)

 Yes (Reference)

81

47.4%

390

65.0%

1.00

1.00

1.00

  1. aLogistic Regression (LR) model showing adjusted odds ratio (OR) of factors significant for unsafe abortion
  2. bLR Model 1 with education level, employment, marital status, gravid status, fertility behaviour, having a female child and contraceptive practices in 2 categories: Non-use and Ineffective use as the independent variables; cases (unsafe abortion) and controls (term pregnancy) as the dependent variable
  3. cLR Model 2 with all the variables of LR Model 1 except contraceptive practices in 4 categories: Early discontinuation, Late discontinuation, Never-use and Ineffective use
  4. dPrimigravid = Gravid women who have ever had one pregnancy; Non primigravid = Gravid women who have had more than one pregnancy
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