Table 3 Factors associated with modern contraception use among unmarried sexually active women aged 15–19 years in Ogun, South Western Nigeria, (N = 1737)

Sociodemographic factors

 Age (years)

  15

60

20 (33.3)

  16

113

48 (42.5)

  17

221

94 (42.5)

  18

522

285 (54.6)

  19

821

389 (47.4)

  Per year increase

1.10 (1.00–1.20)

 Religion

  Catholic

34

18 (52.9)

1

  Protestant/other christian

1119

553 (49.4)

0.87 (0.47–1.6)

  Muslim

578

264 (45.7)

0.75 (0.40–1.4)

  Traditional

6

1 (16.7)

0.18 (0.02–1.7)

 Highest education level achieved^a

  No education/primary

115

32 (27.8)

1

1

  Secondary

1459

698 (47.8)

2.4 (1.6–3.6)

2.4 (1.5–3.6)

  Higher education

163

106 (65.0)

4.8 (2.8–8.2)

4.6 (2.7–8.0)

< 0.001

 Currently in education^a

  Yes

549

284 (51.7)

1

1

  No

1188

552 (46.5)

0.81 (0.66–0.99)

0.73 (0.59–0.90)

0.003

Type of residence^a

  Urban

630

334 (53.0)

1

1

  Semi-urban

719

349 (48.5)

0.84 (0.67–1.0)

0.84 (0.67–1.0)

  Rural

388

153 (39.4)

0.58 (0.44–0.76)

0.59 (0.45–0.77)

< 0.001

 Socioeconomic level^a

  Lowest to middle quintile

66

18 (27.3)

1

1

  Second highest quintile

334

144 (43.1)

2.0 (1.1–3.8)

2.0 (1.1–3.8)

  Highest quintile

1301

664 (51.0)

2.8 (1.5–5.1)

2.7 (1.5–5.0)

< 0.001

Exposure to information about contraception

 Heard about contraception in the media in last 12 months?^b

  Yes

380

227 (59.7)

1

1

  No

1197

577 (48.2)

0.63 (0.50–0.79)

0.65 (0.51–0.82)

< 0.001

 Heard about contraception from health sector sources in last 12 months?^b

  Yes

394

248 (62.9)

1

1

  No

1183

556 (47.0)

0.52 (0.41–0.67)

0.53 (0.42–0.68)

< 0.001

 Heard about contraception from interpersonal sources in last 12 months?^b

  Yes

946

496 (52.4)

1

1

  No

631

308 (48.8)

0.87 (0.70–1.1)

0.88 (0.71–1.1)

0.25

 Knows a place where or a person from whom she would feel comfortable accessing contraception?^b

  Yes

639

369 (57.8)

1

1

  No

870

396 (45.5)

0.61 (0.50–0.75)

0.65 (0.53–0.81)

  Don’t know

63

35 (55.7)

0.91 (0.54–1.6)

0.95 (0.55–1.6)

< 0.001

Social networks

 Perception that partner supports her using contraception^b

  Yes

1018

643 (63.2)

1

1

  No

325

101 (31.1)

0.26 (0.20–0.34)

0.27 (0.20–0.35)

  Don’t know

193

44 (22.8)

0.17 (0.12–0.25)

0.17 (0.12–0.25)

< 0.001

 Perception that mother supports her using contraception^b

  Yes

358

195 (54.5)

1

1

  No

710

364 (51.3)

0.88 (0.69–1.1)

0.87 (0.67–1.1)

  Don’t know

341

163 (47.8)

0.77 (0.57–1.0)

0.76 (0.56–1.0)

0.20

 Perception that friends supports her using contraception^b

  Yes

892

519 (58.2)

1

1

  No

333

43.2 (144)

0.55 (0.43–0.70)

0.54 (0.42–0.70)

  Don’t know

352

40.1 (141)

0.48 (0.37–0.62)

0.48 (0.37–0.63)

< 0.001

Individual knowledge, attitudes and behaviours

 Knowledge about contraception^b

  0–1

58

22 (37.9)

1

1

  2–3

316

148 (46.8)

1.4 (0.81–2.6)

1.4 (0.74–2.5)

  4–5

1203

634 (52.7)

1.8 (1.0–3.2)

1.7 (0.95–3.1)

0.08

 Misconceptions about contraception

  0–1

494

251 (50.8)

1

  2–3

813

422 (51.9)

(0.83–1.3)

  4

270

131 (48.5)

0.91 (0.66–1.3)

 Self-efficacy for contraception^b

  0–1

277

90 (32.5)

1

1

  2–3

608

281 (46.2)

1.8 (1.3–2.4)

1.7 (1.2–2.3)

  4

743

460 (61.9)

3.4 (2.5–4.6)

3.1 (2.3–4.2)

< 0.001

 Ever been pregnant

  Yes

385

191 (49.6)

1

  No/don’t know

1352

645 (47.7)

0.93 (0.75–1.1)

 Ever given birth^b

  Yes

165

61 (37.0)

1

1

  No

1572

775 (49.3)

1.7 (1.2–2.3)

1.5 (1.1–2.1)

0.01