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

From: Modern contraceptive use among unmarried girls aged 15–19 years in South Western Nigeria: results from a cross-sectional baseline survey for the Adolescent 360 (A360) impact evaluation

Exposure category No Prevalence, n (%) Unadjusted OR (95% CI) p value Adjusted OR (95% CI) p value
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) 0.04  
 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) 0.22   
 Highest education level achieveda
  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) < 0.001 4.6 (2.7–8.0) < 0.001
 Currently in educationa
  Yes 549 284 (51.7) 1   1  
  No 1188 552 (46.5) 0.81 (0.66–0.99) 0.04 0.73 (0.59–0.90) 0.003
Type of residencea
  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) < 0.001 0.59 (0.45–0.77) < 0.001
 Socioeconomic levela
  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) < 0.001 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) < 0.001 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) < 0.001 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) 0.18 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) < 0.001 0.95 (0.55–1.6) < 0.001
Social networks
 Perception that partner supports her using contraceptionb
  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) < 0.001 0.17 (0.12–0.25) < 0.001
 Perception that mother supports her using contraceptionb
  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) 0.19 0.76 (0.56–1.0) 0.20
 Perception that friends supports her using contraceptionb
  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) < 0.001 0.48 (0.37–0.63) < 0.001
Individual knowledge, attitudes and behaviours
 Knowledge about contraceptionb
  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) 0.03 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) 0.64   
 Self-efficacy for contraceptionb
  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) < 0.001 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) 0.48   
 Ever given birthb
  Yes 165 61 (37.0) 1   1  
  No 1572 775 (49.3) 1.7 (1.2–2.3) 0.002 1.5 (1.1–2.1) 0.01
  1. P value from design based Wald test
  2. aAdjusted ORs: adjusted for age
  3. bAdjusted ORs: adjusted for age, highest education level achieved, currently in education, type of area of residence and socioeconomic position