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Table 3 Adjusted hazard ratios for age at first birth by region

From: A survival analysis of the timing of onset of childbearing among young females in Nigeria: are predictors the same across regions?

  North Central North East North West South East South South South West
HR (95% CI) HR (95% CI) HR (95% CI) HR (95% CI) HR (95% CI) HR (95% CI)
Location
 Urban (RC)
 Rural 0.97 (0.78–1.20) 1.00(0.84–1.21) 0.97 (0.82–1.15) 1.25 (0.96–1.63) 1.01 (0.83–1.23) 1.10 (0.84–1.44)
Education
 No education (RC)
 Primary 0.99 (0.79–1.24) 0.89 (0.75–1.06) 0.96 (0.83–1.12) 1.22 (0.43–3.49) 1.17 (0.69–1.97) 1.16 (0.78–1.72)
 Secondary 0.75 (0.60–0.93)** 0.67 (0.55–0.81)*** 0.63 (0.52–0.77)*** 0.91 (0.333–2.53) 0.85 (0.51–1.42) 0.84 (0.57–1.24)
 Higher 0.68 (0.42–1.11) 0.27 (0.14–0.51)*** 0.41 (0.20–0.86)* 0.26 (0.72–0.92)* 0.30 (0.14–0.62)** 0.46 (0.28–0.77)**
Religion
 Catholics (RC)
 Other Christians 1.14 (0.88–1.48) 0.94 (0.63–1.40) 0.34 (0.21–0.55)*** 0.99 (0.78–1.25) 1.46 (1.08–1.96)* 1.25 (0.73–2.12)
 Muslims 1.06 (0.78–1.43) 0.89 (0.60–1.32) 0.38 (0.26–0.57)*** 0.87 (0.32–2.42) 1.36 (0.70–2.63) 1.11 (0.63–1.94)
Wealth quintile
 Poorest (RC)
 Poorer 0.99 (0.74–1.32) 0.96 (0.83–1.10) 0.86 (0.78–0.96)** 0.54 (0.33–0.90)* 0.76 (0.24–2.43) 0.47 (0.25–0.89)*
 Middle 0.91 (0.68–1.22) 0.82 (0.68–0.99)* 0.77 (0.666–0.89)** 0.75 (0.46–1.22) 0.75 (0.24–2.37) 0.64 (0.34–1.23)
 Richer 0.66 (0.47–0.92)* 0.81 (0.64–1.03) 0.82 (0.65–1.04) 0.53 (0.33–0.87)* 0.55 (0.18–1.75) 0.53 (0.27–1.03)
 Richest 0.51 (0.34–0.77)** 0.69 (0.48–0.99)* 0.69 (0.50–0.97)* 0.47 (0.27–0.80)** 0.37 (0.12–1.20) 0.44 (0.21–0.90)
Ever/never married
 Single never married
 Ever married/cohabited 20.37 (14.69–28.25)*** 11.31 (8.35–15.31)*** 44.62 (25.06–79.46)*** 10.55 (8.08–13.757)*** 5.35 (4.53–6.32)*** 12.66 (9.57–16.75)***
Statea
 Reference state
 State 2 0.84 (0.61–1.15) 1.02 (0.82–1.28) 1.13 (0.95–1.35) 0.90 (0.63–1.29) 1.92 (1.37–2.68)*** 0.80 (0.56–1.15)
 State 3 0.73 (0.56–0.95)* 1.27 (1.02–1.58)* 1.18 (0.99–1.40) 1.32 (0.91–1.90) 2.05 (1.50–2.81)*** 1.00 (0.69–1.45)
 State 4 0.66 (0.49–0.89)** 1.16 (0.95–1.42) 1.11 (0.93–1.31) 0.89 (0.57–1.39) 1.46 (1.04–2.03)* 1.15 (0.82–1.61)
 State 5 0.85 (0.6–1.17) 1.41 (1.17–1.69)*** 0.94 (0.79–1.11) 0.94 (0.63–1.40) 2.26 (1.68–3.05)*** 0.94 (0.65–1.36)
 State 6 0.83 (0.62–1.10) 1.37 (1.10–1.71)** 1.26 (1.03–1.53)*   1.48 (1.08–2.02)* 1.17 (0.83–1.65)
 State 7 0.75 (0.57–0.98)*   0.93 (0.77–1.11)    
  1. HR Hazard Ratio, RC Reference Category, CI Confidence Interval
  2. * p < 0.05, ** p < 0.01, *** p < 0.001
  3. a North Central states: Ref state – Niger, State 2 – FCT, State 3 – Nasarawa, State 4 – Plateau, State 5 – Benue, State 6 – Kogi, State 7 – Kwara
  4. North East states: Ref state – Yobe, State 2 – Borno, State 3 – Adamawa, State 4 – Gombe, State 5 – Bauchi, State 6 – Taraba
  5. North West states: Ref state – Sokoto, State 2 – Zamfara, State 3 – Katsina, State 4 – Jigawa, State 5 – Kano, State 6 – Kaduna, State 7 – Kebbi
  6. South East states: Ref state – Anambra, State 2 – Enugu, State 3 – Ebonyi, State 4 – Abia, State 5 – Imo
  7. South South states: Ref state – Edo, State 2 – Cross River, State 3 – Akwa Ibom, State 4 – Rivers, State 5 – Bayelsa, State 6 – Delta
  8. South West states: Ref state – Oyo, State 2 – Osun, State 3 – Ekiti, State 4 – Ondo, State 5 – Lagos, State 6 – Ogun