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Table 3 Proportional Hazards Model: Multivariate hazard ratios of associations between characteristics collected during childhood and later teenage pregnancy

From: Antecedents of teenage pregnancy from a 14-year follow-up study using data linkage

Parameter Hazard Ratio 95% CI p value
Family type    
   Original 1.00 (ref)   
   Sole-parent 1.10 0.69 - 1.76 0.6934
   Step/blended 2.19 1.41 - 3.40 <0.001
CBCL score (child) - Aggressive and    
Delinquent    
   Neither 1.00 (ref)   
   Aggressive and Delinquent 3.52 1.90 - 6.55 <0.001
   Aggressive or Delinquent 1.24 0.71 - 2.14 0.448
Combined carer income    
   High 1.00 (ref)   
   Medium 0.93 0.55 - 1.58 0.794
   Low 1.72 1.01 - 2.92 0.045
Highest school year completed by primary carer    
   Year 10 or higher 1.00 (ref)   
   Year 9 or lower 1.71 1.14 - 2.57 0.009
Region    
   Metropolitan 1.00 (ref)   
   Non-Metropolitan 1.52 1.09 - 2.11 0.014
Whether primary carer was a smoker    
   No 1.00 (ref)   
   Yes 1.63 1.14 - 2.31 0.007