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Table 6 Cox proportional hazards model on time until discontinuation of baseline method, by demographic. characteristics, number of living children, HIV status, and method type, N = 952.

From: Contraceptive use and discontinuation among women in rural North-West Tanzania

Factors Number of discontinuations Rates (95% CI)
per 100 women
Unadj HRs
(95% CI)
p-value Adjusted HRs (95% CI) p-value
HIV status
 Negative 341 3.17 (2.85,3.52) 1    
 Positive 32 2.94 (2.08,4.16) 0.83 (0.59,1.17) 0.2800 0.89 (0.63,1.29) 0.5200
Methods
 Implants 90 2.17 (1.76,2.66) 1    
 Pills 35 3.70 (2.66,5.16) 1.73 (1.17,2.56) 0.0060 1.86 (1.25,2.77) 0.0020
 Injection 225 4.19 (3.68,4.78) 1.97 (1.54,2.52) 0.0001 2.04 (1.59,2.61) 0.0001
 IUD 11 1.24 (0.69,2.25) 0.56 (0.30,1.05) 0.0710 0.60 (0.32,1.13) 0.1160
 Other methods 12 2.08 (1.18,3.66) 0.96 (0.52,1.75) 0.8850 1.07 (0.58,1.99) 0.8190
Age
 15–24 92 3.90 (3.18,4.78) 1    
 25–34 184 3.05 (2.64,3.53) 0.77 (0.60,0.99) 0.0390 0.72 (0.56,0.93) 0.0110
 35+ 97 2.74 (2.25,3.35) 0.68 (0.51,0.90) 0.0080 0.67 (0.50,0.90) 0.0070
Education
 None/some primary 98 3.32 (2.72,4.05) 1    
 Completed primary 222 3.06 (2.68,3.48) 0.92 (0.72,1.16) 0.4700   
 Secondary+ 52 3.05 (2.33,4.01) 0.92 (0.66,1.29) 0.6180
Number of living children
< 3 127 3.44 (2.89,4.09) 1    
 3+ 246 2.99 (2.64,3.39) 0.86 (0.69,1.06) 0.160