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Table 2 Multivariate polytomous logistic regression of factors associated with ANC initiation in the 2 nd and 3 rd trimesters relative to 1 st trimester in three districts in Tanzania, 2011 (n = 777)

From: How mistimed and unwanted pregnancies affect timing of antenatal care initiation in three districts in Tanzania

  ANC initiation in the 2ndtrimester relative to 1sttrimester ANC initiation in the 3 rdtrimester relative to 1sttrimester
Variable Related risk ratio (RRR) 95% confidence interval (CI) Related risk ratio (RRR) 95% confidence interval (CI)
Pregnancy intensions     
 Intendeda 1.00 - 1.00 -
 Mistimed 1.68** 1.10-2.58 2.81 1.41-5.59
 Unwanted 2.00* 1.05-3.82 4.10*** 1.68-10.00
Gravidity-Age intentions     
 Gravidity 1.58* 1.04-2.39 2.27** 1.21-4.27
 Age 1.06* 1.01-1.12 1.04 0.96-1.13
 Gravidity*Age 0.99 0.98-1.00 0.98* 0.97-1.00
Education     
 None (never been to school)a 1.00 - 1.00 -
 Primary/higher 0.83 0.50-1.38 2.12 0.81-5.57
Household wealth     
 Poora 1.00 - 1.00 -
 Middle 1.11 0.71-1.75 1.31 0.62-2.77
 Rich 1.73 0.98-3.06 2.38* 1.01-5.64
Marital status     
 Marrieda 1.00 - 1.00 -
 Ever married 1.45 0.53-3.95 3.09 0.86-11.08
 Single 1.21 0.69-2.11 1.61 0.15-17.79
Religion     
 Christiana 1.00 - 1.00 -
 Muslim 1.31 0.85-2.02 0.9 0.46-1.79
 Other (e.g. traditional) 2.41 0.71-8.21 1.61 0.15-17.79
District     
 Kilomberoa 1.00 - 1.00 -
 Rufiji 0.97 0.55-1.69 0.90 0.36-2.26
 Ulanga 0.66 0.38-1.12 0.45 0.17-1.16
Travel time to health facility (hours) 1.23 0.95-1.59 1.26 0.86-1.84
  1. ***P<0.01, **P<0.02, *P<0.05; aReference/baseline category.