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Table 2 Poisson regression describing differences in adjusted number of antenatal visits

From: Determinants of the number of antenatal visits in a metropolitan region

Variable   Adjusted visits Adjusted visit ratiof 95%CIg p-value
Predisposing characteristics      
Origin EU 15a 10.60 e 1 e   
  Maghreb and Turkey   0.86 0.79-0.92 0.0001
  Sub-Saharan African   0.94 0.85-1.03 0.2059
  Other   0.94 0.85-1.05 0.3193
Educational level Not finished secondary school 9.18 e 1 e   
  Secondary school   1.03 0.93-1.14 0.5198
  Higher education   1.22 1.10-1.35 0.0001
Enabling characteristics      
Equivalent income b Low 9.20e 1 e   
  Moderate   1.09 1.01-1.19 0.0353
  High   1.14 1.02-1.27 0.0196
Pregnancy related characteristics      
Parity Primiparae 10.72 e 1 e   
  Multiparae   0.85 0.80-0.91 <0.0001
Gestational age at initiation of care Before week 14 11.89 e 1 e   
  After week 14   0.69 0.58-0.82 <0.0001
High risk status during antenatal carec Yes 10.56 e 1 e   
  No   0.88 0.81-0.96 0.0036
Gestational age at delivery Before week 37 8.98 e 1 e   
  After week 37   1.22 1.07-1.39 0.0028
Continuity Of Care indexd COC <50% 10.56 e 1 e   
  COC >= 50%   0.88 0.82-0.94 0.0009
  1. a Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, the Netherlands, Austria, Portugal, Spain, Sweden and the United Kingdom;
  2. bΣ incomes in the household/(1+(a*0.5)+(c*0.3)) with a: number of adults living in the same household of the wife(wife not included), c: number of children under the age of 18 living in the same household (OECD scale)[26];
  3. c hypertension, pre-eclampsia, gestational diabetes mellitus, preterm contractions, hospitalization, anaemia
  4. d Bice index or Continuity of Care index: COC = n j 2 n n ( n 1 ) (Bice, 1977)[31, 32]
  5. nj is the total number of visits to a provider
  6. n is the total number of visits;
  7. e baseline;
  8. f Adjusted for effects of origin, educational level, equivalent income, parity, gestational age at booking, risk status during antenatal care, gestational age at delivery and Continuity of carer index;
  9. g CI = Confidence interval.