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Table 5 Adjusted analysis of factors associated with inadequacy of prenatal care use, Aracaju, SE, 2005.

From: Risk factors for inadequate prenatal care use in the metropolitan area of Aracaju, Northeast Brazil

  Modified APNCU (Adequacy of prenatal care use index)*
Variable Inadequate Adequate   
  n % n % Adjusted OR 95%CI
Maternal age (years)
   < 18 225 51.3 214 48.7 4.10 2.81 – 5.99
   18 to 34 1206 32.7 2488 67.3 2.03 1.50 – 2.76
   ≥ 35 (reference) 81 25.8 233 74.2   
Maternal schooling (years)
   ≤ 4 445 51.0 428 49.0 1.72 1.40 – 2.11
   5 to 8 654 41.3 930 58.7 1.43 1.21 – 1.70
   ≥ 9 (reference) 433 20.9 1636 79.1   
Family income (minimum wages)
   > 1 270 50.0 270 50.0 1.39 1.08 – 1.79
   1 to < 3 988 37.9 1617 62.1 1.30 1.08 – 1.56
   ≥ 3 (reference) 270 19.4 1120 80.6   
Number of deliveries
   ≤ 1 (reference) 585 27.8 1518 72.2   
   2 to 4 800 36.7 1379 63.3 1.50 1.28 – 1.74
   ≥ 5 155 57.4 115 42.6 2.69 1.96–3.69
Cohabiting partner
   Yes 1141 31.1 2527 68.9   
   No 399 45.1 485 54.9 1.65 1.39 – 1.94
Municipality of prenatal care assistance
   Aracaju (reference) 936 30.9 2093 69.1   
   Others 604 39.7 919 60.3 1.18 1.02 – 1.36
Type of assistance
   Private 109 11.0 886 89.0 0.34 0.27 – 0.43
   Public (reference) 1355 39.0 2123 61.0   
Maternal smoking during pregnancy
   Yes 152 61.8 94 38.2 2.25 1.69 – 2.99
   No 1387 32.2 2918 67.8   
  1. Modified APNCU index: inadequate = absent + inadequate + intermediary
  2. adequate = adequate + intensive
  3. OR – Odds ratio; CI – Confidence Interval