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Table 1 Characteristics of study population by mother's region of origin (in %), 2004-2007, (N = 2,623,064)

From: Stillbirth differences according to regions of origin: an analysis of the German perinatal database, 2004-2007

  Germany    Middle and Northern Europe,    Mediterranean    Eastern Europe    Middle East,    Asia    p value*
   North America       North Africa   
Number of births 2,166,005    37,854    85,874    138,217    164,341    30,773  
Single status        
   No 76.7    83.6    86.1    85.4    90.1    83.9    < 0.0001
   Yes 14.9    9.0    6.8    8.4    4.0    8.5  
   Missing 8.4    7.4    7.0    6.1    5.9    7.5  
Social status        
   Low 31.8    45.4    59.8    56.1    71.4    62.0    < 0.0001
   Middle 37.8    24.1    16.3    21.6    9.6    13.4  
   High 13.5    12.4    4.4    5.2    2.2    4.4  
   Missing 16.9    18.1    19.6    17.1    16.8    20.3  
Maternal age (years)        
   < 18 0.7    0.3    0.6    0.5    0.3    0.2    < 0.0001
   18-29 43.4    42.3    55.8    60.6    59.2    45.0  
   30-34 31.2    32.3    28.2    26.2    25.8    30.8  
   35-39 20.3    20.3    12.7    10.4    11.8    19.4  
   ≥ 40 4.4    4.8    2.6    2.4    2.8    4.7  
Maternal smoking (during pregnancy)        
   No 72.9    72.7    67.7    71.0    73.3    79.3    < 0.0001
   Yes 10.9    6.2    11.2    7.3    9.2    1.8  
   Missing 16.2    21.1    21.2    21.7    17.4    18.9  
Parity        
   0 42.5    35.9    32.9    35.7    29.3    36.0    < 0.0001
   1 32.1    33.4    32.0    32.1    29.4    33.7  
   ≥ 2 25.4    30.7    35.0    32.2    41.3    30.3  
Multiple births        
   Singletons 96.6    96.7    96.9    97.3    97.0    97.8    < 0.0001
   Twins or more 3.4    3.3    3.1    2.7    3.0    2.2  
Gestational age (weeks) & birth weight (g)        
   < 37 & < 2500 4.5    4.1    4.1    3.8    4.3    4.2    < 0.0001
   ≥ 37 & < 2500 2.7    2.3    2.6    2.0    2.6    2.9  
   < 37 & ≥ 2500 1.7    1.6    1.5    1.6    1.6    1.5  
   ≥ 37 & ≥ 2500 91.1    92.0    91.7    92.6    91.5    91.4  
Number of antenatal visits        
   0-04 1.4    2.6    2.8    3.1    2.2    3.3    < 0.0001
   5-07 4.3    6.9    7.9    7.8    7.8    9.0  
   8-11 43.1    42.3    47.2    47.0    50.0    49.4  
   ≥ 12 43.1    37.9    33.0    34.7    32.9    29.4  
   Missing 8.1    10.3    9.2    7.4    7.2    8.9  
First antenatal visit (gestational week)        
   < 9. 46.5    40.3    42.2    39.7    44.9    35.8    < 0.0001
   9.-12. 37.5    34.7    35.6    36.9    36.0    38.0  
   13.-16. 5.7    7.7    7.7    8.8    7.6    9.5  
   ≥ 17. 3.1    8.0    5.9    8.2    5.0    9.3  
   Missing 7.2    9.3    8.6    6.4    6.5    7.4  
Congenital anomalies        
   No 99.0    98.9    98.8    98.9    99.0    99.0    < 0.001
   Yes 1.0    1.1    1.2    1.1    1.0    1.0  
  1. * p value for a chi-square test