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Table 1 Socio-Demographic and Reproductive Characteristics and Infant Outcomes in the Study Population, Lima, Peru, 2006-2008

From: Risk of placental abruption in relation to migraines and headaches

Characteristics Placental Abruption p-value
  Cases (N = 375) Controls (N = 368)  
  n % n %  
Maternal Age at Delivery (years) 28.4 ± 6.71   28.0 ± 6.3   0.38
Maternal Age at Delivery (years)      
   < 20 39 10.4 30 8.2 0.30
   20-29 174 46.4 191 51.9  
   30-34 86 22.9 78 21.2  
   ≥ 35 75 20.0 67 18.2  
   Missing 1 0.3 2 0.5  
Parity 1.32 ± 1.501   1.46 ± 1.51   0.19
   0 161 42.9 146 39.7 0.63
   1-2 143 38.1 145 39.4  
   ≥ 3 71 18.9 77 20.9  
≤ High School Education 241 64.3 216 58.7 0.29
Employed during Pregnancy 186 49.6 176 47.8 0.66
Planned Pregnancy 133 35.5 115 31.3 0.47
No Prenatal Care 41 10.9 22 6.0 0.02
No Prenatal Vitamin 57 15.2 45 12.2 0.38
Smoking during Pregnancy 8 2.1 6 1.6 0.48
Alcohol use during Pregnancy 35 9.3 30 8.2 0.67
Illicit Drug use during Pregnancy 2 0.5 1 0.3 - - -
Depressive Symptoms3 33 8.8 10 2.7 < 0.001
Pre-pregnancy Body Mass Index (kg/m2) 23.7 ± 3.71   23.4 ± 3.5   0.31
Pre-pregnancy Body Mass Index (kg/m2)      
   < 19.8 39 10.4 38 10.3 0.38
   19.8-26.0 227 60.5 245 66.6  
   26.1-29.0 47 12.5 36 9.8  
   ≥ 29.0 27 7.2 25 6.8  
   Missing 35 9.3 24 6.5  
Chronic Hypertension 20 5.3 10 2.7 0.07
Preeclampsia or Eclampsia 98 26.1 11 3.0 < 0.001
Previous History of Placental Abruption 2 0.9 1 0.5 0.62
Infant Birth Weight (grams)2 2438 ± 8601   3306 ± 502   < 0.001
Low Birth Weight Infant (< 2500 grams)2 196 52.3 17 4.6 < 0.001
Gestational Age at Delivery (weeks)2 35.3 ± 3.81   38.7 ± 1.8   < 0.001
Preterm Delivery Infant (< 37 weeks)2 204 54.4 20 5.4 < 0.001
C-Section Delivery 357 95.3 144 39.1 < 0.001
Stillbirth Delivery 59 15.7 0 0.0 - - -
  1. 1Mean ± SD (SD: standard deviation)
  2. 2Restricted to live birth only (314 cases and 368 controls)
  3. 3PHQ-9 depression symptom score ≥ 10, consistent with moderate or severe depression