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Table 2 Distribution of pre-pregnancy variables and differences associated with peripartum blood transfusion in women undergoing NHSE within one year before conception

From: Predicting peripartum blood transfusion: focusing on pre-pregnancy characteristics

  No Transfusion
436,668 (98.21%)
Transfusion
7960 (1.79%)
p-value
Waist circumference (cm) ≥ 80 47,317 (10.80%) 838 (10.49%) 0.3695
Body mass index (kg/m2) 21.05 ± 2.87 21.09 ± 2.93 0.2
Body mass index (kg/m2) ≥ 25 39,454 (9.00%) 750 (9.38%) 0.2428
Systolic blood pressure (mmHg) 110.1 ± 10.84 110.5 ± 11.24 <  0.001
Diastolic blood pressure (mmHg) 69.19 ± 8.12 69.55 ± 8.35 <  0.001
Blood pressure ≥ 130/85 (mmHg) 30,349 (6.92%) 664 (8.30%) <  0.001
Hemoglobin 12.93 ± 1.01 12.70 ± 1.19 <  0.001
Fasting glucose (mg/dL) 87.81 ± 11.36 88.58 ± 12.54 <  0.001
Fasting glucose ≥126 42,380 (9.67%) 900 (11.26%) <  0.001
Total cholesterol (mg/dL) 176.9 ± 31.55 177.2 ± 36.46 0.4163
Total cholesterol (mg/dL) ≥ 200 87,585 (19.98%) 1646 (20.59%) 0.1772
AST (IU/L) 19.24 ± 12.77 19.48 ± 11.03 <  0.05
AST (IU/L) ≥ 30 18,724 (4.27%) 385 (4.81%) <  0.05
ALT (IU/L) 15.38 ± 16.83 15.70 ± 16.73 0.087
ALT (IU/L) ≥ 30 21,314 (4.86%) 444 (5.55%) <  0.01
Smoking
 Never 407,408 (93.21%) 7403 (92.89%) <  0.05
 Ever 15,480 (3.54%) 264 (3.31%)  
 Current 14,190 (3.25%) 303 (3.80%)  
  1. Abbreviations: AST Aspartate aminotransferase, ALT Alanine aminotransferase