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Table 3 Descriptive statistics for all 2,311 females (age 15-49 years) with VTE in the Swedish population and their matched controls

From: Family history of venous thromboembolism is a risk factor for venous thromboembolism in combined oral contraceptive users: a nationwide case-control study

  CASES CONTROLSa
  Contraceptives   Contraceptives  
  No Yes All No Yes All
Age (years)b 36.4 (9.5)a  
No VTE in relative 1,395 (72.9) 520 (27.2) 1,915 (82.9) 9,013 (85.5) 1,535 (14.6) 10,548 (91.3)
VTE in relative 361 (91.2) 35 (8.8) 396 (17.1) 962 (95.5) 45 (4.5) 1,007 (8.7)
  1,756 (76.0) 555 (24.0) 2,311 9,975 (86.3) 1,580 (13.7) 11,555
  1. Numbers of cases are shown with percentages in brackets. aControls were
  2. matched on age and education. bThe mean age (standard deviation within brackets)