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Table 1 Distribution of 10 clinically and 5 genetically relevant variables in a cohort of young women at baseline of the observational period 1993 – 2003. The total number of women in this analysis is 4320, i.e. excluding 17 women with a final diagnosis of a possible/potential VTE. Deviations from this number are due to missing data

From: VTE Risk assessment – a prognostic Model: BATER Cohort Study of young women

Variables    
Continuous variables   n Mean (SD)
Age (years)   4320 26.0 (8.6)
Life births, number   1910 1.7 (0.8)
BMI§   4309 23.3 (4.1)
Protein C (unit/dl)   4315 102.4 (15.8)
AT III (unit/dl)   4316 98.4 (11.3)
Categorical parameters    Percent (%)
Own history of VTE No 4279 99.0
  Yes 41 1.0
Family history No 3840 88.9
  Yes 480 11.1
Age, alternative <30 2843 65.8
  ≥ 30 1477 34.2
Family history of varicous veins No 2395 55.4
  Yes 1925 44.6
Family history of MI No 3830 88.7
  Yes 490 11.3
BMI, alternative <25 3218 74.7
  ≥ 25 1091 25.3
Ever use of hormone replacement No 4031 93.7
  Yes 270 6.3
Family history of stroke No 4013 92.9
  Yes 307 7.1
Ever use of oral contraceptives No 346 8.0
  Yes 3973 92.0
Education level: University entrance diploma No 3119 73.2
  Yes 1139 26.8
Ever smoker No 2022 46.8
  Yes 2296 53.2
Laboratory parameters    
Factor V Leiden mutation1 No 4035 93.7
  Yes 271 6.3
Prothrombin mutation1 No 4088 96.6
  Yes 142 3.4
MTHFR1 No 1798 42.5
  Yes 2432 57.5
Protein C: ≥ 77(unit/dl) No 4117 95.4
<77 (5th percentile; unit/dl) Yes 198 4.6
AT III: ≥ 81(unit/dl) No 4106 95.1
<81 (5th percentile; unit/dl) Yes 210 4.9
  1. 1 Homozygote & heterozygote together
  2. § Body mass index (kg/m2)