title: Evaluation of pre-analytical, demographic, behavioural and metabolic variables on fibrinolysis and haemostasis activation markers utilised to assess hypercoagulability.
abstract: BACKGROUND
  Measurement of some haemostatic factors and products formed during activation of haemostasis seems to be promising in the determination of hypercoagulability.
  
  
  METHODS
  The fibrinolytic variables euglobulin clot lysis time, tissue-type plasminogen activator, plasminogen activator inhibitor-1 and the haemostasis activation markers prothrombin fragment 1+2, thrombin-antithrombin complex and D-dimer were determined in 101 apparently healthy men and women aged 20-92 years (58+/-18 years, mean+/-SD) to establish variability due to several demographic, behavioural and metabolic factors.
  
  
  RESULTS
  None of the fibrinolytic variables were affected by smoking, while tissue-type plasminogen activator antigen was significantly lower in women compared to men. Multiple regression analysis revealed several independent associations between tissue-type plasminogen activator, plasminogen activator inhibitor, body mass index and lipid levels, describing up to 40% of the variance in fibrinolytic variables. For haemostasis activation markers, no gender difference or effect of smoking was observed. Only D-dimer was independently associated with age. The haemostasis activation markers determined proved to be extremely sensitive to blood sampling procedure and were significantly higher in samples obtained by an untrained nurse compared to a trained nurse.
  
  
  CONCLUSIONS
  Fibrinolytic variables are predominantly modulated by age, body mass index and blood lipids, while haemostasis activation markers are mainly un-influenced by these factors.
authors.affiliation: Department of Vascular Diseases, University Medical Centre, Ljubljana, Slovenia. mojca.stegnar@kclj.si
authors.forename: Mojca
authors.initials: M
authors.lastname: Stegnar
authors.forename: Tjasa Vizintin
authors.initials: TV
authors.lastname: Cuderman
authors.forename: Mojca
authors.initials: M
authors.lastname: Bozic
mesh_terms: D000328:Adult; D000368:Aged; D000886:Anthropometry; D000990:Antithrombin III / Q000378:metabolism; D001519:Behavior; D015415:Biomarkers / Q000378:metabolism*; D003710:Demography; D005260:Female; D005338:Fibrin Fibrinogen Degradation Products / Q000378:metabolism; D005342:Fibrinolysis / Q000502:physiology*; D006487:Hemostasis / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010446:Peptide Fragments / Q000378:metabolism; D010447:Peptide Hydrolases / Q000378:metabolism; D017395:Plasminogen Activator Inhibitor 1 / Q000378:metabolism; D011516:Prothrombin / Q000378:metabolism; D019851:Thrombophilia / Q000175:diagnosis* / Q000378:metabolism; D010959:Tissue Plasminogen Activator / Q000378:metabolism
chemical_list: D015415:Biomarkers; D005338:Fibrin Fibrinogen Degradation Products; D010446:Peptide Fragments; D017395:Plasminogen Activator Inhibitor 1; C046193:antithrombin III-protease complex; C036309:fibrin fragment D; C045879:prothrombin fragment 1.2; D000990:Antithrombin III; D011516:Prothrombin; D010447:Peptide Hydrolases; D010959:Tissue Plasminogen Activator