Skip to main content

Advertisement

Table 1 Results of protein C and protein S testing performed at diagnosis and on repeat testing after discontinuing anticoagulation therapy in patients with venous thromboembolism.

From: Normal levels of protein C and protein S tested in the acute phase of a venous thromboembolic event are not falsely elevated

  Protein C Protein S
  Current study (N = 99) Previous study[16] (N = 254) Current study (N = 99) Previous study[16](N = 254)
Initial normal result 99 242 99 242
Initial abnormal result 0 12 0 12
Repeat abnormal result 0 4a 0 6a
Proportion Abnormal on Repeat (95% CI) 0% (0-3.7%)b 40% (35.4-84.8%) b 0% (0-3.7%)b 63.9% (16.8-68.7%) b
  1. CI confidence interval
  2. a Repeat testing was done only if initial test abnormal
  3. b P-value < 0.001 for comparison between current and previous study