Understanding Results

Obtaining Results

Vectra® test results will be available approximately 5-7 calendar days from shipment to Crescendo Bioscience. Results are returned by fax, mail or via the VectraView™ portal.

Interpreting Results

Vectra categorizes RA disease activity into low, moderate, or high disease activity.

Vectra score Level of disease activity


The Vectra cutoffs were selected to correspond to cutoffs on the DAS28-CRP scale.1

High Vectra scores have been associated with a higher risk of radiographic progression – low/moderate scores have been identified with a lower risk.2,3

These thresholds are provided as a guide and a complement to your clinical judgment to help inform patient management. If you have questions or would like assistance in interpreting a Vectra result, please contact Crescendo Bioscience at 1-877-RHEUMDX (1-877-743-8639) to request a consultation with a member of Crescendo’s Medical Affairs Team.

Note: We encourage practices to set -up a consultation after they have had experience with Vectra in 25+ RA patients and/or 6 months has passed since ordering the initial Vectra test. Many of your rheumatology colleagues have found these consultations informative for understanding and interpreting the test results.


What to do with a Moderate Vectra score

Sample Test Results

An initial Vectra score provides an objective, quantitative starting point to track RA disease activity over time with subsequent testing.

To view a Test Report click here.



VectraView is an online analytical tool that enables you to draw insights from Vectra results at the individual patient or practice level.
VectraView allows you to:

  • Access all of your patients’ Vectra results in one place through a convenient online portal
  • Store and access disease activity measurements alongside Vectra results*
  • View Vectra scores displayed in the context of your patients’ medications*
  • View Vectra results for all tested patients in one view and filter to identify patients for follow-up
  • Save time – Order subsequent Vectra tests using prefilled test requisition forms

Enroll here

* Physician practice input required


* 1. Inoue E, Yamanaka H, Hara M et al. Comparison of Disease Activity Score (DAS)28-erythrocyte sedimentation rate and DAS28-C-reactive protein threshold values. Ann Rheum Dis. 2007;66:407-409.

* 2. Hambardzumyan K, Bolce R, Saevarsdottir S et al. Pre-treatment multi-biomarker disease activity score and radiographic progression in early RA: results from the SWEFOT trial. Ann Rheum Dis 2014. doi:10.1136/annrheumdis-2013-204986

* 3. van der Helm-van Mil AHM, Knevel R, Cavet G et al. An evaluation of molecular and clinical remission in rheumatoid arthritis by assessing radiographic progression. Rheumatology. 2013. doi:10.1093/rheumatology/kes378.