SECTION 1 – SYMPTOMS
Each symptom scores 1 point. Each symptom cluster (denoted by shading), where every symptom within that cluster is positive, scores 1 point. For example, the first symptom – fatigue, represents a cluster, if this is positive, the symptom cluster score is 1. If all symptoms in the second cluster, beginning with weakness, are positive, this cluster scores 1.
OUTCOMES
• A score of 8 or more of the 13 clusters is considered diagnostic (98.4% sensitivity in adults)
• A score of 3 out of 3 of in section 2 indicates treatment is recommended (73.3% specificity, 97.7% positive predictive value)
*VCS test available from: https://www.vcstest.com
**Measured using a dynamometer if available