Transcultural, transdiagnostic, and concurrent validity of a revised metacognitions about symptoms control scale.

Anxiety and depression add to the burden of chronic fatigue syndrome (CFS), fibromyalgia (FM), and type 1 diabetes mellitus (T1DM). Metacognitions play a role in this distress. The metacognitions about symptoms control scale (MaSCS) measure metacognitive beliefs regarding symptoms but have weaknesses.