The ‘funnel effect’ of Fibromyalgia (FM) assumes that as patients access healthcare services, they present greater severity and a more complex clinical situation than individuals with FM from the general… Click to show full abstract
The ‘funnel effect’ of Fibromyalgia (FM) assumes that as patients access healthcare services, they present greater severity and a more complex clinical situation than individuals with FM from the general population, but the studies comparing patients treated in different levels of healthcare are scarce. The aim of this study was to analyse the ‘funnel effect’ hypothesis by comparing patients from secondary and tertiary healthcare services.
               
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