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Table 2 Case definition items to be included in a questionnaire instrument for epidemiology research

From: Towards a definition of refractory neuropathic pain for epidemiological research. An international Delphi survey of experts

Questions about pain characteristics:
Prickling, tingling, pins and needles
Pain evoked by light touch
Electric shocks or shooting pain
Hot or burning pain
Brush allodynia on self examination
Question eliciting a relevant patient history
Items that might be included (>30% but <70% consensus)
Questions about pain characteristics:
Pain evoked by heat or cold
Pain continuing after stimulus
Surface pain
Pain evoked by mild pressure
Question about the site of pain