Figure 2From: Validity and reliability of the Spanish version of the DN4 (Douleur Neuropathique 4 questions) questionnaire for differential diagnosis of pain syndromes associated to a neuropathic or somatic componentCut-off point in the DN4 questionnaire optimizing the sensitivity and specificity values for discriminating between pure neuropathic pain (excluding patients with mixed pain) and non-neuropathic pain.Back to article page