The mPDQ-NL is a self-report questionnaire consisting of 12 items about neuropathic pain symptoms of the left or right knee or hip during the past week. The first item assesses the presence of pain radiation using a body map. The second item assesses the pain pattern, where patients have to choose between four figures representing distinctly described pain patterns. The following seven items rank pain quality on a 6-point Likert scale, 1 representing “never” and 5 representing “very strongly”. These items respectively assess burning sensation , tingling or prickling sensation , pain at light touch , sudden pain attacks , pain at cold or warm stimulus , numbness and pain at light pressure . The final three items rank pain intensity on a 0–10 numeric rating scale (NRS), where 0 represents “no pain” and 10 represents “excruciating pain”. These final three items are about “pain at this moment”, “worst pain in the past week” and “average pain in the past week”, respectively. The total score ranges from -1 to 38 points; the final three items on pain intensity are not included in the score. Cut-off points were chosen in accordance with the original PDQ [ 25 ]. A score ≤ 12 indicates a nociceptive pain profile and a score between 13–18 indicates a possible neuropathic pain profile. A score ≥19 indicates a likely neuropathic pain profile.