Table 4.

List of articles with PD-Q validation.

Authors, Year	Population/Version	Number of Patients	Sensitivity	Specificity	Population Type	Cronbach’s Alpha Coefficient of the Whole Questionnaire
Freynhagen R. et al., (2006) [13]	Original version (German)	392	84.0%	84.0%	Chronic low back pain	0.830
Ghamkhar L. et al., (2021) [76]	Persian version	150	74.70%	98.51%	ChP/low back pain, knee pain, neck pain and shoulder pain	0.760
De Andrés J. et al., (2012) [77]	Spanish version	221	75.0%	84.0%	ChP/NeP, non-NeP, mixed pain	0.860
Alkan H. et al., (2013) [78]	Turkish version	240	77.5%	82.5%	NeP, mixed pain and nociceptive pain	0.810
Gudala K. et al., (2017) [79]	Hindi version	160	82.5%	91.2%	NeP and non-NeP	0.830
Abu-Shaheen A. et al., (2018) [80]	Arabic version	375	67.3%	81.1%	NeP and nociceptive pain	0.764
Sung J. et al., (2017) [81]	Korean version	232	95.4%	73.8%	NeP, nociceptive pain and mixed pain	0.804
Timmerman H. et al., (2018) [82]	Dutch version	291	80.0%	55.0%	ChP/low back with leg pain, neck-shoulder-arm pain or a suspected peripheral nerve damage pain	NA
Matsubayashi Y. et al., (2013) [83]	Japanese version	122	NA	NA	NeP and nociceptive pain	0.780
Rio J. et al., (2022) [65]	Brazilian-Portuguese version	30	NA	NA	Musculoskeletal pain	0.830
Hallström H. et al., (2011) [35]	Swedish version	40	67.9%	83.0%	Spinal cord injury	0.830
Migliore A. et al., (2020) [26]	Italian version	100	85.0%	75.0%	Trigeminal or postherpetic neuralgia as NeP	0.800

NA—not applicable, ChP—chronic pain, NeP—neuropathic pain, non-NeP—non-neuropathic pain.