Neuropathic pain in primary knee osteoarthritis patients: correlation with physical function, quality of life, disease severity, and serum beta nerve growth factor levels

Egyptian Rheumatology and Rehabilitation

Table 2 Frequency of responses for individual items of DN4 questionnaire among OA patients

	OA patients (n=70)		t	P
	Patients with neuropathic pain (n=37)	Patients with non-neuropathic pain (n=33)	t	P
Does the pain have one or more of the following characteristics?
Burning	23 (32.86%)	9 (12.9%)	8.556	0.003*
Painful cold	25 (35.7%)	9 (12.9%)	11.338	<0.001*
Electric shocks	34 (48.7%)	14 (20%)	19.806	<0.001*
Is pain associated with one or more of the following in the same area?
Tingling	16 (22.9%)	8 (11.4%)	2.795	0.095
Pins and needles	31 (44.3%)	11 (15.7%)	18.498	<0.001*
Numbness	21 (30%)	4 (5.7%)	15.136	<0.001*
Itching	16 (22.9%)	11 (15.7%)	0.723	0.395
Is the pain located in an area where physical examination may reveal?
Touch hypoesthesia	21 (30%)	15 (21.4%)	0.892	0.345
Pricking hypoesthesia	16 (22.9%)	11 (15.7%)	0.723	0.395
In the painful area, can the pain be caused or increased by:
Brushing	5 (7%)	1 (1.4%)	2.446	0.118