Neuropathic pain in a sample of Egyptian patients with rheumatoid arthritis

Egyptian Rheumatology and Rehabilitation

Table 2 Comparison between Douleur Neuropathique in 4 (DN4) questionnaire and other variables among RA patients with neuropathic pain (n = 14)

Characteristics	DN4 (mean ± SD)	Correlation coefficient	P value
Sex			0.298
Male	7
Female	8.08 ± 0.95
Age (years)		0.021	0.944
Disease duration (years)		0.239	0.410
RF (IU/mL)
Positive	8.09 ± 0.83		0.520
Negative	7.67 ± 1.53		0.520
VAS (0–100 mm)		0.034	0.908
DAS-28 score		− 0.269	0.353
HAQ		0.087	0.769
BMI (kg/m²)		0.405	0.151
ESR (mm/h)		− 0.312	0.277
CRP (mg/L)		0.483	0.080

Data was expressed as means ± SD of DN4 level between males and females, or between RF positive and negative patients, and for these, p values were obtained using independent t test. The correlation between DN4 and other quantitative variables was calculated using Pearson’s correlation test for parametric variables and Spearman’s correlation test for non-parametric variables
RF Rheumatoid factor, Anti-CCP Anti-cyclic citrullinated peptide, VAS Visual analog scale of pain, DAS28 Disease activity for 28 joint indices score, HAQ Health assessment questionnaire, BMI Body mass index, ESR Erythrocyte sedimentation rate, CRP C-reactive protein