Migraine in patients with rheumatoid arthritis and its relation to disease activity

Table 4 Comparisons of quantitative data between migraine cases according to MRI findings

Quantitative data	Normal brain MRI	Abnormal brain MRI	Z value	P value
N (%)	28 (45.2%)	34 (54.8%)	Z value	P value
Age (years)	38.5 (34.3–46)	45(38.3–49.8)	2.125	0.034
Rheumatoid disease duration (years)	6.5 (4–8.3)	9.5 (5.5–11)	2.431	0.015
ESR	56.5 (49–68)	70 (55–81.3)	2.288	0.022
CRP	41.5 (35–50)	45 (38–55)	0.823	0.411
Disease Activity Score (DAS-28)	3.5 (2.9–4)	4 (3.2–4.2)	1.492	0.136
MHAQ	1.4 (1.0–1.9)	1.5 (1.0–2.0)	0.666	0.505
Migraine duration (years)	4 (2.8–6)	8 (4–16)	2.892	0.004

Bod values indicate P value is significant (less than 0.05)
Data are median (25th percentile–75th percentile), test of significance is Mann–Whitney U-test
P value significant < 0.05, MRI, magnetic resonance imaging; DAS, Disease Activity Score; MHAQ, Modified Health Assessment Questionnaire; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein