Diagnostic Performance of Red Cell Distribution Width in Adult Iraqi Patients with Ankylosing Spondylitis

Table 1

Demographic and clinical characteristics of patients and controls.

Variables	Controls	Patients	P value
Number	146	100	-
Age (mean SD), years	35.8 ± 8.3	38.0 ± 9.0	0.057
Sex			0.081
Female	47 (32.2%)	22 (22.0%)
Male	99 (67.8%)	78 (78.0%)
BMI	28.6 ± 3.8	28.3 ± 5.5	0.596
Smoking	45 (30.8%)	41 (41.0%)	0.100
Disease duration	-	9.0 (5.0 – 13.8)	-
BASDAI	-	4.2 ± 1.6	-
BASFI	-	4.1 ± 1.6	-
Biologics	-	89 (89%)	-
DMARDs	-	17 (17%)	-
NSAIDs	-	68 (68%)	-
Steroids	-	5 (5%)	-
ESR median (IQR), mm/hr	10(5.25-15.75)	34 (18 – 50.8)	<0.0001
CRP median (IQR), mg/dl	2(1-3)	9 (5 – 15.2)	<0.0001

SD: standard deviation, BMI: body mass index, BASDAI: Bath Ankylosing Spondylitis Disease Activity Index, BASFI: Bath Ankylosing Spondylitis Functional Index, DMARDs: disease modifying antirheumatic drugs, NSAIDs: nonsteroidal anti-inflammatory drugs, ESR: erythrocytes sedimentation rates, CRP: C-reactive protein, and IOQ: interquartile range.