Table 3.

Correlations between HIMRISS score and clinical and laboratory parameters

	Correlation coefficient	P value
Age at outpatient visit (years)	-0.161	0.134
Age at onset (years)	-0.205	0.055
Disease duration (years)	0.022	0.841
Diagnosis delay (years)	0.091	0.398
Family history, n (%)	0.163	0.129
EAMs, n (%)	0.113	0.299
Uveitis, n (%)	0.154	0.152
IBD, n (%)	-0.023	0.831
Psoriasis, n (%)	0.093	0.387
Use of NSAIDs, n (%)	0.068	0.527
Use of DMARDs, n (%)	0.005	0.966
BMI	-0.137	0.203
HLA-B27 positivity, n (%)	-0.167	0.119
ESR (mm)	0.426	< 0.001*
CRP (mg/L)	0.449	< 0.001*
hsCRP(mg/L)	0.398	< 0.001*
ALB (g/L)	-0.167	0.120
HGB(g/L)	-0.267	0.012*
BASDAI	0.540	< 0.001*
BASFI	0.581	< 0.001*
ASQOL	0.478	< 0.001*
ASDAS-ESR	0.604	< 0.001*
ASDAS-CRP	0.575	< 0.001*
SF-12PCS	-0.270	0.011*
SF-12MCS	-0.222	0.037*
HHS	-0.468	< 0.001*

^*P < 0.05, HIMRISS Hip inflammation MRI scoring system, EAMs extra-articular manifestations, IBD inflammatory bowel disease, NSAIDs nonsteroidal anti-inflammatory drugs, DMARDs disease modifying anti-rheumatic drugs, BMI bone mass density, HLA-B27 human leucocyte antigen-B 27, ESR erythrocyte sedimentation rate, CRP C reactive protein, hsCRP high sensitive C reactive protein, ALB albumin, HGB hemoglobin, BASDAI Bath ankylosing spondylitis disease activity index, BASFI Bath ankylosing spondylitis functional index, ASQOL ankylosing spondylitis quality of life, ASDAS Ankylosing Spondylitis Disease Activity Score, SF-12 PCS short form-12 physical component summary, SF-12 MCS short form-12 mental component summary, HHS Harris hip score, BASRI-Hip the bath ankylosing spondylitis radiology hip index

Group A represents the hips with no hip involvement (HHS ≥ 80 and BASRI ≤ 1), group B represents the hips with mild hip involvement (BASRI = 2 or BASRI ≤ 1 and HHS ≤ 79) and Group C represents the hips with advanced hip involvement (BASRI ≥ 3)

The value of continuous variables was presented as mean ± standard deviation and the categorical variables were based on presented as number plus percentage