Table 3.

Amor criteria for the classification of spondyloarthropathies[28]

Amor criteria
Clinical symptoms or history of scoring	Points
Lumbar or dorsal pain at night or morning stiffness of lumbar or dorsal pain	1
Asymmetrical oligoarthritis	2
Buttock pain	1
If alternate buttock pain	2
Sausage like toe or digit	2
Heel pain or other well-defined enthesopathy	2
Iritis	1
Nongonococcal urethritis or cervicitis within 1 mo before the onset of arthritis	1
Acute diarrhea within one month before the 1 mo onset of arthritis	1
Psoriasis, balanitis, or inflammatory bowel disease (ulcerative colitis or Crohn’s disease)	2
Radiological findings
Sacroiliitis (bilateral grade 2 or unilateral grade 3)	3
Genetic background
Presence of HLA-B27 and/or family history of ankylosing spondylitis, reactive arthritis, uveitis, psoriasis, or inflammatory bowel disease	2
Response to treatment
Clear-cut improvement within 48 h after NSAIDs intake or rapid relapse of the pain after their discontinuation	2
A patient is considered as suffering from a pondyloarthropathy if the sum is ≥ 6

NSAID: Nonsterodial anti-inflammatory drug; HLA: Human leukocyte antigen.