Editorial
Copyright ©2011 Baishideng Publishing Group Co.
World J Orthop. Dec 18, 2011; 2(12): 107-115
Published online Dec 18, 2011. doi: 10.5312/wjo.v2.i12.107
Table 2 Modified New York criteria for ankylosing spondylitis[16]
Low back pain for at least 3 mo duration improved by exercise and not relieved by rest
Limitation of lumbar spine motion in sagittal and frontal planes
Chest expansion decreased relative to normal values for age and sex
Unilateral sacroiliitis grade 3–4
Bilateral sacroiliitis grade 2–4
Definite ankylosing spondylitis if (4a or 4b) and any clinical criterion (1–3)