Case-Control Study and Meta-Analysis Show a Weak Association between ANTXR2 Polymorphisms and Ankylosing Spondylitis in Chinese Han

Table 1

HLA-B27, sex, history of AS, number, and age of AS and AS⁺AAU⁺ patients.

Phenotype	Total
AS^+AAU^- patients	880
Mean age (year ±S.D.)a		23.91±2.77
History of AS (year±S.D.)b		4.91±3.32
Mean present age (year ±S.D.)		28.82±2.92
Male	610	69.32
Female	270	30.68
HLA-B27^+	853	96.93
AS^+AAU^+ patients	860
Mean age (year ±S.D.)a		33.1±7.64
Mean age (year ±S.D.)c		30.0±9.67
History of AS (year ±S.D.)b		5.51±3.76
Male	581	67.56
Female	279	32.44
HLA-B27^+	725	84.3
Controls	1700
Mean age (year ±S.D.)		25.51±6.24
Male	1171	68.88
Female	529	31.12

a: the average age at the time of AS diagnosis.
b: the average number of years of having AS.
c: the average age at the time of AAU diagnosis.