Table 2

Prevalence of bilateral OA in index cases according to site of narrowing

Site of narrowingBilateral OA
Women (n = 115)Men (n = 76)Both sexes (n = 191)
Results are shown as No (%) in each site of narrowing.
Indeterminate13 (42)8 (50)21 (45)
Superior47 (51)36 (49)83 (50)
Axial46 (81)28 (72)74 (77)
Medial9 (64)4 (57)13 (62)