STUDY   Hips Mean Follow Up (years) Pain Relief ROM HO (%)/ SHO (%)/ Reankylosis (%) Revisions (n) Li [31] 39 3 SI 202 5.3/0/none 1 Malhotra [33] 21 3.5 NS 204 6.4/0/none 1

Table 3: Review of hip resurfacing (HRA) for ankylosing spondylitis