STUDY Hips Mean Follow Up (years) Pain Relief (%) ROM HO(%)/ SHO(%)/ Reankylosis Survivorship Revisions (n)
Brinker [30] 20 6 90 187 35/0/None - None
Tang and Chiu [10] 49 6.3 96 NS 74/18/None 95.5% at 10y; 66% at 11 years 2
Bhan# [17] 92 8.5 62 156 13/1/None 99% at 5y; 86% at 8.5y 13
Li [31] 41 NS SI 162 15/0/None - None
Baba [32] 31 12 SI NS 31/6/None 100% at 10y; 63.5% at 15y 4
Bangjian# [18] 24 4.2 100 84FL 12/0/None - None
# Authors reported on ankylosed hips in AS Range of movement  expressed either as an arc of flexion (FL) or a total cumulative range(ROM) HO Heterotropic Ossification; SHO significant HO- Brooker Class 3 and 4 -Survivorship analysis not performed using the Kaplan Meier technique NS Not specified SI significant improvement using pain scores
Table 2: Review of total hip arthroplasty for ankylosing spondylitis (cementless)