Cementless total hip arthroplasty for three different degrees of hip involved secondary to ankylosing spondylitis: an analysis of 195 hips

Table 2 Clinical outcomes and functional evaluation of all included patients preoperatively and at the latest follow-up

Variable	Group A	Group B	Group C	P value
Pre-HHS	31.5 ± 4.3	30.9 ± 3.8	30.9 ± 5.0	0.641
Rating (no. of hips)				0.892
Excellent (90–100 points)	0 (0%)	0 (0%)	0 (0%)
Good (80–89 points)	0 (0%)	0 (0%)	0 (0%)
Fair (70–79 points)	0 (0%)	0 (0%)	0 (0%)
Poor (< 70 points)	94 (100%)	49 (100%)	52 (100%)
Post- HHS	89.1 ± 3.2 ^b	88.2 ± 3.2 ^b	83.7 ± 2.3	< 0.001*
Rating (no. of hips)				< 0.001*
Excellent (90–100 points)	45 (47.9%)	13 (26.5%)	0 (%)
Good (80–89 points)	47 (50%)	35 (71.4%)	48(92.3%)
Fair (70–79 points)	2 (2.1%)	1 (2.0%)	4 (7.7%)
Poor (< 70 points)	0 (0%)	0 (0%)	0(0%)
Pre- ROM (°)	72.2 ± 27.5 ^{a, b}	0	0	< 0.001*
Pre- flexion contracture (°)	7.3 ± 11.6 ^{a, b}	23.6 ± 20.3 ^b	38.1 ± 19.1	< 0.001*
Pre- flexion (°)	79.5 ± 23.8 ^{a, b}	23.6 ± 20.3 ^b	38.1 ± 19.0	< 0.001*
Post- ROM (°)	106.2 ± 9.9 ^{a, b}	102.3 ± 9.1 ^b	84.1 ± 4.9	< 0.001*
Post- flexion contracture (°)	0.8 ± 2.2	0.9 ± 2.4	1.3 ± 3.1	0.457
Post- flexion (°)	106.9 ± 9.5 ^{a, b}	103.3 ± 8.7 ^b	85.5 ± 4.7	< 0.001*
Post- abduction (°)	33.7 ± 3.6	33.5 ± 4.4	32.6 ± 4.0	0.244
Satisfication level				0.546
Very satisfied	80 (96.4%)	45(95.7%)	39 (97.5%)
Satisfied	3 (3.6%)	2(4.3%)	1 (2.5%)
Somewhat unsatisfied	0 (0%)	0 (0%)	0 (0%)
Unsatisfied	0 (%)	0 (%)	0 (%)
SF-12
PCS	22.1 ± 1.8	22.1 ± 1.8	21.6 ± 2.3	0.441
MCS	25.4 ± 2.1	24.9 ± 2.2	25.0 ± 1.9	0.429

Values are expressed as mean ± SD
P values with statistical significance are marked with *
Pre- preoperative, Post- postoperative, HHS Harris hip score, ROM range of motion, PCS physical component summary, MCS mental component summary
^aSignificantly different from group B
^bSignificantly different from group C

ISSN: 1749-799X