Using mesh in capsule anatomical reconstruction to enhance the stability of high-dislocation-risk hip arthroplasty: a randomized controlled trial

Table 1 Pre-operation demographics data

Variables	Mesh reconstruction group (n = 51 Hips)	Conventional capsular repair group (n = 55 Hips)		P value
Variables	n (%) or Mean ± Standard deviation			P value
Age at surgery (y)*	73.9 ± 4.78	74.5 ± 6.19	t = − 0.527	0.599
BMI (kg/m²)*	25.1 ± 3.16	24.9 ± 3.37	t = 0.191	0.849
Sex^†			χ² = 0.907	0.341
Male/female	15 (29%)/36 (71%)	21 (38.2%)/34 (61.8%)
Side†			χ² = 0.593	0.441
Left/right	24 (47%) / 27 (53%)	30 (54%) / 25 (46%)
ASA score^†			χ² = 1.298	0.255
2 /3	37 (73%) / 14 (27%)	45 (82%) / 10 (18%)
Reason for hip arthroplasty^†
Femoral fracture	14 (28%)	11 (20%)	χ² = 0.055	0.815
Osteonecrosis	21 (41%)	26 (47%)	χ² = 0.398	0.528
Osteoarthritis	16 (31%)	18 (33%)	χ² = 0.022	0.881
Risk for dislocation^†
Neuromuscular disease	9 (18%)	13 (24%)	χ² = 0.577	0.447
Multi-segmental lumbar spine fusion	22 (43%)	19 (34%)	χ² = 0.824	0.364
Obesity (BMI ≥ 35 kg/m²)	17 (33%)	18 (33%)	χ² = 0.004	0.947
Poor muscle strength (< grade 4)	3 (6%)	5 (9%)	χ² = 0.390	0.532

BMI, Body mass index, ASA, American society of anesthesiologists. THA, total hip arthroplasty
*The values are given as the mean and standard deviation
^†The values are given as the number with the percentage in parentheses

ISSN: 1749-799X