Table 1.

Relationship between cause of failure^a and time to failure (time interval to revision)

Time interval to revision	Number of hips requiring revision	Aseptic loosening (%)	Infection (%)	Instability (%)	Component failure (%)	Periprosthetic fracture (%)	Pain (%)
<2 years	79	17.70	24	33	3.80	6.30	15.20
2–5 years	39	46.20	10.30	25.60	0.00	5.10	12.80
5–10 years	49	67.30	14.30	10.30	0.00	2	6.10
>10 years	70	90	5.80	0.00	0.00	2.80	1.40
<5 years	118	27.10	19.60	30.5	2.50	5.90	14.40
>5 years	119	80.70	9.20	4.20	0.00	2.50	3.40
Total	237	51.90	15.60	16.90	2.10	5.50	8

^aCause of failure is given in the table as the percentage of the group