Outcome of revision hip arthroplasty in patients younger than 55 years: an analysis of 1,037 revisions in the Dutch Arthroplasty Register

Figures & data

Figure 1. Flowchart of patient selection.

Table 1. Patient characteristics of 1,037 revisions including percentages in parantheses

Factor	Index revisions (n = 1,037)
Age (years)^a	49 (18–54)
Sex
Female	548 (53)
Male	488 (47)
Missing	1 (0.1)
ASA classification
I	401 (39)
II	470 (45)
III–IV	115 (11)
Missing	51 (5)
Reason for index revision^b
Loosening acetabulum	162 (16)
Loosening femur	162 (16)
Dislocation	210 (20)
Infection	169 (16)
Wear cup/liner	35 (4)
Periprosthetic fracture	75 (7)
Other^c	414 (40)

a Median (range)

b Total is more than 100%, as patients can have more than 1 reason for revision.

c Includes periarticular ossification, symptomatic MoM, and Girdlestone procedures.

Table 2. Patient characteristics of 214 re-revisions including percentages in paranthesis

Factor	Re-revisions (n = 214)
Age (years) ^a	50 (19–58)
Sex
Female	103 (48)
Male	111 (52)
ASA classification
I	51 (24)
II	117 (55)
III–IV	36 (17)
Missing	10 (5)
Reason for re-revision^b
Loosening acetabulum	34 (16)
Loosening femur	21 (10)
Dislocation	34 (16)
Infection	74 (35)
Wear cup/liner	8 (4)
Periprosthetic fracture	7 (3)
Other^c	96 (45)

a–c See Table 1.

Table 3. Failure rate (%) of all index revisions, by category of revision and by reason for index revision

Factor	5-year failure rate (95% CI)	10-year failure rate (95% CI)
All index revisions with endpoint re-revision for
any reason	22 (19–25)	28 (24–33)
dislocation	3.8 (2.6–5.2)	3.8 (2.6–5.2)
infection	7.5 (5.9–9.3)	7.8 (6.1–9.6)
acetabular loosening	3.1 (2.1–4.4)	7.0 (4.1–11)
femoral loosening	2.3 (1.5–3.5)	2.7 (1.6–4.1)
Revisions category
total revision	15 (11–21)	18 (13–21)
major partial revision	16 (13–20)	22 (17–27)
minor partial revision	31 (24–39)	50 (32–73)
Reason for index revision
infection	45 (37–55)	45 (37–55)
dislocation	22 (16–29)	29 (20–41)
acetabular loosening	22 (16–33)	31 (21–44)
femoral loosening	18 (13–26)	22 (14–34)

Figure 2. Failure rate by revision category with endpoint re-revision for any reason.

Figure 3. Failure rate by reason for index revision with endpoint re-revision for any reason.