Revision within 1 year

By type of revision
Overall revision per hospital
Major revision per hospital
Reasons for revision by type of revision

Hip » Survival » Revision within 1 year » By type of revision

TABLE Cumulative 1-year revision percentage of primary total hip arthroplasties by type of revision in the Netherlands in 2014-2018 (n=148,646)

	Cumulative 1-year revision percentage
	Competing Risk (95% CI)	Kaplan Meier (95% CI)
Any type of revision¹	1.8 (1.7-1.9)	1.8 (1.7-1.9)
Major revision²	1.1 (1.0-1.1)	1.1 (1.0-1.1)
Minor revision³	0.7 (0.7-0.7)	0.7 (0.7-0.7)

¹ Any type of revision includes minor and major revisions as well as revision procedures that could not be classified as minor or major revision.
² Revision of at least the acetabulum or femur component.
³ Only inlay and/or femoral head exchange (including DAIR procedures).
THA: total hip arthroplasty; CI: confidence interval.

In 2014-2018, 1,879 (1.3%) primary THAs were implanted in patients who died within one year after the primary procedure.

Hip » Survival » Revision within 1 year » Overall revision per hospital

FIGURE Funnel plot of proportion of hip revision arthroplasties within one year after a total hip arthroplasty per hospital in the Netherlands in 2014-2018 (n=148,522)

Please note: The proportions of revisions within 1 year per hospital were adjusted for casemix factors age, gender, ASA score and diagnosis (osteoarthritis versus other).

THA: total hip arthroplasty; CI: confidence interval.

The mean 1-year revision percentage is 1.8 (95% CI: 1.7-1.9 ) in the Netherlands in 2014-2018. Confidence intervals indicate the plausible range of outcome if all hospitals perform equally well.

Hip » Survival » Revision within 1 year » Major revision per hospital

FIGURE Funnel plot of proportion of hip major revision arthroplasties within one year after a total hip arthroplasty per hospital in the Netherlands in 2014-2018 (n=148,522)

Please note: Major revision is defined as revision of at least acetabulum or femur compenent.\nPlease note: The proportions of revisions within 1 year per hospital were adjusted for casemix factors age, gender, ASA score and diagnosis (osteoarthritis versus other).

THA: total hip arthroplasty; CI: confidence interval.

The mean 1-year revision percentage is 1.2 (95% CI: 1.2-1.2 ) in the Netherlands in 2014-2018. Confidence intervals indicate the plausible range of outcome if all hospitals perform equally well.

Hip » Survival » Revision within 1 year » Reasons for revision by type of revision

TABLE Reasons for revision within one year in patients that underwent a hip revision arthroplasty by type of revision in the Netherlands in 2014-2018

	Major revision¹ (n=1,635)	Minor revision² (n=1,053)	Any type of revision³ (n=2,732)
Reasons for revision	Proportion⁴ (%)	Proportion⁴ (%)	Proportion⁴ (%)
Infection	12.9	67.1	34.1
Dislocation	34.4	18.1	27.6
Peri-prosthetic fracture	30.3	1.8	19.0
Loosening of femur component	20.6	0.5	12.6
Loosening of acetabulum component	10.0	0.4	6.1
Girdlestone situation	2.6	0.1	1.6
Inlay wear	1.3	1.1	1.2
Peri-articular ossification	0.7	0.5	0.6
Symptomatic MoM bearing	0.1	0.0	0.1
Other	10.2	14.3	11.7

¹ Revision of at least the acetabulum or femur component.
² Only inlay and/or femoral head exchange (including DAIR procedures).
³ Any type of revision includes minor and major revisions as well as revision procedures that could not be classified as minor or major revision.
4 One patient may have more than one reason for revision or re-surgery. As such, the total proportion is over 100%.

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